Metronics Quadra-chek 200 User Manual

Quadra-Chek® 200

User’s Guide

Quadra-Chek® 200

User’s Guide

Metronics, Inc.
Bedford, New Hampshire, USA

Proprietary Notice

Disclaimer

Trademarks

All information set forth in this document, all rights to such information, any
and all inventions disclosed herein and any patents that might be granted by
employing the materials, methods, techniques or apparatus described herein
are the exclusive property of Metronics Incorporated, Bedford, New Hamp­shire.

No part of this document may be reproduced, stored in a retrieval system, or
transmitted in any form or by any means, electronic, mechanical, photocopy­ing, recording, or otherwise, without the prior permission of Metronics In­corporated. The information contained herein is designed only for use with
the Quadra-Chek 200 Digital Readout. Metronics Incorporated is not re­sponsible for any use of this information as applied to any other apparatus.

The information contained in this document is subject to change without
notice. Metronics Incorporated assumes no responsibility or liability for any
errors or inaccuracies contained herein, or for incidental or consequential
damage in connection with the furnishing, performance, or use of this guide.

Metronics Inc. shall not be liable to the purchaser of this product or third
parties for damages, losses, costs, or expenses incurred by the purchaser or
third parties as a result of: accident, misuse, or abuse of this product or unau­thorized modifications, repairs, or alterations to this product, or failure to
strictly comply with Metronics Incorporated’s operating and maintenance
instructions.

Metronics, Quadra-Chek, Quadra-Chek 200, and QC200 are registered trade­marks of Metronics Incorporated.

Safety & Maintenance
Considerations

Other product names used herein are for identification purposes only and
may be trademarks of their respective owners. Metronics Incorporated dis­claims any and all rights to those marks.

General safety precautions must be followed when operating the system.
Failure to observe these precautions could result in damage to the equipment,
or injury to personnel. It is understood that safety rules within individual
companies vary. If a conflict exists between the material contained in this
guide and the rules of a company using this system, the more stringent rules
should take precedence.

Although Metronics strongly recommends that you read all parts of this guide,
it is essential for reliable and safe operation to read the first portions up to and
including Chapter 3: Operation, prior to operating the QC200.

Location & Mounting

Cleaning

Electrical

General Maintenance

The QC200 must be placed or mounted on a stable, reliable surface. If the
QC200 should fall, it could become seriously damaged and more impor­tantly could cause injuries to the user. For mounting instructions, refer to
the Getting Started section of Chapter 3: Operation, for the mounting bolt
hole pattern.

Use only a cloth dampened with water and a mild detergent for cleaning the
exterior surfaces. Never use abrasive cleaners, and never use strong deter­gents or solvents. Only dampen the cloth, do not use a cleaning cloth that is
dripping wet.

Do not allow the power cord to be located such that it can be walked on or
create a tripping hazard.

WARNING
Unplug the QC200 from the electrical outlet before cleaning.

WARNING
The QC200 is equipped with a 3-wire power plug that includes
a separate ground connection. Always connect the power plug
to a 3-wire grounded outlet. The use of 2-wire power plug
adapters or any other connection accessories that remove the
third grounded connection create a safety hazard and should
not be permitted. If a 3-wire grounded outlet is not available,
ask your electrician to provide one.

Unplug the QC200 from the wall outlet and seek the assistance of a qualified
service technician if:

• The power cord is frayed or damaged or the power plug is damaged

• Liquid is spilled or splashed onto the enclosure

• The QC200 has been dropped or the exterior has been damaged

• The QC200 exhibits degraded performance or indicates a need for

service some other way

Backup Battery
Charging

The QC200 utilizes an internal battery to maintain system configuration
settings during power interruptions. A battery circuit charges this backup
battery during periods of normal operation.

When the QC200 is used on a daily basis, the backup battery will be ad­equately charged to maintain configuration settings during power outages.
However, over extended periods of nonuse, the battery might lose the charge
necessary to maintain configuration settings. To keep the backup battery
charged over extended periods of nonuse, apply power to the QC200 and
leave it turned on for a minimum of 2 days each month.

FCC Compliance
Statement

FCC Rule NP15R Rev. 23, June, 1989
This equipment has been tested and found to comply with the limits for a
Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference when
the equipment is operated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions in this guide, may cause harm­ful interference to radio communication. Operation of this equipment in a
residential area is likely to cause harmful interference, in which case the user
will be required to correct the interference at his own expense.

Shielded cables must be used with this unit to ensure compliance with Class
A FCC limits. The connection of a nonshielded equipment interface cable to
this equipment will invalidate the FCC Certification of this device and may
cause interference levels which exceed the limits established by the FCC for
this equipment. It is the responsibility of the user to obtain and use a shielded
equipment interface cable with this device. Do not leave cables connected to
unused interfaces. Changes or modifications not expressly approved by the
manufacturer could void the user’s authority to operate the equipment.

FF

or Canadian Uor Canadian U

F

or Canadian U

FF

or Canadian Uor Canadian U
This Class “A” digital apparatus meets all requirements of the Canadian In­terference-Causing Equipment Regulations.

sers:sers:

sers:

sers:sers:

Cet appareil numérique de la classe “A” respecte toutes les exigences du
Reglement sur le matériel brouilleur du Canada.

Guide Part Number: 11A10487

Printing History:
April, 2000 First Printing Revision 1.0
June, 2000 Second Printing Revision 2.0
November, 2001 Third Printing Revision 3.0
November, 2002 Fourth Printing Revision 3.1
December, 2004 Fifth Printing Revision 4.0

Software Version: 1.23

Printed in the USA

About this Guide

Who Should Read
This Guide

What This Guide
Covers

Introduction

The material in this guide is divided into eight chapters. Topics range from
basic operating instructions to programming and system configuration. Chap­ters 1 through 3 contain the essential information to use the QC200. Do not
operate the QC200 unless the material in these chapters is thoroughly under­stood.

Keep this guide in a convenient location. Refer to it any time additional
information about the use and operation of the QC200 is needed. Use the
index to locate information by subject. Additional information related to
this guide can be found on the Internet at www.metronics.com/help.html.

This guide is intended for operators, technicians, supervisors, and dealer rep­resentatives.

NOTE
System setup and configuration instructions provided in chapter
7 are intended for qualified supervisors, dealer representatives
and OEMs only. Operators should not attempt to alter the
configuration of the QC200.

Chapter 1: Overview
This chapter describes the use and application of the QC200 digital readout
and includes an annotated drawing and technical specifications.

Chapter 2: Quick-start
Use this chapter as a basic user tutorial. The quick start demonstration pro­vides QC200 operation instructions with a minimum of details.

Chapter 3: Operation
This chapter includes detailed descriptions of controls and indicators, and
instructions for measuring, constructing, creating, and tolerancing features.

Conventions & Terms

Chapter 4: Programming
This chapter contains instructions for recording, running, and editing QC200
programs.

Chapter 5: Edge detectors
Information in this chapter provides background and reference material re­garding edge detector installation and operation.

Chapter 6: Communications
Use this chapter to connect the QC200 to a printer or computer via the RS­232 or parallel port.

Chapter 7: Setup
This chapter contains system configuration instructions for qualified super­visors and dealer representatives.

Chapter 8: Reference
This chapter contains additional information about quantization error, best
fit algorithms, and repeatability.

The terms Quadra-Chek 200, QC200 in this guide refer to the Quadra-Chek
200 digital readout. System refers to the QC200 and the measuring device
connected to it.

Comparator refers to any device intended to measure parts in 2 dimensions.
Crosshairs and edge detector refer to the probing method of the connected measur-
ing device. Probing refers to the process of measuring a point on a feature.

A program is simply a series of key-presses used to perform measurements and
stored by the system for later use.

Icons

Type Styles

This guide uses the following icons to highlight information:

Warning

The raised hand icon warns of a situation or condition that can lead to per­sonal injury or death. Do not proceed until the warning is read and thor­oughly understood. Warning messages are shown in bold type.

Caution

The exclamation point icon indicates a situation or condition that can lead to
equipment malfunction or damage. Do not proceed until the caution mes­sage is read and thoroughly understood. Caution messages are shown in bold
type.

Note

The note icon indicates additional or supplementary information about an
activity or concept. Notes are shown in bold type.

Warnings, cautions, and notes are shown in this typeface.

Italics indicate menu items, front panel keys, input fields, or soft keys.

Measurement Polarity

Display Resolution
in this Guide

Accuracy & Precision

System Configuration
& Setup

Instructions in this guide assume that:

• Moving crosshairs to the right causes the X axis counts to increase in a

positive direction; 1 to 2 to 3 and so on.

• Moving crosshairs up causes the Y axis counts to increase in a positive

direction; 1 to 2 to 3 and so on.

• Rotating crosshairs counterclockwise causes the Q axis counts to in

crease in a positive direction; 1 degree to 2 degrees to 3 degrees and
so on.

• To reverse the count direction of any axis, see the encoders section of

chapter7: setup.

Generally, the display resolution shown in this guide is one ten-thousandth
of an inch (0.0001in) or two microns (0.002mm). Display resolutions in
this guide are examples only. User display resolutions are likely to vary ac­cording to the specific application.

Measurement accuracy is determined by the resolution of the encoders on the
measuring device. Generally, the display resolution of the QC200 can exceed
the encoder resolution. Setting the display resolution to exceed the encoder
resolution does not increase measurement accuracy. See chapter 7: setup for
more information.

All system setup and configuration must be performed by an authorized
Metronics distributor or OEM. Setup includes calibration with the measur­ing device and configuration of non-linear error compensation (NLEC) if
needed.

Anytime the QC200 is connected to a different measuring device, it is neces­sary to perform configuration and setup again. Qualified supervisory per­sonnel should refer to chapter 7: setup or contact their Metronics distributor
for assistance.

WARNING
Electrical shock risk: do not open the QC200 enclosure. There
are no user-serviceable components or assemblies inside.
Contact your Metronics distributor for service and maintenance.

ContentsContents

Contents

ContentsContents

1 Overview.................................................................................. 1-1

Specifications .................................................................................... 1-5

2 Quick-Start Demonstration ................................................... 2-1

Before You Begin ...............................................................................2-1

Getting Started ................................................................................... 2-1

Safety Reminders .............................................................................. 2-2

Location and mounting ............................................................ 2-2

Checking connections ............................................................. 2-2

Power cord and plug ............................................................... 2-2

Power surge suppressor ......................................................... 2-2

Liquids .................................................................................... 2-2

Configuration & System Setup................................................. 2-2

Applying power .................................................................................. 2-3

Power-up screen ..................................................................... 2-3

Adjusting LCD tilt .................................................................... 2-3

Adjusting LCD contrast............................................................ 2-4

Selecting measurement and display modes ............................ 2-4

Probing methods ..................................................................... 2-5

To select optical edge/crosshair probe .................................... 2-5

Backward/forward annotation .................................................. 2-6

Skewing the Part ................................................................................ 2-7

To skew a part ......................................................................... 2-7

Set the Datum .................................................................................... 2-10

To construct a datum ................................................................ 2-10

Measuring Lines ............................................................................... 2-14

To measure a line .................................................................... 2-14

Measuring Circles ............................................................................. 2-17

To measure a circle ................................................................. 2-17

Tolerancing ........................................................................................ 2-20

Perform a true position tolerance on a circle ............................ 2-20

Contents-1

Table of Contents

3 Operation................................................................................. 3-1

Using the QC200 ............................................................................... 3-1

Getting Started ................................................................................... 3-2

Safety Reminders .............................................................................. 3-2

Location and mounting ............................................................ 3-2

Power cord and plug ............................................................... 3-2

Power surge suppressor ......................................................... 3-2

Liquids .................................................................................... 3-2

Checking connections ............................................................. 3-2

Configuration & System Setup................................................. 3-3

Applying power .................................................................................. 3-3

Power-up screen ..................................................................... 3-3

Adjusting LCD tilt .................................................................... 3-4

Adjusting LCD contrast............................................................ 3-4

Controls & Display ............................................................................. 3-5

Mode selection keys................................................................ 3-5

Feature selection keys ............................................................ 3-7

Soft keys ................................................................................. 3-9

Command keys ....................................................................... 3-9

Arrow keys .............................................................................. 3-10

Zero axes keys ........................................................................ 3-10

Fast track keys ........................................................................ 3-11

Numeric keypad ...................................................................... 3-11

Send/print ............................................................................... 3-12

LCD on/off............................................................................... 3-12

Menu key .................................................................................3-12

Menus ................................................................................................3-13

Setup menu ............................................................................. 3-13

Program (prog) menu ............................................................. 3-13

Extra menu .............................................................................. 3-14

Clear menu ............................................................................. 3-16

Edge menu ............................................................................. 3-17

LCD screens ..................................................................................... 3-18

DRO screen ............................................................................ 3-19

Data screens........................................................................... 3-19

Graphic screens ...................................................................... 3-20

Contents-2

Quadra-Chek® QC200

Features ............................................................................................ 3-23

Features list ............................................................................ 3-23

Probing Features ............................................................................... 3-23

Probing Technique .................................................................. 3-24

To select optical edge/ crosshair probe ................................... 3-24

To toggle between auto edge and manual edge detection ........ 3-25

Backward/forward annotation .................................................. 3-26

To select backward/forward annotation .................................... 3-26

To increase the required number of points (forward annotation) 3-29

Skewing the part ..................................................................... 3-30

To skew a part ......................................................................... 3-30

Datum ..................................................................................... 3-32

To construct a datum ................................................................ 3-32

Measuring Features ........................................................................... 3-37

Measuring points ..................................................................... 3-38

To measure a point .................................................................. 3-38

Measuring lines ....................................................................... 3-39

To measure a line .................................................................... 3-39

Measuring circles .................................................................... 3-41

To measure a circle ................................................................. 3-41

Measuring distances ............................................................... 3-44

To construct a distance between two circles ............................3-44

Measuring angles .................................................................... 3-46

To measure an angle ............................................................... 3-46

Using Measure Magic ........................................................................ 3-50

To measure a circle using measure magic ............................... 3-51

To measure a series of features

using measure magic and auto repeat .......... 3-54

Changing feature types............................................................ 3-59

To change a feature type ......................................................... 3-59

Creating Features .............................................................................. 3-61

To create a point ...................................................................... 3-61

To create a line ........................................................................ 3-63

To create a circle ............................................................... 3-65

To create a distance .......................................................... 3-67

To create an angle ............................................................. 3-69

Contents-3

Table of Contents

Constructing Features .................................................................. 3-73

Point Constructions ...................................................................... 3-78

Line Constructions ....................................................................... 3-79

Circle Constructions ..................................................................... 3-80

Distance Constructions ................................................................ 3-81

Angle Constructions ..................................................................... 3-81

Deleting Features ........................................................................ 3-82

Deleting a Skew........................................................................... 3-86

Tolerancing .................................................................................. 3-90

Point Tolerances .......................................................................... 3-91

Line Tolerances ............................................................................ 3-94

Circle Tolerances ......................................................................... 3-102

Distance Tolerances..................................................................... 3-115

Angle Tolerances ......................................................................... 3-119

To create a skew ............................................................... 3-71

Using the recall soft key ..................................................... 3-74

To construct a distance from a point and circle ................... 3-74

Constructing a skew .......................................................... 3-76

To construct a skew from two circles .................................. 3-76

To delete individual features .............................................. 3-82

To delete all features from the features list .......................... 3-84

To delete a skew ............................................................... 3-86

To delete all features, datums, and skews .......................... 3-88

To perform a true position tolerance on a point ................... 3-91

To perform a bi-directional tolerance on a line .................... 3-94

To perform a perpendicularity tolerance on a line ............... 3-97

To perform a form tolerance on a line ................................. 3-100

To perform a true position tolerance on a circle .................. 3-102

To perform a MMC tolerance on a circle ............................ 3-106

To perform a concentricity tolerance on a circle .................. 3-110

About the runout tolerance ................................................. 3-112

To perform a runout tolerance on a circle ............................ 3-112

To perform a width tolerance on a distance ........................ 3-115

To perform an angle tolerance ........................................... 3-119

Contents-4

Quadra-Chek® QC200

4 Programming ...................................................................... 4-1

Sample Program ......................................................................... 4-2

To create the sample program ........................................... 4-2

Running a program ............................................................ 4-12

To run a program ............................................................... 4-12

Editing Programs ......................................................................... 4-15

To display program steps .................................................. 4-15

Viewing compressed steps ............................................... 4-17

To expand a compressed program step ............................ 4-17

Program properties step ................................................... 4-18

To edit program properties step ......................................... 4-19

System settings step ......................................................... 4-20

To edit the system settings step ......................................... 4-21

To edit a feature measurement step ................................... 4-23

Inserting new steps ............................................................ 4-24

To insert a new step in a program ...................................... 4-24

To delete a program step ................................................... 4-27

Copying programs ....................................................................... 4-28

Deleting programs ....................................................................... 4-31

5 Edge Detectors ................................................................... 5-1

Manual edge detection ...................................................... 5-1

Auto edge detection .......................................................... 5-1

To toggle between auto edge and manual edge detection .. 5-1

Connections ................................................................................. 5-3

Connecting fiber-optic cables ............................................ 5-4

Connecting the screen sensor cable to the comparator ...... 5-4

Connecting the reference cable ......................................... 5-5

Checking the sensor light levels ......................................... 5-6

To check sensor cable light levels ...................................... 5-6

Troubleshooting ........................................................................... 5-8

Light Levels ................................................................................. 5-8

Screen level too high ......................................................... 5-8

Screen level too low .......................................................... 5-8

Reference level too high .................................................... 5-8

Contents-5

Table of Contents

Reference level too low...................................................... 5-8

Edge Detector ............................................................................. 5-9

Calibration ................................................................................... 5-9

Teach ................................................................................ 5-9

To perform a teach calibration ........................................... 5-9

Distance calibration (d. cal) ............................................... 5-12

To perform a distance calibration ....................................... 5-12

Cross calibration (x cal) ..................................................... 5-16

To perform cross calibration .............................................. 5-16

6 Communications ................................................................6-1

Connections ................................................................................. 6-1

To connect to a PC using the RS-232 cable ....................... 6-1

Using HyperTerminal .................................................................... 6-2

To connect to a computer using HyperTerminal .................. 6-2

To send data from the QC200 to HyperTerminal ................. 6-11

Using WinWedge® ...................................................................... 6-12

To connect to a computer using WinWedge® .................... 6-12

To send data to WinWedge®............................................. 6-19

Ascii codes ....................................................................... 6-20

Printer connections............................................................ 6-22

To connect to a parallel printer ........................................... 6-22

To connect to a serial printer .............................................. 6-24

Keyboard Commands .................................................................. 6-27

7 Setup .................................................................................... 7-1

Before You Begin ......................................................................... 7-1

Supervisor password ........................................................ 7-1

To enter the supervisor password ...................................... 7-2

Setup Screens ............................................................................. 7-4

About ................................................................................ 7-4

Display .............................................................................. 7-5

Encoders .......................................................................... 7-7

To calibrate the Q axis ....................................................... 7-11

To check Q axis calibration ................................................ 7-14

Contents-6

Quadra-Chek® QC200

To calibrate a filar axis ....................................................... 7-15

To check filar axis calibration ............................................. 7-18

Hot Keys ........................................................................... 7-19

To assign a hot key function ............................................... 7-20

Print .................................................................................. 7-24

Form characters (form chars) ............................................ 7-29

Ports ................................................................................. 7-29

Measure ............................................................................ 7-34

Sounds ............................................................................. 7-38

Supervisor......................................................................... 7-42

Squareness....................................................................... 7-43

LEC, SLEC, NLEC ........................................................... 7-44

Scale factor ....................................................................... 7-45

Miscellaneous (misc) ......................................................... 7-47

Clock ................................................................................ 7-50

Error Correction ........................................................................... 7-52

Linear error correction (LEC)............................................. 7-55

To setup linear error correction .......................................... 7-57

Segmented linear error correction (SLEC) ........................ 7-61

To setup SLEC .................................................................. 7-63

Non-linear error correction (NLEC) .................................... 7-75

To setup NLEC .................................................................. 7-76

8 Reference ............................................................................ 8-1

Repeatability ................................................................................ 8-3

Best Fit Algorithms ....................................................................... 8-4

LSBF (lines and circles) .................................................... 8-4

ISO (lines and circles)........................................................ 8-4

Inner (circles only) ............................................................. 8-4

Outer (circles only) ............................................................ 8-4

Index

Contents-7

Table of Contents

Contents-8

Chapter 1
Overview

Metronics is the world’s premiere developer of metrology software and digital
readouts for measuring and inspecting 2D and 3D geometric components. The
Quadra-Chek 200® is an advanced digital readout system for 2, 3 and 4 axis
measurement systems.

Use the QC200® to inspect manufactured parts that demand very high levels
of precision and accuracy. Connect the QC200® to optical comparators,
toolmaker’s microscopes, or video measurement systems as part of in-line produc­tion activities or final quality inspection.

1-1

Chapter 1 Overview

Save time and increase productivity with the QC200. Enter points using crosshairs
or optical edge detection. Use Measure Magic® to interpret point data and
determine feature geometry automatically. Compensate for imperfect part align­ment using the skew function. Define hot keys to perform common tasks at the
press of a button. Automate repetitive inspections using the programming
capability.

The user interface retains many functions and features familiar to users of the
Quadra-Chek 2000® and other Metronics products. In addition, more informa­tion is given to the operator via the graphic LCD display. Data is clearly pre­sented on one screen, eliminating the need to page or scroll for information.

The compact ergonomic design allows the QC200 to mount on a wide variety of
equipment. Use the tilt front panel to adjust the display to your viewing require­ments. Rubber feet on the bottom prevent slipping when the system is not
permanently bolted to a surface. Bolt holes on the mounting stand match the
pattern on the QC2000 for ease of retrofitting.

Above all, the QC200 simplifies complex inspection tasks. Essentially there are
only three things to measure: points, lines, and circles. Angles and distances are
really just relationships between points, lines, and circles. Points, lines, and circles
are referred to as features while angles and distances are called relationships. Plan
inspections by identifying features on the part.

1-2

Quadra-Chek® QC200

Use the front panel keys to perform standard inspection tasks. Select measure­ment functions, change operation and display modes, enter numeric data, zero
axes, turn the LCD display on/off, or send data to a printer or computer with the
press of a button. The illustration below shows the location of the various panel
keys.

Soft keys execute measurement-specific functions. Depending on the current
task, various soft key options are displayed on the bottom of the LCD screen.
Press the soft key beneath the displayed option to execute the desired function.

Fast track keys are located above the LCD. By default, the left fast track key is the
same as the enter key and the right is the same as the finish key. Users can save time
by programming the fast track keys to perform common tasks. Most front panel
keys can be programmed in the same way. Since the fast track keys are fairly large,
users can find them by touch without looking at the QC200.

1-3

Chapter 1 Overview

All front panel keys (except fast track keys) provide tactile sensory feedback.
Additionally, supervisors can configure keys to provide audio feedback. The
QC200 is equipped with a speaker and external speaker jack. Adjust speaker
volume to suit the operating environment or plug a headset into the speaker jack.

Transmit measurement data to a computer over the RS-232 port connection, or
to a printer over the parallel or RS-232 port.

1-4

An optional foot switch and remote keypad are available for feature-point and
numeric data entry. Use these devices when the QC200 is mounted out of the
operator’s reach.

Specifications

Quadra-Chek® QC200

Input Voltage Range: 85 VAC to 264 VAC. 1.0 Amp maximum

(Auto switchable)
Fuse: 1.6 Amp 250V Slow Blow 5X20mm
Input Frequency: 43Hz to 63Hz

CAUTION
For continued protection against fire, use replacement fuse with
the specified voltage and current ratings only.

Environmental Conditions

Temperature: 0°C to 45°C (32°F TO 113°F)

non-condensing
Humidity: 90%rh
Altitude: 2000 meters
Installation Category: II

Dimensions

Enclosure (WxHxD): 11.5” X 7.5” X 2.75”
Base (WxHxD): 10” X 2” X 7.8”
Enclosure weight: 3.5 lbs.
Base weight: 7 lbs.

LCD

Size/color: 5.7” black and white
Display digit size: 0.5”
Resolution: 0.000004” or 0.0001mm

ENC tests: EN61326:1998

EMC for electrical equipment for measurement, con

trol and laboratory use

EN61010

Safety requirements for electrical equipment for mea

surement, control and laboratory use

WARNING
Electrical shock risk: do not remove cover or open the enclosure.
There are no user-serviceable parts inside. Contact your
Metronics distributor for service.

1-5

Chapter 1 Overview

1-6

Before You Begin

Chapter 2
Quick-Start Demonstration

Use this chapter to learn the basic operation of the Quadra-Chek 200. The
demonstrations in this chapter help experienced operators start using the QC200
immediately. Less experienced operators may need to read chapter 3: operation to
understand some of the material in this chapter. Perform the indicated steps on
your QC200 while reading this material for best results. Demonstrations in this
chapter show crosshair measurement on an optical comparator. Apply these
concepts to the use of optical edge detection as well.

In this chapter users will learn to:

• Set up the QC200 for measuring

• Skew a part

• Datum a part

• Construct a point

• Measure a line and circle

• Perform a tolerance

Getting Started

See chapter 3: operation for complete operating principles and step-by-step dem-
onstrations.

Illustrations in this chapter show a 2 axis (XY) system with factory default set­tings.

Read and understand all safety and operating instructions before operating the
QC200. To complete the tasks described in this chapter, users must understand
the inspection process, the measuring device used, and the controls, indicators,
and information presented on the QC200 display.

NOTE
Operators are required to understand part fixturing and probing
techniques that apply to the measuring device connected to the
QC200.

2-1

Chapter 2 Quick-Start Demonstration

Safety Reminders

Location and mountingLocation and mounting

Location and mounting

Location and mountingLocation and mounting

Mount the QC200 on a stable surface. If it falls, serious damage or injury can
result.

Checking connections

Perform routine inspections on all connections to the digital readout system.
Keep connections clean and tight. Locate cables away from moving objects. Do
not create tripping hazards with the power cords and connection cables.

Use shielded cables to connect to the parallel and serial (RS-232) output ports.
Make certain cables are properly terminated and firmly connected on both ends.

CAUTION
Never connect the power cable to the QC200 with the power
switch in the ON position. Optical edge detector cables may be
connected or disconnected without placing the switch in the
OFF position.

Power cord and plug

Make sure the power cord is not located where it can be walked on or create a
tripping hazard. Connect the 3-wire power plug to a 3-wire grounded outlet
only. Do not attempt to adapt or remove the 3rd ground wire to fit the plug in
2-wire electrical outlet. Modifying or overriding these features creates a safety
hazard and should not be permitted.

2-2

Power surge suppressor

Use a high-quality power surge suppressor to limit the amplitude of potentially
damaging power line transients caused by electrical machinery or lightning. The
surge suppressor found on inexpensive power strips is insufficient to protect the
QC200 from damage.

Liquids

Do not spill or splash liquids on the QC200 enclosure.

Configuration & System Setup

Only qualified supervisors and dealer representatives should perform system
configuration and setup. Operators should not attempt to alter the configura­tion of the QC200.

Applying power

Quadra-Chek® QC200

Move the power switch located on the back of the QC200 to the ON position.
The system initializes and displays the power-up screen.

Power-up screenPower-up screen

Power-up screen

Power-up screenPower-up screen

The power-up screen is displayed each time the QC200 is turned on. Press any
key to display the DRO screen.

The DRO screen shows the current position of the encoders on each axis.

NOTE
Some encoders require the user to move each axis across a
reference mark before the QC200 displays the DRO screen.

Adjusting LCD tilt

Adjust the tilt angle of the QC200 for comfortable viewing. If the tilt angle
cannot be adjusted, loosen the two Allen screws at the base of the enclosure and
tilt the QC200 to the desired angle. Retighten the Allen screws so the enclosure
is held firmly but can be adjusted again without loosening.

2-3

Chapter 2 Quick-Start Demonstration

Adjusting LCD contrast

Adjust the LCD contrast for optimum viewing of the DRO screen. Press the
decimal point key to decrease contrast or the +/- key to increase contrast.

Selecting measurement and display modes

Use the mode selection keys located above the numeric keypad to choose mea­surement units, datums, and display coordinates. These parameters are user
defined and depend on the application performed.

mm/inch

Use the mm/inch mode selection key to toggle the display units between milli­meters and inches. The current unit of measure is displayed in the upper right
corner of the screen.

Datum

2-4

Use the datum mode selection key to toggle between datum 1 and datum 2.
Datum 2 is a temporary datum that is useful for performing incremental mea­surements. The current datum number is displayed in the upper right corner of
the screen.

Polar/Cartesian

Use the polar/cartesian mode selection key to toggle the display between polar
and cartesian display coordinates. Select the appropriate display coordinates for
your application. See chapter 3: operation for a complete discussion of polar and
cartesian display coordinates.

Quadra-Chek® QC200

Probing methodsProbing methods

Probing methods

Probing methodsProbing methods

Probe features with crosshairs or optical edge detection. Align crosshairs on the
desired point and press enter to take points. The crosshair probe indicator ap­pears on the upper right corner of the LCD as shown.

Optical edge detection requires the user to ‘teach’ the system to detect dark-to­light or light-to-dark transitions in order to find an edge and take points. QC200s
equipped with optical edge detection display probe and teach soft key commands
at the bottom of the LCD. Press the probe soft key to toggle between crosshair
and edge detection.

To select optical edge/crosshair probe

Step 1
Press the probe soft key.

One of the following edge detector icons is displayed depending on the edge
detection mode selected by the user. The optical edge probe indicator for auto
edge detection appears on the upper right corner of the LCD as shown.

The optical edge probe indicator for manual edge detection appears on the
upper right corner of the LCD as shown.

2-5

Chapter 2 Quick-Start Demonstration

Backward/forward annotationBackward/forward annotation

Backward/forward annotation

Backward/forward annotationBackward/forward annotation

Use forward annotation to set the required number of points for each feature
type. Use backward annotation to allow the operator to determine the number
of points. When using forward annotation, the number of required points is
shown on the top left corner of the screen. As points are entered the number
counts down.

Forward annotation displays the required number of points and counts down as
points are probed.

Backward annotation starts at zero and displays the number of points as they are
taken.

2-6

Skewing the Part

Quadra-Chek® QC200

Accurate measurements require the part to be perfectly aligned on the coordi­nate measuring system. An imperfectly aligned part yields inaccurate measure­ments. Use the skew function to convert machine coordinates to part coordi­nates and compensate for part misalignment. Perform a skew each time a new
part is mounted on the measuring system.

Measure a skew line by probing a straight edge of known orientation. Use a
minimum of 2 points and a maximum of 100 when probing the line. Use more
points for greater accuracy.

NOTE
It is a good idea to clear any existing features from the features
list before skewing a new part. To clear the features list, press
the menu key, followed by the clear soft key, then press the
clear all (clr all) soft key.

NOTE
Place the part within 45 degrees of the measuring machine’s
true orientation.

To skew a part

Step 1
Press the skew key.

Step 2
Probe the first point as shown.

2-7

Chapter 2 Quick-Start Demonstration

Step 3
Press the enter key.

Step 4
Probe two more points along the line as shown. Press the enter key after each
point.

2-8

Step 5
Press the finish key.

Quadra-Chek® QC200

The skew data screen is displayed and the skew is added to the feature list. The
small skew icons displayed next to the X and Y axes indicate that the part is
mechanically misaligned. An electronic alignment is applied to the skew line to
compensate for the part skew. The skew data screen displays the electronically
aligned part coordinates NOT the actual machine coordinates. If the part is
perfectly aligned on the machine axis, the skew icons are not displayed and no
compensation is applied. In real world applications, a perfectly aligned part is
very rare. Press the view soft key for a graphic representation of the skew line.
Press the view soft key a second time to return to the skew data screen.

The part is now compensated for mechanical misalignment. This compensation
is applied to all subsequent measurements of the part.

2-9

Chapter 2 Quick-Start Demonstration

Set the Datum

All measurements are relative to the datum. The datum is the zero point or origin
of the coordinate system. Establish a datum once the part is skewed. The
simplest way to establish a datum is to zero the X and Y axes on a point. In the
example below, the skew line and a second line are used to construct a point.
Both axes (X and Y) are zeroed on that point which then becomes the datum.

The QC200 allows users to construct two reference datums for measurements.
Datum 1 is the original datum and datum 2 is a temporary datum useful for
incremental measurements. See chapter 3: operations for more details.

To construct a datum

Steps 1 through 3 measure a second line. This line and the skew line will be used
to construct a point.

Step 1
Press the line key.

Step 2
Probe a minimum of two points along the line as shown. Press the enter key after
each point.

2-10

Quadra-Chek® QC200

Step 3
Press the finish key.

The result is displayed as shown.

Steps 4 through 9 construct a point from line 2 and skew 1. See chapter 3:
operation for more information about constructions.

Step 4
Press the point key.

Step 5
Press the constr (construct) soft key.

2-11

Chapter 2 Quick-Start Demonstration

Step 6
Use the arrow keys to highlight line 2 as shown.

Step 7
Press the enter key.

A check mark appears next to the line 2 in the feature list and line 1 is now
highlighted.

NOTE
In this example, skew 1 is the next feature for the construction
so it is not necessary to move the cursor to select the next feature.
Occasionally, the user needs to use the arrow keys to highlight
the next feature for a construction. In this case the next desired
feature happens to be highlighted already.

2-12

Step 8
Press the enter key.

Quadra-Chek® QC200

Step 9
Press the finish key.

The constructed point appears in the feature list and is highlighted.

Step 10 zeros the X and Y axes on the newly constructed point. Use the zero axes
keys to establish a datum on any point feature.

Step 10
Press the zero X and zero Y axes keys. The zero X axis key is located next to the X axis
display and the zero Y axis key is located next to the Y axis display as shown.

When both axes are zeroed the screen appears as shown.

2-13

Chapter 2 Quick-Start Demonstration

Measuring Lines

The QC200 allows the user to probe up to 100 points while measuring a line. A
minimum of two points are required to measure a line. Use more points for
greater accuracy. A best-fit algorithm is applied to lines with more than two
points. The resulting F (Form) value is included in the feature data.

TT

o measure a lineo measure a line

T

o measure a line

TT

o measure a lineo measure a line

Step 1
Press the line key.

NOTE
Press the line key twice to measure a series of lines using auto
repeat.

Step 2
Probe the first point as shown.

2-14

Step 3
Press the enter key.

Quadra-Chek® QC200

Step 4
Probe two more points along the line as shown. Press the enter key after each
point.

Step 5
Press the finish key.

2-15

Chapter 2 Quick-Start Demonstration

The line feature data is displayed on the screen and added to the feature list.
Press the view soft key for a graphic representation of the line feature.

NOTE
Press the change soft key to change the best-fit algorithm used
to calculate the line if desired. Fit algorithms used by the QC200
for lines are as follows:

• LSBF: Fit determined by minimizing the sum of the

• ISO: Fit determined by minimizing the form

Press the view soft key to return to the line data screen.

squared point deviation from the form fit.

(straightness) deviation.

2-16

Measuring Circles

Quadra-Chek® QC200

A minimum of three points are required to measure a circle. The QC200 allows
the user to probe up to 100 points for circle measurements. Use more points for
greater accuracy. A best-fit algorithm is applied to circles with more than three
points. The resulting F (Form) value is included in the feature data.

To measure a circle

Step 1
Press the circle key.

NOTE
Press the circle key twice to measure a series of circles using
auto repeat.

Step 2
Probe the first point as shown.

The X and Y coordinates are displayed as shown.

Step 3
Press the enter key.

2-17

Chapter 2 Quick-Start Demonstration

Step 4
Probe three more points along the edge of the circle. Press the enter key after each
point.

NOTE
Space points approximately 90 to 120 degrees apart for best
results.

The X and Y coordinates are displayed after each point as shown.

2-18

Step 5
Press the finish key.

Quadra-Chek® QC200

The circle feature data will be displayed on the screen and the feature is added to
the feature list.

The circle feature data is displayed on the screen and added to the feature list.
Press the view soft key for a graphic representation of the circle feature.

NOTE
Press the change soft key to change the best-fit algorithm used
to calculate the circle if desired. Fit algorithms used by the
QC200 for circle are as follows:

• LSBF: Fit determined by minimizing the sum of the

squared point deviation from the form fit.

• ISO: Fit determined by minimizing the form

(straightness) deviation.

• Outer: Yields the biggest circle.

• Inner: Yields the smallest circle.

Press the view soft key to return to the circle data screen. Use the zero axes key next
to the diameter/radius display to toggle the display between diameter and radius.

2-19

Chapter 2 Quick-Start Demonstration

Tolerancing

The following tolerances are available on the QC200:

NOTE
Use the following example to learn how to perform tolerances
with the QC200. See chapter 3: operation for complete
information.

2-20

To perform a true position tolerance on a circle

NOTE
True position tolerancing is shown as RFS (regardless of feature
size) tolerancing on QC200 software versions 1.20 - 1.22.

Step 1
Highlight a circle in the features list as shown.

Quadra-Chek® QC200

Step 2
Press the tol soft key.

Step 3
Press the positional tolerance (pos) soft key to perform a positional tolerance.

Step 4
Press the true position (TP) soft key.

Step 5
Use the numeric keypad to enter the nominal values for X and Y.

NOTE
Until the user enters nominal values, the QC200 displays the
actual coordinates in the nominal X and Y fields.

2-21

Chapter 2 Quick-Start Demonstration

Step 6
Enter the nominal diameter.

Step 7
Enter the tol zone of the circle as shown.

2-22

NOTE
The tol zone (tolerance zone) of the circle is the radius within
which the center point of the circle must be. If the center point
lies outside this radius the tolerance will fail.

Quadra-Chek® QC200

Step 8
Select limits or +/-.

NOTE
Use the limits field to set upper and lower limits on a value. For
example, a nominal value of 10.3250 mm might have an upper
limit of 10.3260 mm and a lower limit of 10.3240 mm. Select
+/- to enter the actual tolerance value. For example, if a part
drawing gives a +/- tolerance of 0.05 mm, simply enter 0.05
mm in the plus and minus fields. This example uses +/-.

Step 9
Enter the diameter tolerance (+/-) or limits.

Step 10
Press the finish key.

2-23

Chapter 2 Quick-Start Demonstration

The results for the tolerance are displayed as shown. Features that pass the
tolerance are displayed with a check mark as shown.

Failed features are displayed with a circled X and hollow fonts as shown.

2-24

Using the QC200

Chapter 3
Operation

The QC200 measures features based on point data received from a measuring
system. For example, the QC200 measures the diameter/radius of a circle based
on a series of points from the crosshairs (or optical edge detector) of an optical
comparator.

In general, users simply enter a series of points and the QC200 applies the
appropriate geometric calculations to each feature. Use this chapter to learn how
to operate the QC200 and maximize its capabilities.

Demonstrations in this chapter use the Metronics ‘quickie’ slide to demonstrate
typical two-dimension (X and Y axes) inspection.

NOTE
Expect variations between the measurement results illustrated
in this chapter and actual end user QC200 results. The
measurements shown are to demonstrate general operating
principles under typical circumstances.

Use the QC200 to perform precise measurements of physical part geometries.
Part measurement includes:

• fixturing and securing the part on the inspection surface

• compensating for part misalignment in the fixture

• establishing a datum

• probing part geometry, collecting points, and applying geometric calcu

lations

3-1

Chapter 3 Operation

Getting Started

Safety Reminders

Read and understand all safety and operating instructions before operating the
QC200. To complete the tasks described in this chapter, users must understand
the inspection process, the measuring device used, and the controls, indicators,
and information presented on the QC200 display.

NOTE
Operators are required to understand part fixturing and probing
techniques that apply to the measuring device connected to the
QC200.

Location and mountingLocation and mounting

Location and mounting

Location and mountingLocation and mounting

Mount the QC200 on a stable surface. If it falls, serious damage or injury can
result.

Power cord and plug

Do not locate the power cord where it can be walked on or create a tripping
hazard. Connect the 3-wire power plug to a 3-wire grounded outlet only. Do
not attempt to adapt or remove the 3rd ground wire to fit the plug in 2-wire
electrical outlet. Modifying or overriding these features creates a safety hazard
and should not be permitted.

Power surge suppressor

Use a high-quality power surge suppressor to limit the amplitude of potentially
damaging power line transients caused by electrical machinery or lightning. The
surge suppressor found on inexpensive power strips is insufficient to protect the
QC200 from damage.

3-2

Liquids

Do not spill or splash liquids on the QC200 enclosure.

Checking connections

Perform routine inspections on all connections to the digital readout system.
Keep connections clean and tight. Locate cables away from moving objects. Do
not create tripping hazards with the power cords and connection cables.

Use shielded cables to connect to the parallel and serial (RS-232) output ports.
Make certain cables are properly terminated and firmly connected on both ends.

CAUTION
Never connect the power cable to the QC200 with the power
switch in the ON position. Optical edge detector cables may be
connected or disconnected without placing the switch in the
OFF position.

Applying power

Quadra-Chek® QC200

Configuration & System Setup

Only qualified supervisors and dealer representatives should perform system
configuration and setup. Operators should not attempt to alter the configura­tion of the QC200.

Move the power switch located on at the back of the QC200 to the ON posi­tion. The system initializes and displays the power-up screen.

PowerPower

Power

PowerPower

The power-up screen is displayed each time the QC200 is turned on.

Press any key to display the DRO screen. The DRO screen shows the current
position of the encoders on each axis.

-up screen-up screen

-up screen

-up screen-up screen

NOTE
Some encoders require the user to move each axis across a
reference mark before the QC200 displays the DRO screen.

3-3

Chapter 3 Operation

Adjusting LCD tilt

Adjust the tilt angle of the QC200 for comfortable viewing. If necessary, loosen
the two Allen screws at the base of the enclosure and tilt the QC200 to the
desired angle. Tighten the Allen screws so the enclosure is held firmly but can be
adjusted again without loosening.

Adjusting LCD contrast

Adjust the LCD contrast for optimum viewing of the DRO screen. Press the
decimal point key to decrease contrast or the +/- key to increase contrast.

3-4

Controls & Display

Quadra-Chek® QC200

There are several types of keys (buttons) located on the front of the QC200.

• mode selection

• feature selection

• command keys

• soft keys

• fast keys

• arrow keys

• numeric keypad

• display on/off

Mode selection keys

There are four mode selection keys located above the numeric keypad:

• mm/inch

• datum

• polar/Cartesian

• help

3-5

Chapter 3 Operation

mm/inch

Use the mm/inch mode selection key to toggle the display units between milli­meters and inches. The current unit of measure is displayed in the upper right
corner of the screen.

Datum

Use the datum mode selection key to toggle between datum 1 and datum 2.
The current datum number is displayed in the upper right corner of the screen.

Polar/Cartesian

Use the polar/cartesian mode selection key to toggle between polar and cartesian
display coordinates.

3-6

All points probed with the QC200 exist within a coordinate system. Coordinate
systems are simply a way of describing the location of a point or points in a given
space. More importantly, the coordinate system determines how the QC200
displays measurements.

There are two kinds of coordinate systems used by the QC200: polar coordi­nates and cartesian coordinates. Users can select the coordinate system appropri­ate for their specific application.

Cartesian coordinates describe the locations of points as linear distances from the
datum. For example, a point with the coordinates (2,3) is located 2 units from
the datum along the X axis and 3 units from the datum along the Y axis.

Quadra-Chek® QC200

Polar coordinates describe the locations of points as a radial distance and angle
from the datum. For example, a point given as (2, 60 degrees) is located by
following a 2 unit radial distance from the datum (pole) at an angle of 60
degrees.

Help

Press the help mode selection key to display help topics on the screen. Help
topics explain the how to use the current QC200 function.

Feature selection keys

There are seven feature selection keys located beneath the soft keys on the
QC200. Use feature selection keys to measure and calculate features, skew parts,
and activate Measure Magic.

NOTE
Use auto repeat to perform a series of measurements on a specific
feature type. For example, use auto repeat for a series of circle
measurements. Activate auto repeat by pressing the desired
feature selection key twice. Auto repeat is allowed for point,
line, circle, distance, angle, and measure magic measurements.

Point

Press the point key once to measure one point, or twice to use auto repeat to
measure a series of points. One data point is required to measure a point.

Line

Press the line key once to measure one line, or twice to use auto repeat to measure
a series of lines. A minimum of two (max. 100) data points are required to
measure a line.

3-7

Chapter 3 Operation

Circle

Press the circle key once to measure one circle, or twice to use auto repeat to
measure a series of circles. A minimum of three (max. 100) data points are
required to measure a circle.

Distance

Press the distance key once to measure one distance, or twice to use auto repeat to
measure a series of distances. Two points are required to measure a distance.

Angle

Press the angle key once to measure one angle, or twice to use auto repeat to
measure a series of angles. A minimum of two (max. 100) data points are
required to measure each leg of an angle.

3-8

Skew

Press the skew key to compensate electronically for non-square part alignment.

Measure Magic

Press the measure magic key to automatically measure any geometric feature or
twice to measure a series of like features. Enter the desired points and measure
magic analyzes the data to determine the feature type.

Quadra-Chek® QC200

Soft keys

There are five soft keys located beneath the LCD display. Soft keys correspond
to the functions that appear above each key at the bottom of the LCD display.

For example, the soft keys above correspond to the setup, program (prog), extra,
clear, and edge functions.

Command keys

There are four command keys located beneath the numeric keypad: enter, finish,
cancel, and quit.

Enter

Press the enter key to enter points during feature measurements. The enter key is
also used to enter data into input fields such as on a setup screen. See chapter 7:
setup for more information. In general the enter key indicates that data, from a
measurement or in a field, is ready for use. Users typically press the enter key to
enter each point in a measurement.

Finish

Press the finish key to complete feature measurements. Pressing the finish key a
second time returns the user to the DRO screen. Users typically press the finish
key after the final point in a measurement is entered.

3-9

Chapter 3 Operation

Cancel

Press the cancel key to erase the last point entered. The cancel key is also used to
erase data in input fields such as on a setup screen or delete any highlighted
feature from the feature list.

Quit

Press the quit key to abandon the current task and return to the DRO screen. Use
the quit key to exit the feature list also.

Arrow keys

There are four arrow keys located beneath the menu button. Use the arrow keys
to scroll through lists and navigate menus. The up arrow key is the same as the
construction (constr) soft key when pressed after a feature selection key. For ex­ample, press the circle key and then the up arrow key to construct a circle.

3-10

Zero axes keys

There are three zero axes keys located to the right of the LCD display. Press the
zero axis key adjacent the desired axis to zero it.

Quadra-Chek® QC200

Fast track keys

There are two programmable fast track keys located above the LCD display. By
default the left fast track key is the same as the enter key and the right is the same
as the finish key. Users can program either fast track key to perform any fre-
quently used functions. These keys are easily located by touch without taking
your eyes off the part.

Numeric keypad

Use the numeric keypad to enter numeric data. Additionally, the decimal point
key and +/- key are used to adjust the contrast of the LCD display. For more

information on adjusting contrast, see the system setup & configuration section of
chapter 2.

3-11

Chapter 3 Operation

Send/print

Press the send/print key to transmit measurement results to a computer or printer.

LCD on/off

Press the LCD on/off button to shut down the LCD display without removing
power from the QC200. Press the button a second time to restore the LCD
display.

3-12

Menu key

Press the menu key to view additional soft key menus. There are five menus to
choose from: setup, program (prog), extra, clear, and edge. The options contained in
each of these menus is discussed in the next section: menus.

Menus

Quadra-Chek® QC200

Setup menu

Press the setup menu soft key to access the QC200 setup screens.

Supervisors and dealer representatives use the setup menu to configure measure­ment, display, and communication parameters of the QC200. Use the arrow
keys to highlight the desired setup screen. In the example below, the about setup
screen is highlighted. See chapter 7: setup for more information about the various
setup screens.

NOTE
Setup and system configurations should be changed only by
qualified personnel.

Program (prog) menu

Press the program (prog) soft key to access the QC200 program screen.

3-13

Chapter 3 Operation

The program menu contains a list of programs created by the user. Programs are
prerecorded sequences of key-presses and measurements. Highlight the desired
program in the list and press the run soft key to run a program.

Recording programs is discussed in chapter 4.

Extra menu

Press the extra soft key to display the extra menu.

3-14

The extra menu contains a list of additional functionality. Use the up and down
arrow keys to highlight items in the extra menu list. Press the enter key to select
the highlighted item. A brief explanation of each function is given below.

Annot

Highlight annotation (annot) in the menu list to toggle between backward and
forward annotation.

Quadra-Chek® QC200

DMS/DD

Toggles the display of angles between degrees, minutes and seconds and decimal
degrees.

MCS
Highlight MCS to clear datums and re-establish machine coordinates.

NOTE
Previous datums cannot be recovered once machine coordinates
are re-established.

MinMax
Highlight MinMax to collect minimum and maximum point values until the
finish key is pressed. Use MinMax for touch-probe measurements of runout.

Preset

Highlight preset to preset an axis or axes to a desired feature or location. Use the
preset function to measure features that are datumed on another part. Typically
this is required for component parts of larger assemblies. Another use for the
preset function is to find the offset between the nominal and actual location of a
preset feature.

Preset!

Sets the axis or axes to the last entered preset location.

Run! (run last program)
Highlight run! to run the last program again.

NOTE
All send data menu items send data to the RS-232 port. These
commands do not send data through the parallel port.

Send 2
Select send 2 to send the current X and Y axes data to a printer or computer.

Send D
Select send D to send the current diameter data to a printer or computer.

Send L
Select send L to send the current length data to a printer or computer.

Send r
Select send r to send the current radius data to a printer or computer.

3-15

Chapter 3 Operation

Send X
Select send X to send the X axis data to a printer or computer.

Send Y
Select send Y to send the Y axis data to a printer or computer.

Send <
Select send < to send angle measurement data to a printer or computer.

Time

Displays the current date and time.

Zero 2

Zeroes both X and Y axes in the current datum.

Clear menu

Press the clear menu soft key to display the clear function soft keys.

3-16

Press the clear feature (clr ft) soft key to erase all features from the feature list. Press
the clear skew (clr sk) soft key to erase all skew features from the system. Press the
clear all (clr all) soft key to erase features and skews from the system.

Quadra-Chek® QC200

Edge menu

Pressing the edge soft key to display the edge detector soft keys.

There are five edge detector soft keys:

Teach

Use the teach soft key to ‘teach’ the edge detector to recognize light-to-dark or
dark-to-light transitions.

D cal

Distance calibrations (d cal) are performed by supervisors or dealer representa­tives during the installation of edge detector systems. Users should not use the

d cal soft key unless directed to by qualified personnel.

Install

Supervisors and dealer representatives use the install soft key to install the edge
detector system. Users should not use the install soft key unless directed to by
qualified personnel.

X cal

Cross calibrations (x cal) are performed by supervisors or dealer representatives
during the installation of edge detector systems. Users should not use the x cal

soft key unless directed to by qualified personnel.

Auto e

Use the auto e soft key to toggle auto edge detection on and off when edge
detection is used in place of crosshairs.

3-17

Chapter 3 Operation

LCD screens

The digital readout (DRO) screen shows the location of the axes prior to measur­ing a feature.

Once the feature is measured there are two basic types of screens displayed by the
QC200: data screens and graphic screens.

3-18

Both data and graphic screens are associated with a feature. For example, there
are circle data screens and circle graphic screens as shown above.

Screens displayed when probing or constructing features are referred to by their
respective titles. For example, there are probe angle and construct point screens.

Quadra-Chek® QC200

DRO screenDRO screen

DRO screen

DRO screenDRO screen

The DRO screen shows the current positions of axes, current units (mm/inch),
current datum, current probe (crosshair or edge detector), and the feature list.
Soft key assignments may or may not be shown across the bottom of the screen.

Data screens

Data screens display numeric feature data. Information on data screens includes
feature type, number, polar or cartesian coordinates, number of points probed,
and form (f ) value.

There are four soft keys displayed on a data screen: recall, view, change, and
tolerance (tol).

Press the recall soft key to view the data screen of another feature.

3-19

Chapter 3 Operation

Press the view soft key to toggle the screen between data and graphic screens.

Press the change soft key to select the desired algorithm used to calculate the
feature.

Press the tolerance (tol) soft key to perform a tolerance on the feature.

3-20

Graphic screens

Graphic screens display a graphic feature and numeric data. Information on
graphic screens includes the data points measured and the best-fit geometry
calculated for those points.

Numeric data displayed on graphic screens is identical to the data screen. Addi­tional information includes form values and the algorithm used to calculate the
feature.

Quadra-Chek® QC200

There are five soft keys displayed on a graphic screen: recall, view, change, zoom,
and tolerance (tol).

Press the recall soft key to view the data screen of another feature.

Press the view soft key to toggle the screen between data and graphic.

Press the change soft key to select the desired algorithm used to calculate the
feature.

NOTE
Features measured with the minimum required points are
calculated using LSBF only. No other algorithm can be chosen.
Additional points are required to calculate with any other
algorithm.

NOTE
Features measured with measure magic have different change
soft key options. For example, press the change soft key to
change the type of feature from line to circle.

3-21

Chapter 3 Operation

Press the zoom soft key to zoom in/out of the graphic feature image.

Press the increase (inc) soft key to zoom in on the graphic feature image. Press the
decrease (dec) soft key to zoom out.

Press the tolerance (tol) soft key to perform a tolerance on the feature.

3-22

Features

Probing Features

Quadra-Chek® QC200

Features consist of data points obtained by probing the geometry of the part.
For example, several points probed along the perimeter of a circle generate a
graphic and numeric representation of the measured circle geometry. In this
guide, a measured geometry is referred to as a feature. Features are displayed
graphically or numerically on the QC200. There are several types of features and
each has different distinguishing information. For example, a circle has a center
and a radius, a point has a location, and an angle has degrees.

Features list

Each feature is added to the features list when it is measured. The features list is
simply a listing of all features measured in a given session. It is displayed on the
left-hand side of the LCD screen and is visible in DRO and measuring modes.
Features are identified by number and an icon indicating its type (i.e. circle, line,
etc.). Up to 200 features can be added to the features list. Use the up and down
arrow keys to scroll through the list. Highlight the desired feature to recall, print,
or send the feature data to a computer. Select features from the features list to
construct new features. Users can also delete individual features or the entire list.
In general, the user should delete old features, datums, and skews from the
features before each new inspection.

There are two probing methods used to collect data points for the QC200:
crosshairs and optical edge detection. To collect points using crosshairs, align the
crosshairs over the desired point and press the enter key. Optical edge detection
takes points at light-to-dark (or dark-to-light) transitions. When an edge is
crossed the QC200 beeps. Press the enter key to accept the point. Systems
equipped with auto-edge detection enter points automatically when an edge is
detected.

NOTE
This guide refers to the process of measuring points as probing
points or measuring features regardless of the probing method
used.

3-23

Chapter 3 Operation

Probing TProbing T

Probing T

Probing TProbing T

Probe features with crosshairs or optical edge detection. Align crosshairs on the
desired point and press enter to take points. The crosshair probe indicator ap­pears on the upper right corner of the LCD as shown.

Optical edge detection requires the user to ‘teach’ the system to detect dark-to­light or light-to-dark changes in order to find an edge and take points. QC200s
equipped with optical edge detection display probe and teach soft key commands
at the bottom of the LCD. Press the probe soft key to toggle between crosshair
and edge detection.

To select optical edge/ crosshair probe

Step 1
Press the probe soft key.

The auto edge detection icon is shown on the left and the crosshair icon is on the
right. The icon displayed indicates the current selection.

echniqueechnique

echnique

echniqueechnique

3-24

Quadra-Chek® QC200

To toggle between auto edge and manual edge detec­tion

Step 1
Press the menu key.

Step 2
Press the edge soft key.

Step 3
Press the auto edge (auto e) soft key.

The auto edge detection icon is shown on the left and the manual edge detection
icon is on the right. The icon displayed indicates the current selection.

3-25

Chapter 3 Operation

Backward/forward annotationBackward/forward annotation

Backward/forward annotation

Backward/forward annotationBackward/forward annotation

Use forward annotation to require a specified number of points for each feature
type. Use backward annotation to allow the operator to determine the number
of points. When using forward annotation, the number of required points is
shown on the top left corner of the screen. As points are entered the number
counts down. Backward annotation displays the number of points as they are
entered. Some users prefer forward annotation because it sets a uniform num­ber of points for feature measurements. For example, forward annotation can
be set to require 4 points when measuring a circle instead of the minimum three
points. Since the QC200 expects a certain number of points using forward
annotation the system automatically displays the feature after the last required
point is entered. It is not necessary to press the finish key in forward annotation
measurements.

NOTE
Operators can toggle between backward and forward
annotation with the procedure below. Use the measure setup
screen to set the required number of points for forward
annotation. See chapter 7: setup for more information.

To select backward/forward annotation

Step 1
Press the menu key.

3-26

Step 2
Press the extra soft key.

Quadra-Chek® QC200

Step 3
Use the arrow keys to highlight annot (annotation) in the list as shown.

Step 4
Press the enter key.

Forward annotation displays the required number of points as shown.

NOTE
This example of forward annotation required four points. For
space reasons the measuring sequence is shown from three
points. The total number of points is given on the last screen.

3-27

Chapter 3 Operation

Backward annotation displays the number of points as they are taken.

3-28

Quadra-Chek® QC200

If a feature requires a few additional points to ensure accuracy, press the bottom
zero axis key to increase the required number of points for that measurement.
Increasing the required points with the zero axis affects only the current measure­ment. Subsequent measurements will require the number of points defined on
the measure setup screen. See chapter 7: setup for more information.

To increase the required number of points (forward
annotation only)

Step 1
Press the desired feature selection key.

NOTE
This example shows a circle measured with forward annotation
but the basic procedure is the same for any feature measured
with forward annotation.

Step 2
Press the bottom zero axis key as shown.

The number of required points increases by one for each key press.

Begin the measurement when the desired number of required points is set.

3-29

Chapter 3 Operation

Skewing the part

Accurate measurements require the part to be perfectly aligned on the coordi­nate measuring system. An imperfectly aligned part yields inaccurate measure­ments. Use the skew function to convert machine coordinates to part coordi­nates and compensate for part misalignment. Measure a skew each time a new
part is mounted on the measuring system.

Measure a skew line by probing a straight edge of known orientation. Use a
minimum of 2 points and a maximum of 100 when probing the line. Remem­ber that more points means greater accuracy.

Construct a skew line from previously measured features. For example, con­struct a skew line using two circles. Keep in mind that the more points probed
on features used in the construction of a skew line, the greater the accuracy.

NOTE
Place the part within 45 degrees of the measuring machine’s
true orientation.

To skew a part

Step 1
Press the skew key.

3-30

Step 2
Probe the first point as shown.

Step 3
Press the enter key.

Quadra-Chek® QC200

Step 4
Probe two more points along the line. Press the enter key after each point.

Step 5
Press the finish key.

The skew data screen is displayed and the skew is added to the feature list. Small
skew icons are displayed next to the X and Y axes display. Press the view soft key
for a graphic representation of the point feature. Press the view soft key a second
time to return to the skew data screen.

The part is now compensated for mechanical misalignment. This compensation
is applied to all subsequent measurements of the part.

3-31

Chapter 3 Operation

DatumDatum

Datum

DatumDatum

All measurements are relative to a datum. A datum is the zero point or origin of
the coordinate system. Establish a datum once the part is skewed. The simplest
way to establish a datum is to zero the X and Y axes on a point. In the example
below, the skew line and a second line are used to construct a point. Both axes (X
and Y) are zeroed on that point which then becomes the datum. Datum points
can be constructed from the center point of a circle or any other construction that
produces a point. Generally the datum, or the features used to construct the
datum, are called out on a part drawing.

The QC200 allows users to construct two reference datums for measurements.
Datum 1 is the original datum and datum 2 is a temporary reference frame useful
for incremental measurements. Use datum 2 for incremental measurement while
maintaining the position of datum 1. For example, obtain the incremental dis­tance (X axis travel) of a series of features. Probe a point on the first feature and
establish it as datum 2. Place the crosshairs on the next feature in the series and
measure a point. The X axis displays the distance from the first feature to the
second. Now establish datum 2 on the point on the second feature. Place the
crosshairs on the third feature and measure a point. The X axis now displays the
distance from the second feature to the third. Continue in this fashion until the
entire series measured.

To construct a datum

3-32

Steps 1 through 3 measure a second line. This line and the skew line will be used
to construct a point.

Step 1
Press the line key.

Quadra-Chek® QC200

Step 2
Probe a minimum of two points along the line as shown. Press the enter key after
each point.

Step 3
Press the finish key.

The result is displayed as shown.

Steps 4 through 9 construct a point from line 2 and skew 1. See chapter 3:
operation for more information about constructions.

3-33

Chapter 3 Operation

Step 4
Press the point key.

Step 5
Press the constr (construct) soft key.

Step 6
Use the arrow keys to highlight line 2 as shown.

3-34

Step 7
Press the enter key.

Quadra-Chek® QC200

A check mark appears next to the line 2 in the feature list and line 1 is now
highlighted.

NOTE
In this example, skew 1 is the next feature for the construction
so it is not necessary to move the cursor to select the next feature.
Occasionally, the user needs to use the arrow keys to highlight
the next feature for a construction. In this case the next desired
feature happens to be highlighted already.

Step 8
Press the enter key.

Step 9
Press the finish key.

The constructed point appears in the feature list and is highlighted.

Step 10 zeros the X and Y axes on the newly constructed point. Use the zero axes
keys to establish a datum on any point feature.

3-35

Chapter 3 Operation

Step 10
Press the zero X and zero Y axis keys.

When both axes are zeroed the screen appears as shown.

3-36

The datum is complete.

Measuring Features

Quadra-Chek® QC200

Use the measurement procedures in this section to measure points, lines, circles,
angles, and distances. To measure a feature, press the desired feature selection
key, probe the required points, and press the finish key. For example, to measure
a circle press the circle key, probe a minimum of three points, and press the finish
key.

Use auto repeat to measure several features of the same type (such as a series of
lines). Press the desired feature selection key twice to activate auto repeat. For
example, press the circle key twice to measure a series of circles. When auto repeat
is selected the probe feature screen becomes the probe features screen. For example,
the probe circle and probe circles screens are shown below.

Use auto repeat and forward annotation to speed up repetitive inspections. For
example, an inspection of a dozen circles requires the user to press the circle key
before measuring each circle and press the finish key for each measurement. The
same inspection using auto repeat and forward annotation requires the user to
press circle key twice before and the finish key once after measuring all 12 circles.
Pressing the finish key turns off auto repeat.

3-37

Chapter 3 Operation

Measuring points

Points are the simplest features to probe. Only one point is required to define the
location. A maximum of two points can be probed to measure a single point.
The QC200 averages the points to produce the resulting point feature.

To measure a point

Step 1
Press the point key.

NOTE
Press the point key twice to measure a series of points using
auto repeat.

Step 2
Probe the first point as shown.

3-38

Step 3
Press the enter key.

Step 4
Press the finish key.

The point feature data is displayed on the screen and added to the feature list.
Press the view soft key for a graphic representation of the point feature.

Quadra-Chek® QC200

Measuring lines

The QC200 allows the user to probe up to 100 points while measuring a line. A
minimum of two points are required to measure a line. Use more points for
greater accuracy. A best-fit algorithm is applied to lines with more than two
points to determine location. The resulting F (Form) value is included in the
feature data.

TT

o measure a lineo measure a line

T

o measure a line

TT

o measure a lineo measure a line

Step 1
Press the line key.

NOTE
Press the line key twice to measure a series of lines using auto
repeat.

Step 2
Probe the first point as shown.

Step 3
Press the enter key.

Step 4
Probe two more points along the line. Press the enter key after each point.

3-39

Chapter 3 Operation

The display shows the points as they are entered.

Step 5
Press the finish key.

The line feature data is displayed on the screen and added to the feature list.
Press the view soft key for a graphic representation of the line feature.

3-40

NOTE
Press the change soft key to change the best-fit algorithm used
to calculate the line if desired. Fit algorithms used by the QC200
for lines are as follows:

• LSBF: Fit determined by minimizing the sum of the

squared point deviation from the form fit.

• ISO: Fit determined by minimizing the form

(straightness) deviation.

Press the view soft key to return to the line data screen.

Quadra-Chek® QC200

Measuring circles

A minimum of three points are required to measure a circle. The QC200 allows
the user to probe up to 100 points for circle measurements. Use more points for
greater accuracy. A best-fit algorithm is applied to circles with more than three
points. The resulting F (Form) value is included in the feature data.

To measure a circle

Step 1
Press the circle key.

NOTE
Press the circle key twice to measure a series of circles using
auto repeat.

Step 2
Probe the first point as shown.

The X and Y coordinates are displayed as shown.

Step 3
Press the enter key.

3-41

Chapter 3 Operation

Step 4
Probe three more points along the edge of the circle. Press the enter key after each
point.

NOTE
Space points approximately 90 to 120 degrees apart for best
results.

The X and Y coordinates are displayed after each point as shown. Only points
three and four are shown for space reasons.

3-42

Step 5
Press the finish key.

Quadra-Chek® QC200

The circle feature data is displayed on the screen and added to the feature list.
Press the view soft key for a graphic representation of the circle feature.

NOTE
Press the change soft key to change the best-fit algorithm used
to calculate the circle if desired. Fit algorithms used by the
QC200 for circle are as follows:

• LSBF: Fit determined by minimizing the sum of the

squared point deviation from the form fit.

• ISO: Fit determined by minimizing the form

deviation.

• Outer: Yields the biggest circle.

• Inner: Yields the smallest circle.

Press the view soft key to return to the circle data screen. Use the zero axes key next
to the diameter/radius display to toggle the display between diameter and radius.

3-43

Chapter 3 Operation

Measuring distances

Distances are actually relationships between two features. Two points are re­quired to measure a distance. Users can probe two points to measure a distance
but it is more common to construct a distance from previously measured fea­tures. For example, the distance between two circles. Measuring a distance by
probing two points follows essentially the same as measuring a line. Since real life
applications tend to require distances between previously measured features, this
example shows how to construct a distance from two circles. See the constructions
section of this chapter for more details.

NOTE
Make sure there are two circles in the features list before
attempting this demonstration.

To construct a distance between two circles

Step 1
Press the distance key.

3-44

Step 2
Use the arrow keys to highlight the first circle in the features list as shown.

Step 3
Press the enter key.

Quadra-Chek® QC200

Step 4
Highlight the second circle in the features list as shown.

Step 5
Press the enter key.

Step 6
Press the finish key.

The distance feature data is displayed on the screen and added to the feature list.
The distance results screen displays the length of the distance as L and shows the
distance traveled by the X and Y axes. Press the view soft key for a graphic
representation of the distance feature.

Notice the information displayed beneath the length result. The number of
features used in the construction is shown as: Fts = 2. This means that two
features were used in the current construction. Beneath the number of features
is a line that reads: From 5,4. This means that features 5 and 4 from the features
list were used in the current construction.

3-45

Chapter 3 Operation

Measuring angles

Angles are measured by probing points on the two lines (legs) that make up the
angle. Up to 100 points can be probed on each line. A minimum of two points
(per leg) is required. Use more points for greater accuracy. When more than two
points are probed on any line, a best-fit algorithm determines the location of the
line and a form (F ) value is calculated the line. Angles can also be constructed
from previously measured features.

To measure an angle

Steps 1 through 5 measure the first leg of the angle.

Step 1
Press the angle key.

NOTE
Press the angle key twice to measure a series of angles using
auto repeat.

Step 2
Probe the first point as shown.

3-46

The probe angle screen is displayed as shown.

Step 3
Press the enter key.

Quadra-Chek® QC200

Step 4
Probe the second point as shown in step 2. Press the enter key to enter the point.

Step 5
Press the finish key.

The first leg of the angle is displayed in the features list as shown.

Steps 6 through 9 measure the second leg of the angle and complete the angle
measurement.

Step 6
Probe the first point on the second leg as shown.

3-47

Chapter 3 Operation

The probe angle screen is displayed as shown.

Step 7
Press the enter key.

Step 8
Probe the second point on the second leg as shown in step 6. Press the enter key
to enter the point.

3-48

Step 9
Press the finish key.

The angle feature data is displayed on the screen and added to the feature list.
Press the view soft key for a graphic representation of the angle feature.

Quadra-Chek® QC200

Press the change soft key to select a different angle result. There are four possible
results from any angle measurement. The included angle is the default result.
Use the illustration below to help you choose the desired angle result.

The illustrations below show how the different angles appear on the screen.

3-49

Chapter 3 Operation

Using Measure Magic

Measure magic is a time saving feature that recognizes the geometric pattern of
data points. Use measure magic to automatically measure point, line, and circle
features. To use measure magic, press the measure magic key, probe the desired
points, and press the finish key. Measure magic analyzes the points and calculates
the desired feature.

Probe additional points on each feature to get the best results when using mea­sure magic. It also helps to space the points evenly around the feature geometry.
Sound probing and inspection technique ensures accurate results from measure
magic.

Use auto repeat and measure magic to measure a series of features of any type. For
example, use auto repeat and measure magic to measure a point, a line, and a circle.
Using measure magic, the operator can quickly move from one feature to the
next. Simply enter the points, press the finish key, and move on to the next
feature.

Press the measure magic key twice to activate auto repeat. When auto repeat is
selected the probe feature screen becomes the probe features screen as shown below.

3-50

Use auto repeat and measure magic to speed up inspections. For example, an
inspection of a variety of point, line, and circle features. Even inspections with
distances and angles can be sped up with measure magic. Simply measure point,
line, and circle features with measure magic and use them to construct the re­quired angles and distances.