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 Inc., Bedford, New Hampshire.
Terms, conditions and features referenced in this document are subject to change without notice.
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 prior written permission of Metronics, Inc.. Requests to Metronics, Inc. for permission should be addressed to the Technical
Services Department, Metronics, Inc., 30 Harvey Road, Bedford, New Hampshire 03110.
Limit of liability and disclaimer of warranty
While this guide was prepared with great care, Metronics makes no representations or warranties with
respect to the accuracy or completeness of the contents of this book and specifically disclaims any implied
warranties of merchantability or fitness for a particular purpose. The advice, methods and instructions
contained in this book might not be suitable for your situation. When in doubt regarding suitability, you
are encouraged to consult with a professional where appropriate. Metronics shall not be liable for any loss
of profit or any damages, including but not limited to special, incidental, consequential or other damages.
Trademarks
Metronics and QC-300 are registered trademarks of Metronics, Inc. and its subsidiaries in the United States
and other countries.
Conventions & Terms
QC-300 refers to any of the QC-300 series of instruments. System refers to the QC-300 and the measuring
devices connected to it.
Icons
This guide uses the following icons to highlight information:
WARNINGS
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.
DANGEROUS VOLTAGE
The lightning icon warns of the presence of an uninsulated dangerous voltage within
the product enclosure that might be of sufficient magnetude to cause serious shocks or
death. Do not open the enclosure unless you are a qualified service person approved
by Metronics, Inc., and never open the enclosure while power is connected.
CAUTIONS & IMPORTANT INFORMATION
The exclamation point icon indicates important information regarding equipment
operation or maintentance, or a situation or condition that can lead to equipment
malfunction or damage. Do not proceed until the information is read and thoroughly
understood.
NOTE
The note icon indicates additional or supplementary information about an activity or
concept.
Safety & Maintenance Considerations
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.
Safety information is also included on the next page and in Chapter 2: Installation.
WARNINGS
Disconnect the QC-300 from power before cleaning.
The QC-300 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
accessories that remove the third grounded connection such as a 2-wire power plug adapter create
a safety hazard and should not be permitted. If a 3-wire grounded outlet is not available, ask your
electrician to provide one.
DANGEROUS VOLTAGE
Do not open the enclosure unless you are a qualified service person approved by
Metronics, Inc., and never open the enclosure while power is connected. There are no
user-serviceable components or assemblies inside. Refer servicing to qualified service
personnel.
General Maintenance
Disconnect the QC-300 from power 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 QC-300 has been dropped or the exterior has been damaged
• The QC-300 exhibits degraded performance or indicates a need for service some other way
Cleaning the enclosure
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. Instructions for cleaning the touch screen are different and are given below.
Cleaning the touch screen
The touch screen should be cleaned as described below to prevent scratching or wearing the screen surface
and to prevent liquids from leaking into the enclosure.
Use only a soft, lint-free cloth dampened with water for cleaning the touch screen. Never use abrasive
cloths or paper towels. Never use abrasive cleaners, and never use detergents or solvents. Only dampen
the cloth, do not use a cleaning cloth that is dripping wet. Never spray the screen.
If the screen is badly soiled, the cloth can be dampened with a 50:50 mixture of isopropyl alcohol and
water. Remember, only dampen the cloth, do not use a cleaning cloth that is dripping wet, and never spray
the screen.
Contents
Chapter 1 Overview
Overview of QC-300 features and functions ...................................................1
Chapter 2 Installation
Unpacking the QC-300 ....................................................................................5
Assembling the mounting stand .......................................................................6
Reference Features ....................................................................................300
Least squares best fit .................................................................................300
Maximum inscribed circle ........................................................................300
Minimum superscribed circle ...................................................................300
ISO (least radial distance) .........................................................................300
Contents 13
Chapter 14 Options
List of product options .....................................................................................301
Contents 14
QC-300 Series User’s Guide
1
Chapter 1:
Overview
The Quadra-Chek 300 series is a family of advanced digital readout systems for performing 2, 3 and 4
axis measurements at very high levels of precision and accuracy. Dimensional inspection of components
can be made using toolmaker’s microscopes and video measurement systems as part of in-line production
activities or final quality inspection.
Feature points are entered manually using crosshairs or video edge detection, or automatically using the
multiple video edge detection probe. Feature type can automatically be determined by the system when
using Measure Magic. Part level and skew compensation can be performed on misaligned parts prior to
measurements that eliminates the need for time-consuming fixturing.
Sequences of key-presses used to perform measurements can be recorded and stored as programs. These
programs can be replayed later to perform complete measurement sequences. Sequences can be as simple
as measuring a line, or can be expanded to include skew adjustment, datuming, the measurement of multiple
features, tolerancing and printing reports of measurement results. Programs can include the CNC motion
control option to fully automate program execution, increase thoughput and simplify operator tasks.
1
Overview
The intuitive interface will be familiar to users of
the QC-200 and other Metronics digital readouts.
Operators will find the QC-300 easy to understand
and use thanks to the large color touch screen
LCD display.
The color LCD displays alphanumeric
and graphic information for the current
measurement, part features and measurement data clearly on one screen,
eliminating the need to page or scroll
for information.
Touch screen controls select the feature to
be measured, change operating and display
modes, zero axes, and configure setup parameters.
Touch screen controls change to support measurementspecific functions displayed on the LCD screen.
2
QC-300 Series User’s Guide
Wide keys
Print/Send data
Touch screen
controls
Numeric keypad
Command keys
Color touch
screen
LCD ON/OFF
Front panel keys enter numeric data, turn the LCD on or off and send data to a printer or computer. Two
wide keys located over the LCD can quickly be pressed without looking at the front panel to initiate
frequently used functions programmed by the user. All front panel keys provide tactile sensory feedback,
and key-press operations can be configured to generate an audible sound.
Speaker and external speaker jack outputs are provided that can be adjusted for quiet or noisy
environments. Ear phones can be plugged into the external speaker jack to facilitate silent operation in
quiet environments.
Features
3
External footswitch
Lighting and zoom
Video inputs
Encoder inputs
CNC outputs
Not used
Tilt adjust
1
Overview
Speaker jack
USB port
RS-232 port
Video camera inputs are displayed on the color LCD and support NTSC and Pal formats as composite video
and S-video signals. Video images can be stored as JPEG snapshots using the optional image archiving
functions.
Measurements viewed on the LCD can be transmitted to a PC over USB or RS-232 ports or to a printer
over the USB port.
The compact ergonomic design and adjustable-tilt front panel of the QC-300 allow users to locate and
mount the instrument in a wide variety of environments that accommodate nearly any viewing requirement.
The tilt front panel can be adjusted and secured in any convenient position. Rubber feet on the bottom
prevent slipping when the system is not permanently bolted to a work surface using the bolt holes provided
in the mounting stand.
Optional foot switch is available for operation when the user is not close to the front panel. All the optional
accessories for the QC-300 are shown in detail at the rear of this guide in Chapter 14: Options.
4
QC-300 Series User’s Guide
Chapter 2:
Installation
The QC-300 is easy to install in a variety of basic and advanced measurement applications. This chapter
describes how to unpack and install the QC-300. Repackaging instructions are also included for return
shipments and for distributors and OEM customers that are configuring a QC-300 and shipping it to an
end-user.
Unpacking the QC-300
Carefully remove the contents of the shipping carton.
NOTE
Save the carton and packaging materials in case future reshipment becomes necessary.
5
2
Installation
Inspect the components listed below for shipping damage. The contents of the carton includes:
• QC-300 instrument • Mounting stand and hardware
• Power cord • Warranty registration card
Shipments of other optional equipment in separate cartons might include:
• RS-232 serial cable • Video cable
• Light control cable • CNC output cable
• Foot switch • Taltech’s WinWedge® software
If any components were damaged in shipment, save the packaging materials for inspection and contact
your shipping agent for mediation. Contact your Metronics distributor for replacement parts.
6
QC-300 Series User’s Guide
Assembling the mounting stand
The QC-300 is secured to the swivel slots of the mounting stand by a shoulder
screw, a cap screw and associated washers.
Assemble the QC-300 to the mounting stand as shown.
Tighten the shoulder screw (1), and then tighten the cap
screw (5) and washers (3 & 4) so that the QC-300 will
be secure when adjusted to the desired tilt position.
Safety considerations
The QC-300 is completely enclosed and no hazardous outputs can come in contact with the user. Safety considerations
are related to power connections and physical mounting.
WARNING
If the QC-300 falls from its mounting location, serious personal injury or damage to
the equipment can result.
Power cord and plug
Do not locate the power cord where it can be walked on or will create a tripping hazard. Connect the 3-wire
power plug to only a 3-wire grounded outlet. Never connect 2-wire to 3-wire adapters to the power cord
or remove the third ground wire to fit the plug into a 2-wire electrical outlet. Modifying or overriding the
third-wire ground creates a safety hazard and should not be permitted.
DANGEROUS VOLTAGE
Always disconnect the power cord from the source of AC power before unplugging
it from the QC-300 power connector. The AC voltage available at electrical outlets is
extremely dangerous and can cause serious injury or death.
Electrical wiring and connections
Perform regular inspections of all connections to the QC-300. Keep connections clean and tight. Locate
cables away from moving objects. Do not create tripping hazards with power cords, input/output cables or
other electrical wiring.
Use shielded cables to connect to the serial RS-232 port. Make certain that cables are properly terminated
and firmly connected on both ends.
Safety, Power and Encoders
Location and mounting
Rest the QC-300 on a flat, stable surface,
or bolt it to a stable surface from the bottom using four 10/32 screws fastened in
the pattern shown at the right.
Power surge suppressor
Connect the QC-300 to power through a high-quality power surge suppressor. Surge suppressors limit the
amplitude of potentially damaging power line transients caused by electrical machinery or lightning. When
a surge suppressor is not used, power line transients can corrupt system memory or damage circuits.
7
2
Installation
Connecting axis encoders
Axis encoders are attached to interface connectors on the rear of
the QC-300. Many encoder interfaces are available to match
the wide variety of encoders that can be used with the QC-300.
The type of axis encoder connectors will vary depending on the
application. Encoder inputs are specified as analog or TTL at
the time of purchase and cannot be changed in the field.
1 Verify that the QC-300 is off.
2 Connect the axis encoders tightly to their
connectors. An axis label is provided near
each connector. Do not overtighten the connector
screws.
Encoder input parameters must be configured later using the Encoder setup screen. Please refer to
Chapter 11: Setup for details regarding encoder setup.
X, Y, Z and Q axis
input connectors
8
QC-300 Series User’s Guide
Connecting an optional footswitch
The optional foot switch is connected to the RJ-45 connector
on the left side of the QC-300.
1 Verify that the QC-300 is off.
2 Connect the foot switch to the RJ-45 connector on the rear
connector panel.
Footswitch connector
Connecting a printer
The QC-300 supports certain HP USB printers. Printer models
must be specified when the QC-300 is ordered, or approved by
Metronics later.
1 Verify that the QC-300 and printer power are off. Connect the
USB printer to the USB Type A port on the side of the enclosure.
2 Make sure the USB cable plug is fully inserted.
USB printer
port
Connections
Connecting a computer
1 Verify that the QC-300 and computer power are off.
2 Connect a computer COM port to the QC-300 RS-232 serial
port using a standard straight-through serial cable (Metronics part
number 11B12176). Make sure the cable connectorsare tight, but
do not overtighten the connector screws.
3 Apply power to the computer, and then the QC-300. The
default QC-300 settings for communication over the
RS-232 serial port are shown here.
9
2
Installation
• Baud rate: 1200
• Parity: None
• Data bits: 7
• Stop bits: 1
• Flow control: Hardware
4 Launch the computer application that will be used to communicate with the QC-300, and configure the
communication properties of the computer’s COM port and QC-300 to match.
RS-232 serial port
connector
Connecting optional CNC outputs
The optional CNC joystick and amplifier outputs are connected
at the CNC output connector on the rear of the QC-300.
1 Verify that the QC-300 and CNC amplifier areoff. Connect
the CNC amplifier and joystick to the 26-pin D-sub connector
on the rear of the QC-300.
2 Make sure the connector is fully inserted and
make sure the cable connectors are tight, but do
not overtighten the connector screws.
CNC output
connector
10
QC-300 Series User’s Guide
Connecting optional camera lighting and zoom
The QC-300 supports top, back and ring lighting for image
illumination. The lighting output connections are made to an
external light control box through the 44 pin D-subconnector.
The 0 to 5 Volt zoom control output connections to a zoom am-
plifier are also made through the Lighting/Zoom connector.
1 Verify that the QC-300, camera light control
box and zoom amplifier are off.
2 Tighten the lighting/zoom cable to the lighting/zoom connector on the back panel. Do not
overtighten the connector screws.
The lighting and zoom outputs must be configured using the Lighting and Magnifications setup screens.
Please refer to Chapter 11: Setup for details regarding lighting and zoom setup.
Camera lighting
and zoom
connector
Connecting a video input
The QC-300 supports composite and S-Video inputs for
NTSC and PAL systems.
1 Verify that the QC-300 and video camera are off.
2 Connect the video input to the composite or S-video connector. Make sure the connector is properly oriented and do not force
the connector into place.
The camera input must be configured later in the VED setup screen.
Please refer to Chapter 11: Setup for details regarding video
setup.
Composite video
connector
S-video connector
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