AMETEK 1980 User Manual

1980 Rotating Cam Limit Switches

Ordering Guide & Technical Information

Features

• Precision Cam adjustment at any angular position of the Camshaft

• Speeds from 0 to 500 RPM in either direction

• No special Cams required for any contact setting from 4° to 356°

• No tools required to adjust Cam setting

• Accurate repeatability

• GEMCO rugged duty precision snap action switches

• U.L. recognized switches under ﬁ le E56660

Accessories

The following accessories can be obtained with the GEMCO Rotating Cam Limit Switch:

For OSHA Standards

• Motion Detector *

• GEMCO DRIVE-CHEK

Either of the above is necessary for mechanical press application

• Dual Shaft Cam Switch

Consult manufacturer for desired accessories

Applications

GEMCO’s all new Micro-Adjust Rotating Cam Limit Switch is a pilot device used for heavy duty material handling mechanisms, mechanical presses,* packaging machines, rotary table, and in many other applications where accurate, repetitive, and sequential operations are required in control circuitry.

• Straight Drive and Right Angle Gear Reducers

• Timing Dial and Timing Dial Window

• Electrical Wiring per Customer’s Speciﬁ cation

• Motor Driven Rotating Cam Limit Switch with AC or DC for Adjustable Speed Drives

• Potentiometer driven off the Camshaft

• Spring Return Mechanism

• Plug-In Socket

• Double Ended Shafts

• Pilot Lights

• 3 Way and 4 Way Air Valves directly interchangeable with switches

• Special Conduit Opening

• Special shaft extensions and keyway

• Adjustable Coupling (See Catalog Section

3001)

• Special Cams & Large 6” Cams for Higher Resolution

• Combination Adjustable-ln-Motion and MicroAdjust Circuits (see Catalog Section 1981)

• Electric Clutch and/or Brake

• Separate Terminal Strips

• Add-A-Cam Feature

• Factory Adjustment of Cams Available

• Open Type Units

• Dual Shafts

When motion is expressed in shaft rotation, either through a roller chain, gear train, or directly, the GEMCO Rotating Cam Limit Switch makes it possible to open or close independent circuits at any desired angular position.

FIG. 1

FIG. 2

FIG. 3

1080 N. Crooks Road • Clawson, MI 48017-1097 USA • 800.635.0289 • 248.435.0700 • Fax: 248.435.8120 • www.AMETEKAPT.com

Easy Set-Up Procedure

READ CAM

SETTING HERE

ALWAYS VIEW

CAMSHAFT ROTATION

FROM RIGHT SIDE

One Turn of Adjusting Dial

Moves Cam 10°

(Adjusting Tool #P0034600

Inside Cover of Each Unit)

Mounting of Unit

FRONT SIDE

Mount the assembly and couple input shaft to the driving member with the shaft keyway up and in line with the positioning arrow on the bearing end plate. The machine should be in the start cycle position.

Establishing Camshaft Direction of Rotation

Cam settings should be made with the Camshaft uppermost to the viewer. The picture at the top right illustrates this viewing position and also shows the adjusting tool being applied to the adjusting wheel. Shaft rotation is always established off the right end of the unit even when the input shaft, whether direct or through a gear reducer, is situated at the left end.

As an aid to designating shaft rotation when a gear reducer is used, consult page 14 of this catalog section.

Cam Settings

SWITCH SIDE

For clockwise rotation, set ‘’make’’ angle with the black dial and ‘’break’’ with the red dial for dwell settings less than 180°. Reverse colors for dwells 180° or greater.

For counterclockwise rotation, set ‘’make’’ angle with the white dial and ‘’break’’ with the yellow dial. Reverse colors for dwells 180° or greater.

Switch connections should be made in accordance with the illustrations to the right, which incidentally are both clockwise rotating examples.

1080 N. Crooks Road • Clawson, MI 48017-1097 USA • 800.635.0289 • 248.435.0700 • Fax: 248.435.8120 • www.AMETEKAPT.com

Description

Technical Data

Precision, rugged duty snap action switches, extremely accurate cam adjustments with a heavy duty shaft, rugged case and lifetime sealed ball bearings, have been combined by GEMCO to provide the most versatile and dependable Rotating Cam Limit Switch available.

No Special Cams are Required

The accurate cam adjustments are made possible by the use of a separate reduction drive in each half of a circuit cam block assembly. This drive provides a 36 to 1 ratio which means that one revolution of the adjustment wheel will advance or retard the cam setting by 10 degrees.

• The maximum temperature with full electrical load is 185°F. The minimum operating temperature is 50°F minimum cam adjusting temperature is -10°F.

• Standard GEMCO Rotating Cam Limit Switches have a rating of 50 pounds end thrust and 500 pounds radial load on standard shaft extensions.

• Torque Required - .6 lb. - In/Circuit.

• Repeatability +/- 1/4°

Snap Action Switches

All standard GEMCO Rotating Cam Limit Switches employ SPDT precision type snap action switches which provide the advantage of double-break contacts and are actuated at a uniform rate to give long life. DPDT switches can be provided upon request. Any number of circuits from 1 to 40 may be supplied as standard in Nema 1, Nema 4, Nema 7 and Nema 12 enclosures.

Each switch setting can be adjusted to your circuit requirements. arrangements is available with the GEMCO Rotating Cam Limit Switch, with no special mounting cams, dogs, etc. for contact settings.

GEMCO Microadjust Cams Provide Unlimited Circuit Versa

An unlimited selection of circuit

tility

For most applications, therefore, no special cams are necessary and settings may be changed at any angular position of the camshaft.

• Lifetime Sealed Ball Bearing allows mounting in any position.

• Large Cover Openings for ease of wiring.

No Minimum Speed is speciﬁed because snap

• action contacts are used. Maximum rated speed of the Camshaft is 500 RPM and can be rotated either clockwise or counterclockwise.

Two types of compact integrally Mounted Gear

• Reducers are available with ratios of 1:1 through 600:1. They can also be supplied with speed multipliers up to 1:8.

1080 N. Crooks Road • Clawson, MI 48017-1097 USA • 800.635.0289 • 248.435.0700 • Fax: 248.435.8120 • www.AMETEKAPT.com

Electrical Switches

Description

The GEMCO Precision Snap Switches are designed for industrial duty applications where compact size, complete reliability and millions of trouble free operations are required.

The housing is molded material which has excellent resistance to arcing and carbon tracking. The operating button is of molded nylon, a material with excellent wear characteristics.

The button is well guided at the top and bottom to insure accurate repeatability and minimum wear.

The switches are individually mounted and can be readily replaced without the need of adjustment or alignment. All switches have binder head terminal screws which are accessible for wiring with either stripped or wire lug connections.

Any combination of single-pole double-throw or double-pole double-throw snap action switches can be supplied with the GEMCO Rotating Cam Limit Switch.

Electrical Contact Ratings

Inductive Pilot Duty 35% Power Factor Resistive 75% Power Factor Inductive Pilot Duty and Resistive

Make Break

Switch

Type Contacts Volts

1950-4 DPDT 115

230 440 575

1950-1 SPDT 110

220 440 600

30 15

7.5 6

40 20 10

VA Amps 3450 3450 3450 3450

0.75

1.5

0.6 15 10

6 5

VA 345 345 345 345

Continuous

rying Amps

10 10 10 10 15 15 15 15

NOTE:

Refer to Catalog Section 1950 for detailed information pertaining to all Standard and Special Switch Options.

Amps

Double-

Throw

0.2

0.1

0.25

0.1

Continuous

Carrying AmpsAmps

Car-

Make, Break and Continuous

Carrying Amperes

10 10 10 10 15 15 15 15

Volts

115 230 600

-115 230 600

Make and Break

Single-

Throw

1.0

0.3

0.1

0.5

0.25

0.05

10 10 10

-15 15 15

1080 N. Crooks Road • Clawson, MI 48017-1097 USA • 800.635.0289 • 248.435.0700 • Fax: 248.435.8120 • www.AMETEKAPT.com

1980 1 04 – R – SP — X

NUMBER

OF CAMS

ENCLOSURE

TYPE

1980 Standard

1980R Built-In Resolver

SEE PAGE 10

FOR CATALOG

NUMBER

X NO TIMING DIAL

HORIZ.

Mtg.

VERT.

Mtg.

SWITCH OPTION

— NO SWITCH OPTION

R RUBBER BOOT

TD1 C.W. ROTATION

{

TD2 C.C.W. ROT TD3 C.W. ROT

{

TD4 C.W. ROT

* NOTE: If window is required for

timing dial, replace D with W in Catalog Number (i.e., TW1)

HORIZONTAL Mtg.

NOTE: Timing dial always mounted at right hand and as shown, takes one circuit space, as viewed from right side.

TIMING DIAL*

ATION ATION ATION

}

c.w.

RIGHT

Side

TIMING DIAL

DECAL

TD1 NP-76-B TD2 NP-71-B TD3 NP-78-B TD4 NP-77-B

c.w.

RIGHT

VERTICAL Mtg.

Side

SWITCH TYPE

SINGLE POLE

DOUBLE DOUBLE POLE

DOUBLE SPDT

**SPP

PLUG-IN SOCKET DPDT

**DPP

PLUG-IN SOCKET SPDT

SPK

CLAMP

SHAFT EXTENSION

R RIGHT HAND

L LEFT HAND

D DOUBLE ENDED

NO SHAFT EXTENSION

OPPOSITE GEAR BOX

EXTENSION OPPOSITE

SHAFT

GEAR BOX

THROW

WITH

TERMINAL

** When plug-in switches are speciﬁed, one extra circuit space must be allowed for in the enclosure.

1080 N. Crooks Road • Clawson, MI 48017-1097 USA • 800.635.0289 • 248.435.0700 • Fax: 248.435.8120 • www.AMETEKAPT.com

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