AMETEK 1970 User Manual

Series 1970
Gemco
Drive-Chek
TM
Control Catalog
. . . OFFERS ENGINEERED PROTECTION FROM . . .
• BROKEN DRIVE CHAINS
• LOOSE DRIVE CHAINS
• SHOCK DAMAGE
DRIVE-CHEK
WITH GEMCO ROTATING
CAM LIMIT SWITCH
2
DESCRIPTION
The DRIVE-CHEK is a multi-purpose sub base that is mounted under a chain or belt driven mechanism. The unit serves three purposes; namely, a broken chain or belt detector, a chain or belt tightener, and a shock and vibration isolator.
A Gemco Indicator Switch is provided with each DRIVE- CHEK Unit to indicate when a drive belt or chain failure has occurred. Shock and vibration from the machine to the hinge plate of the DRIVE-CHEK Unit are dampened by coil springs on one end of the hinge plate and an elastomeric support on the other end.
The springs also maintain a constant tension in the drive belt or chain. DRIVE-CHEK is of rugged welded construc­tion and is painted to prevent corrosion. The drive chain or belt can be attached to the mechanism being driven from either above or below the DRIVE-CHEK base.
The mounting and set up procedures for the DRIVE-CHEK Indicator Switch and the location of the coil springs are out­lined on pages 4 and 5.
DRIVE-CHEK INDICATOR SWITCH
Function and Installation
A Gemco single pole double throw switch with mounting plate is supplied with each DRIVE-CHEK Unit and can be easily mounted inside the Gemco Rotating Cam Limit Switch enclosure. A Gemco double pole double throw switch can also be supplied at additional cost.
Three holes are drilled in the base of the Rotating Cam Limit Switch (see pages 6 and 7 for size and location) to mount the DRIVE-CHEK Indicator Switch. After the unit is mount- ed on the machine with the Rotating Cam Limit Switch and drive chain in place, the two coil springs between the sta­tionary and movable part of the unit will be compressed to nearly their solid height.
The indicator switch is then adjusted to be engaged. If the chain breaks or runs off its sprockets, the coil springs will raise the hinge plate and the indicator switch will be disen­gaged (when the drive is below the hinge plate). The switch would be wired into the control circuit of the machine drive to stop the machine.
When ordering the DRIVE-CHEK Unit with the Gemco Rotating Cam Limit Switch, there will not be any additional charge for drilling the holes in the Rotating Cam Limit Switch enclosure for the Gemco Indicator Switch.
1980 NEMA 1 1980 NEMA 4 and 12
No. of
Circuits Catalog Number Catalog Number
2 – 4 1970-104 1970-1204 5 – 6 1970-106 1970-1206 7 – 8 1970-108 1970-1208
9 – 12 1970-112 1970-1212 13 – 16 1970-116 1970-1216 17 – 20 1970-120 1970-1220 21 – 24 1970-124 1970-1224
Addition Replacement indicator switch S.P.D.T. Cat. No. 1950-1404 D.P.D.T. Cat. No. 1950-1405
DRIVE-CHEK for Gemco Catalog Section
1980 Rotating Cam Limit Switches*
3
1. Align Drive Sprockets and mount DRIVE-CHEK base using 5/16" bolts.
2. Engage proper length drive chain to allow hinge plate to be parallel to the base when drive chain is tight.
3. Attach flexible conduit to allow free movement of the hinge plate.
4. Set switch adjustment bolt to engage indicator switch if the drive chain breaks.
5. Tighten adjustment bolt locknut.
6. Assemble springs with washers on each end of the coil springs and self-locking nuts. The springs should be compressed to nearly solid height.
7. Check the movement of the hinge plate to insure that the conduit and chain guard does not restrict the hinge plate from tripping the DRIVE-CHEK Indicator Switch.
MOUNTING and SET-UP for GEMCO DRIVE-CHEK
with DRIVE CHAIN UNIT
1 2
3 4
5 6
6A
6A - Drive chain below is the same procedure to
install
1970.C1
4/99 • Z26
1M
DRIVE-CHEK DIMENSIONS FOR SERIES 1980
NEMA 1 NEMA 4 and 12
NO. OF
ABCD
CIRCUITS
2-4 7.31 4.42 5.00 9.75 5-6 9.75 6.86 5.00 9.75 7-8 12.19 9.30 5.00 9.75
9-12 17.07 14.18 5.00 9.75 13-16 23.48 20.60 5.50 10.25 17-20 28.36 25.48 5.50 10.25 21-24 33.24 30.36 5.50 10.25
NO. OF
ABCD
CIRCUITS
2-4 7.31 4.42 5.00 11.40 5-6 9.75 6.86 5.00 11.40 7-8 12.19 9.30 5.00 11.40
9-12 17.07 14.18 5.00 11.40 13-16 23.48 21.62 7.00 13.40 17-20 28.36 26.50 7.00 13.40 21-24 33.24 31.38 7.00 13.40
Dimensions shown apply when platform and base are parallel.
1080 NORTH CROOKS ROAD • CLAWSON, MI 48017 USA
800-635-0289 • 248-435-0700 • Fax 248-435-8120
www.patriotsensors.com • www.ametek.com
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