Adjusting a Gemco 2006 Series Rotary Limit Switch

Adjusting a Gemco 2006 Series Rotary Limit Switch


Hi I’m Ryan with Nelson Northwest and in
this video we’re going to demonstrate how to adjust the set points of a Gemco 2006 Rotary Limit Switch. Gemco Rotary Limit Switches are commonly found
on cranes, hoists, and other machinery where motion is expressed by shaft
rotation. There are two types available, there’s a two circuit and a four circuit. The two circuit will have two cams that can be independently adjusted, and the four
circuit will have four cams. In this demonstration we’re going to adjust a
two circuit as if we were setting the end points of travel. To do this I will
need two tools: a flat head screwdriver and a 1/16 hex key. The hex key is
normally provided with 2006 limit switch but it may have been removed. First
remove the cover screws. Now we can remove the cover. If the hex key is in the holder, remove
it. If it’s missing, you can use a 1/16 hex key. Next, move the machinery so
that the shaft is rotated to the desired setpoint. This could be the fully open
position of a door, or the top of travel for a crane. I’ll simulate this by
rotating the shaft Note the direction of rotation of the
cam as it approaches the desired setpoint. Identify which snapswitch you want to
adjust for the set point–in this case we’ll adjust the one on the left. Loosen
the set screw for the appropriate cam. The set screws are color-coded. There’s a
diagram with color codes in the cover. Identify the adjustment screw for the
cam. Next, move the cam backwards slightly so
that the switch is not actuated. If you’re adjusting the end of travel
you’ll move the cam back toward the middle of travel. Now, move the cam toward
the set point until the switch is actuated. You should hear the snap switch
click. Now tighten the set screw. Verify that the set point is now correct
and adjust if necessary. Repeat this for any other set points. Remember to put the
hex key back in place and reassemble the cover. For reference here’s a diagram of color
codes for set screws. If you have questions about adjusting
your rotary limit switch or need replacement parts, please contact us.

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