Quote:
Originally Posted by gpetilli
Thats what i meant, but also tried to suggest that it to stays activated while resting on the hard stop. I have seen fast moving arms fly past the limit switch, the motor pauses, and then restarts when it clears the switch. It then powers into the hard stop as if the switch wasn't there.
I think Ether, MrForbes and myself are saying the same thing. Limit switches should be mounted next to the moving arm such that the arm sweeps past the switch; NOT directly in the arm's path such that the arm smacks the switch and uses it as the hard stop.
|
Or the limit switch contact closes. Milliseconds later, the arm crushes the limit switch. Another few milliseconds later, the switch contacts open again, never to close again, and the mechanism with over 400 ft.-lb. of torque procedes to destroy itself...