Quote:
Originally Posted by smcmahon
Last night we had mounted a 2012 KOP Fisher Price gearbox and motor on the side of our elevator. We wanted to use it to power down the bridge lowering rail. It went down just fine. However it stutters, for lack of a better term, coming back up. The motor appears to run for a second, stop, run, stop, etc. But only in reverse.
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Have you counterbalanced your elevator?
Don't forget that when pushing a lift down, gravity works
with the motor, but
against you when pulling it back up. The same applies to any mechanism that works with gravity one way, and fights it the other way. Sort of like how going down stairs is easier than going up
If you haven't counterbalanced your elevator, then that would produce exactly the type of behavior you describe.