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» Film-Tech Forum ARCHIVE   » Operations   » Film Handlers' Forum   » Limit Switch on Tom Thumb Masking Motor

   
Author Topic: Limit Switch on Tom Thumb Masking Motor
Bernie Anderson Jr
Master Film Handler

Posts: 435
From: Woodbridge, New Jersey
Registered: Apr 2000


 - posted 10-19-2008 11:08 AM      Profile for Bernie Anderson Jr   Author's Homepage   Email Bernie Anderson Jr   Send New Private Message       Edit/Delete Post 
I'm using a tom thumb masking motor from ADC and every now and then, the little plstic arms that trigger the limit switches decide to move resetting the points. It seems when the arm hits the switch the shaft spins in the arm's opening keeping the arm from moving. Each consecutive time it travels, it moves. Is there a way to lock down these arms to keep them in position?

Thanks Bernie

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Gordon McLeod
Film God

Posts: 9532
From: Toronto Ontario Canada
Registered: Jun 99


 - posted 10-19-2008 10:38 PM      Profile for Gordon McLeod   Email Gordon McLeod   Send New Private Message       Edit/Delete Post 
Some vintages had a Jam nut on either side of the arms to supply tension if not then the plastic arms are worn and need replacement

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