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Unread 03-05-2012, 07:59
Unsung FIRST Hero
Al Skierkiewicz Al Skierkiewicz is offline
Broadcast Eng/Chief Robot Inspector
AKA: Big Al WFFA 2005
FRC #0111 (WildStang)
Team Role: Engineer
 
Join Date: Jun 2001
Rookie Year: 1996
Location: Wheeling, IL
Posts: 10,792
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Re: Dual CIMs and #25 Chain

sst,
I have seen many teams use your method to tension chain from the transmission. Often the washers allow the mounting for the transmission to shift, bend and twist under the load of reversing the drive. Without pictures this is pure conjecture but when the trans moves, the chance for the chain to climb up on the sprocket increases. Something has to give. I would bet that a close inspection of your sprockets with a bright light will show some unusual telltale marks. That is where the chain break occurred when it was caught on a high spot or tooth during the stress.
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Good Luck All. Learn something new, everyday!
Al
WB9UVJ
www.wildstang.org
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Storming the Tower since 1996.