06-07-2016, 11:43
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no bag, vex only, final destination
AKA: Pinecone
 FRC #0228 (GUS Robotics); FRC #2170 (Titanium Tomahawks) Team Role: Mentor
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Join Date: Dec 2008
Rookie Year: 2006
Location: Glastonbury, CT
Posts: 7,587
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Re: pic: GEAR & CHAIN IN TUBE 8WD
Quote:
Originally Posted by Ty Tremblay
Using the tube to keep chain on is sub-optimal. In my opinion, you shouldn't use anything other than proper tension, power transmission, and tooth engagement to keep a chain on the sprocket. If you design the c-c spacing properly, the chain shouldn't get loose enough to jump off sprockets as it wears in.
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It's just that I've built a bunch of chain drives at exact center distance, using sprockets of a variety of different sizes and under different loads, that have stretched to the point of jumping off sprockets. Everything is properly aligned, it's just from wear. I've always been told the "magic" of chain-in-tube is the tight fit prevents a loose chain from jumping, since it has nowhere to go, but maybe I just have bad chain runs or something.
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College Mentor: 2791 (2010-2015)
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