06-01-2016, 15:24
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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: 7,630
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Re: pic: Single Stage Ballshifter
Quote:
Originally Posted by jkelleyrtp
I'd assume either the shifting spread is going to be 14/11 or they're cutting their own gears to meet the teeth count. I was experimenting with gears around 14 teeth and either your driven needs to be huge (100+ teeth) or you need to have a secondary. Might be able to get away with 6inch wheels to reduce the driven gear, but he's still going to have to make custom cim gears to get anything near 2.5 shifting spread.
Edit: Did not realize a description had been posted. Your teeth count does not line up 71 vs 72, is that okay to use?
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I'm not so much saying that the two ratios literally wouldn't work / spin, though if that's an issue then there's another problem. I'm basically saying the two speeds / gear ratios on the ballshifter won't be very different, which really minimizes the benefit of shifting in the first place.
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