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Unread 10-04-2006, 21:46
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Re: 222's TigerDrive

Very nice, Any clip's of it shifting id be interested in seeing it in semi-action. Also what were the gear ratio's you used 1155 is looking to make our own shifting transmission in the preseason next year and was planning on using a similar motor to gear set up.
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Unread 10-04-2006, 22:15
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Re: 222's TigerDrive

Quote:
Originally Posted by nycpunk
Very nice, Any clip's of it shifting id be interested in seeing it in semi-action. Also what were the gear ratio's you used 1155 is looking to make our own shifting transmission in the preseason next year and was planning on using a similar motor to gear set up.
Gear reductions are as follows:

Transmission output in Low Gear is 10.9:1
Total output to wheels in Low Gear is 54:1 for slightly less than 4fps.

Transmission output in High Gear is 3.64:1
Total output to wheels in High Gear is 18:1 for 11fps.

We don't have a close up video of it shifting, but you can see how it performs by watching Match 70 from VCU
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Unread 10-04-2006, 23:50
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Re: 222's TigerDrive

Love 222's ball shifter. Nice refinement. Now if you could get it to shift with a servo that could free up a lot of weight for years when air is not needed. Also I've always looked at the round recess in the gears and wondered about the forces on the gears and balls when engaging and disengaging. Would a v slot work better?
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Unread 11-04-2006, 00:00
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Re: 222's TigerDrive

Quote:
Originally Posted by Gdeaver
Love 222's ball shifter. Nice refinement. Now if you could get it to shift with a servo that could free up a lot of weight for years when air is not needed. Also I've always looked at the round recess in the gears and wondered about the forces on the gears and balls when engaging and disengaging. Would a v slot work better?
We went with the design that the Hodaka motorcycle had which was the ball shape. It hasn't given us a problem, ever, so why fix it if it isn't broken ?

As far as the cylinder vs. servo:
It has been discussed here on CD somewhere before but I still hold the KISS belief in mind. In. Out. No question. A servo can do it, but I personally don't want to risk a low back up battery costing the team a match. Plus with how much I shift out on the field, we would probably have to switch backup batteries every match. Thats just another thing to worry about when we don't have to.
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Unread 11-04-2006, 06:46
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Re: 222's TigerDrive

Niiiicccee! It's two times smaller than ours...lol
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