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Unread 18-08-2005, 22:26
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Arefin Bari Arefin Bari is offline
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FRC #0108 (SigmaC@T)
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Re: pic: 2 speed V.3

Quote:
Originally Posted by Matt Krass
Nice design, how come I didn't get a sneak preview? ;-) I'd like to point out that David, Cory and even Tiffany all touched on the radius issue though, credit where deserved and all that. But maybe I'm just whiny....

Also, I understand not wanting to redo the wheels, but those ratios worry me, I'd like that on record, the low gear is ok at 6.5 fps....but the high gear seems too high.....in the hard to control range, making it useless, I think you'd be better off toning it down a bit further, say 4-4.5 fps for low and no higher than 8 or 9 for high, just to maintain control. I can't see a use a for a wildly speeding robot and 6.5 isn't that "low" really. Or maybe I'm crazy. You tell me.

Well that's my input, probably not wanted as usual but that's yet to shut me up.

P.S. I think you singed a few coattails by accident, might want to watch that until you get better.
Thanks for your input Matt. Even John told me that high gear was too fast. But if there has been robots and transmissions that has been designed and was faster and the drivers were able to pull it off on the field, every other driver in FIRST can pull it off too. There were bunch of robots out there which were fast. Why not give it a try?

I understand your concern about high speed. It maybe too high. But I believe that if one driver in FIRST can pull it off, every single other can too.

There is a very easy way to solve this problem without changing the inside of the gearbox. I can play with the sprocket, in the configuration I have right now... if I replace the 10 tooth sprocket wtih a 8 tooth sprocket (on the output shaft of the gearbox), the robot is going 5 fps on low and 10 fps on high. If I change the wheel size to 6 and change the wheel sprocket to 40 tooth, the robot is going 11 fps on high and 5.8 on low.

(I might be missing something)

I need someone to tell me and prove it to me saying that this transmission doesn't work and the robot won't move with this transmission, not the fact that drivers will need a lot of practice.

I am calling out the engineers out there. Please help me figure this out. Thanks.
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