Omni Mania

[George1902]

Originally Posted by troy_573

I have a quick question. Ok, of all the research ive been doing on omni drive systems i like the holonomic the best ... but since 2002 FIRST has only given 2 matching motors ... How can you accompish a true holonimic drive with only 2 matching motors ... oh yeah and i hate the 4 wheeled holonmic drive, it limits manuverability to fowards/backward and side to side

All you're concerned with is that the output speeds match eachother. This can be done with gear ratios to get them close to the same speed and shaft encoders to take care of minor variations. It's very similar to the way teams use shaft encoders to make sure their tank-style drivetrain goes straight.

"Limited maneuverability" isn't in the vocab of a holonomic drivetrain. Both our and SPAM's 'bots were of the 4-wheeled variety last year and they sacraficed nothing in terms of maneuverability.

Take a look at Evette and SAM if you'd like.

[ajlapp]

before the 2002 season we built our prototype kiwi drive with two drills and one fisher price motor. as with any other motor matching we geared the fisher price to meet the drills free speeds. we had never recieved three matched motors before but were determined to use our kiwi drive and controls. when the kit arrived and we had three matched drills we were psyched........but our prototype worked awesome even with one odd man out.

because of the nature of the kiwi drive the slight differences in motor matching didn't affect performance, you're constantly using all three mtors and wheels and it just buzzes along. we've never used it again, but neither has anyone else. it's a really great drivetrain....we've built all kinds and the kiwi is still my favorite.

[SpaceOsc]

Originally Posted by ajlapp

before the 2002 season we built our prototype kiwi drive with two drills and one fisher price motor. as with any other motor matching we geared the fisher price to meet the drills free speeds. we had never recieved three matched motors before but were determined to use our kiwi drive and controls. when the kit arrived and we had three matched drills we were psyched........but our prototype worked awesome even with one odd man out.

because of the nature of the kiwi drive the slight differences in motor matching didn't affect performance, you're constantly using all three mtors and wheels and it just buzzes along. we've never used it again, but neither has anyone else. it's a really great drivetrain....we've built all kinds and the kiwi is still my favorite.

is the kiwi drive defined by the fact it has three omni wheels? does that seperate it from other omni drives? lets say using 4 to 6 omni wheels. or is it something else that makes it kiwi

[Elgin Clock]

Hmm.. even I too am victim of misreading thread titles.

I thought this was a thread about potential guests during the Championship event of the Omni hotel in Atlanta.

Oh well...

Carry on.