pic: 1305 Frame design with trannies

[Pat Roche]

Originally Posted by Hunter

They are a completely new trannsmission That I designed. Although I was definetly heavily influenced by Baker's design. It is designed to have Brecoflex tracks in the gap between the The 2x4s and the outsice plates, So the driveshaft out of the Trannies is designed to turn the back drive pulley for the tracks. The trannies are 2 speed with approxiamte speeds (70% of free speed) at 3.4 ft/sec and 9.5 ft/sec. Kinda slow compared to other designs but This is designed like a bulldozer.

Great design looks good and rugged. One quick tip, If your gonna use a track like brecoflex, which has alot of grip add in a center idler wheel which is larger than your drive wheel. It will aid in turning your machine. We used brecoflex this past year and without the larger idler our machine couldn't turn. This thread might also help you:
http://www.chiefdelphi.com/forums/sh...ghlight=tracks

[petek]

Looks like a great drive unit! Nice and compact, too. One suggestion: install them so the motors on both sides are turning in the same direction. (DC motors are almost always optimized for higher efficiency in one direction) Generally speaking, you want your highest efficiency in the robot's forward direction. This will give you slightly better torque and will be easier to balance for driving in a straight line.

[Robot Dude 0101]

That is a very nice design. Too bad you stole that other person's idea! J/K

I will soon begin work on a robot with 4 wheel drive using heavy duty gas engines. I don't know how to use any computer programs like you so mine wont be as advanced.

[Hunter]

Originally Posted by Robot Dude 0101

That is a very nice design. Too bad you stole that other person's idea! J/K

I will soon begin work on a robot with 4 wheel drive using heavy duty gas engines. I don't know how to use any computer programs like you so mine wont be as advanced.

Thats Awsome! A gas powered robot. About the Computer programs though, they don't make a design good or bad, they really helped me figure out stuff with the trannsmissions but I already had the major details worked out before I put anything down in Inventor. You can make cool designs without a computer. 1305's 2004 robot was designed entirley on graph paper and on the fly and it turned out very well for us. Don't say that you can't make an advanced design just because you can't use CAD. 50 years ago CAD didn't exist and that didn't stop anyone.

Good luck with the gas robot, let me know how it turns out, I think that is really cool.

[Tristan Lall]

Originally Posted by Robot Dude 0101

I will soon begin work on a robot with 4 wheel drive using heavy duty gas engines. I don't know how to use any computer programs like you so mine wont be as advanced.

Not for FIRST you won't! I know you're new to FIRST, so I'll point out that gas engines aren't allowed, and very likely will never be allowed as long as FIRST maintains its current format. Fuel storage and spillage are of major concern in the pit areas, and on the playing field.
Also, the emissions and heat from those engines would make working around them hazardous in a FIRST pit area.

If the robot's for something else...enjoy.