Thread: WARNING...Dr. Joe's advice on the drill shaft is incomplete!
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Unread 23-06-2002, 22:31
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#0047 (ChiefDelphi)
  
Join Date: May 2001
Location: Pontiac, MI
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Cheating Fate
Posted by Dodd Stacy.

Engineer on team #95, Lebanon Robotics Team, from Lebanon High School and CRREL/CREARE.

Posted on 3/29/2000 5:19 PM MST


In Reply to: so easy it seems like cheating =) posted by Daniel on 3/29/2000 1:37 PM MST:




: Also, this may not be easier but for teams with fewer resources, the drill output shaft can be extended instead of replaced. Lathe down the threads on the end of the output shaft (but be carefull not to make the walls too thin), drill a hole the size of the modified output shaft in a piece of round aluminum bar stock, put those suckers together with some silver solder and lathe down the result to whatever size you need your shaft to be. This way you have a minimal amount of advanced machine work, in case not everybody has the resources of say chiefdelphi and the other monster teams ;-)

:
: -Daniel

Daniel,

I admire and commend your efforts in starting up a team, and I hope BORG covers themselves with glory in Orlando. But I really think you're tempting fate with your drill gearbox shaft extension technique. I sincerely hope I'm wrong, but I've gotten that detail wrong 3 years running and had failures, before finally taking Joe's advice and just machining one piece extended shafts (without the anti-backup cam/pins) this year.

The resource it takes is a few hours of a good machinist with a lathe and a mill. It's a nasty place to have a failure and try to recover during eliminations. If you guys retained the drill gearbox's adjustable output torque limiters, I'd urge you to set them as loose as possible without compromising your acceleration. Good luck and kick bot.

Dodd



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