View Single Post
  #6   Spotlight this post!  
Unread 30-07-2006, 03:30
Veselin Kolev's Avatar
Veselin Kolev Veselin Kolev is offline
X51 Production Company PGM (TM)
no team
Team Role: Engineer
 
Join Date: Jun 2003
Rookie Year: 2002
Location: CA
Posts: 253
Veselin Kolev has a reputation beyond reputeVeselin Kolev has a reputation beyond reputeVeselin Kolev has a reputation beyond reputeVeselin Kolev has a reputation beyond reputeVeselin Kolev has a reputation beyond reputeVeselin Kolev has a reputation beyond reputeVeselin Kolev has a reputation beyond reputeVeselin Kolev has a reputation beyond reputeVeselin Kolev has a reputation beyond reputeVeselin Kolev has a reputation beyond reputeVeselin Kolev has a reputation beyond repute
Re: Gearing That Cannot Overcome Static Friction

Oh its pretty hard to make a robot not move because its so geared up. Stall torque is so high that it creeps a bit and then kills your breakers. Ive tried it, direct driving 4 CIMS to six inch wheels. It's actually pretty funny to see, large buzzing noise from the motors vibrating at close to stall. Then the magic smoke comes, and you hope you didnt use competition CIMs.

It is a lot easier to stall out a gas engine because the torque curve tops out at close to max RPM, while an electric torque curve tops out at zero RPM.

With that said, anyone who gears up a robot so much that it doesnt move from standstill will probably never get their robot going fast enough to maintain any kind of speed at the highest gear.
__________________
X51 Production Company