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Unread 14-01-2005, 11:36
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Joe Johnson Joe Johnson is offline
Engineer at Medrobotics
AKA: Dr. Joe
FRC #0088 (TJ2)
Team Role: Engineer
 
Join Date: May 2001
Rookie Year: 1996
Location: Raynham, MA
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Re: Controls for a Crab Drive

Quote:
Originally Posted by I.Green
Does anyone have a picture or something of crab drive system?
Here is one of the Grand Dads of Swerve Drive: CD6






There are many more pictures of CD6 HERE

As to control, I like this method:

2 Joysticks

Y position is aways Forward / Back Tank style drive (fight stick in front of the left implies "twist CCW")

average of X positions define what direction is "FORWARD" (both joysticks to the right - "to the robot's right is FOWARD" both joysticks to the left - "to the robot's left is FORWARD" One Joystick left - "45 Deg. to Left is FORWARD" )

It is makes sense to the driver once they drive for a few minutes: Side to side controls the direction of FORWARD with respect to the robot other than that it behaves like a simple tank drive.

Joe J.

P.S. If my typing is a bit messy it is probably due to the tears in my eyes at having seen my old friend CD6 again. Ah yes, we had such fun together...
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Last edited by Joe Johnson : 14-01-2005 at 13:28.