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Unread 23-11-2011, 10:41
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Joe Johnson Joe Johnson is offline
Engineer at Medrobotics
AKA: Dr. Joe
FRC #0088 (TJ2)
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Re: [DFTF] Closing the loop on Wheel Velocity...

Quote:
Originally Posted by Hugh Meyer View Post
Joe,

I am confused with your comment here. It does support this; they just call it "Speed Control Mode" See page 12 in the attached manual.

Am I missing something?

-Hugh
No, I guess I have been missing something. I have looked at a lot of Jaguar docs but missed that one.

Looks good.

Has anyone used two (or more) Jaguars driving 1 wheel (or more specifically set of wheels on one side of the robot), with one wheel encoder feeding multiple Jaguars... ...IN VELOCITY CONTROL MODE (phew! that's a mouth full)?

If so, did it work well? Also did you use an I term in the PID loop (i.e. a I gain != 0)?

Finally, digging even MORE into the details, "Speed Ref <val>" command takes an unsigned 8 bit number for <val>. How do you set negative velocities ? Oh... never mind, I see that this is used to tell the Jaguar what is the speed sensor (only the encoder is supported but I guess they are imagining a day when others may be)

Joe J.
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