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Unread 17-03-2010, 00:43
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Re: fine control of robot with mecanum wheels

Quote:
Originally Posted by Dad1279 View Post
As a point of reference, we used the AndyMark 8", directly driven with 12:1 transmissions. For control we used Logitech 3d, using the 'twist' of the joystick for rotation.

They were driven by PWM, w/o feedback. Rotation/twist was scaled down.

This worked fine on both our test-bot and the final robot.
AndyMark 8"... check
3-axis Joystick ... check
"twist" for rotation ... check
PWM ... check
no wheelspeed feedback ... check
rotation "scaled down" ... check

only difference is wheels are connected to toughbox (12.75:1) transmissions via sprocket and chain.

What kind of curve-shaping did you do on your joystick outputs before feeding them into your wheel-command-calculation algorithm ?


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