Quote:
Originally Posted by kamocat
If the joysticks don't re-center perfectly when you let go, there is slight movement instead of the "stopped" you might want. (usually less than 1% full speed) This is because the "deadband" to deal with this is actually on the motor controller, not the joystick, and PID is a method of ensuring that the motors do what you tell them to.
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The "deadband" is not a speed controller side problem... The speed controller deadband actually increases the number of possible PWM inputs that get you zero motion. Any "moving when centered" problem is on the joystick side. It's particularly notable on Xbox 360 controllers.
Regardless deadband is easy to fix with simple scaling functions, you don't even need PID.
You can either spend lots of energy complaining about it and whining or you can try to figure out how to make a positive experience from the whole thing. - dlavery [more] 
22-08-2010, 00:53
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