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Unread 30-01-2006, 19:35
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Astronouth7303 Astronouth7303 is offline
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AKA: Jamie Bliss
FRC #4967 (That ONE Team)
Team Role: Mentor
 
Join Date: Jan 2004
Rookie Year: 2004
Location: Grand Rapids, MI
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Re: Manual Velocity PID, anyone successful?

Quote:
Originally Posted by CronosPrime1
Honestly, I don't know why everyone does not like the direct joystick to PWM value mapping. All it takes is some driving experience. In the time it takes you to get a program for manual velocity PID working, you could instead become an experienced robot driver. You really could. And you would not clutter up unnecessary space on your robot controller. And you would save yourself many headaches. If there is some specific time when you need slow and precise control (say, for making a ramp when it is being cluttered by the two other robots), you could implement a half-velocity switch - press a switch, and the joystick inputs are reduced by half.
  • We have program memory to burn
  • I doubt anyone can aim their cannon that accurately using straight PWMs
  • Doesn't help you in autonomous
  • If we didn't screw around with PID, we'd be out of a job.
  • What if the driver stayed up a little too late last night and his/her abilities are not showing today?
  • Sometimes, 8-bit resolution just isn't enough
  • If your motors are a little off on one side, your drivers are going to be cursing
  • PID is pimp when done right
  • What about 2/3s velocity? 1/2 can be slow, and you only got 40 seconds before having to go do something else
  • There is a sense of accomplishment when you get through the headaches

Now be quiet and tune your loops.