Thread: Need help in creating program to use servo's to shift drive
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Unread 24-06-2002, 00:35
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#0047 (ChiefDelphi)
  
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Re: Need help in creating program to use servo's to shift drive
Posted by Jay Lundy at 2/11/2001 2:37 AM EST


Student on team #254, The Cheesy Poofs, from Bellarmine College Preparatory.


In Reply to: Need help in creating program to use servo's to shift drive
Posted by Barry Horwitz on 2/9/2001 10:55 PM EST:



Stephen's program is correct, it's just that it is better if you give it some leeway. I forget exactly what range I let the joysticks be, but because the calibration on the joystick could be off by 1,2, or even 3 and the speed controllers still stay inactive, I used a slightly different IF statement:

if p1_y > 131 or p1_y 131 or p2_y

noShift:

I found that this works better. I think the range in my program is actually a little bigger than 123-131 and it still never stalls, but do whatever you want. I also suggest (if you haven't already done this) to use the LEDs on the operator interface to tell you what gear you are in. Also, assuming you are using servos to shift gears, make sure you wait about a second after shifting gears to move again or you risk stalling. Better safe than sorry.



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