Thread: We Need Help!!!!!!!
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Unread 23-06-2002, 22:39
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#0047 (ChiefDelphi)
  
Join Date: May 2001
Location: Pontiac, MI
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systematic is the way to go.
Posted by Daniel.

Coach on team #483, BORG, from Berkeley High School and NASA Ames & UC Berkeley.

Posted on 4/2/2000 5:34 PM MST


In Reply to: Suck and See posted by Dodd Stacy on 4/2/2000 4:13 PM MST:



Good points, all of them. In the event that your motors still have their locking pins cuz maybe you like staying on the ramp at the end of the matches ;-) , you can run the wheels up on blocks and make a mark on one of the ribs. Watch and count and see if there's a dramatic speed difference. If the problem side goes slower you may be able to attribute the problem to friction. My guess is it's something more electrical. Wherever possible, make sure you fill gaps with solder. The crimp side of quick connects can and should be soldered.

It sounds to me like it is very likely a breaker problem. Your robot is working during practice backstage but it doesn't work on the field. What are the differences? I know many factors change but most shouldn't effect anything. What things might?

1) Perhaps your driver is working too much against the clock in the matches and is working too much to keep the robot alive during practice. Sudden changes in direction whether the moter is on dynamic breaking or not cause problems. Quick acceleration is also a cause of heating up. You need to be nice to these motors. Watch the driver and see how he moves the joysticks. He cant use the robot like he's playing a computer game. Motion needs to be gradual. It's a delicate machine.

2) Are you playing for heavy contact? Do you do a lot of pushing? This also could cause problems.

The puzzle is that the problem is isolated to one side. All the things I mentioned could be problems and then the smallest wireing bug or friction difference between the two sides may be popping one of the breakers before the other. At which point you stop moving and both sides cool down before you manage to cause the other motor to pop it's breaker. So perhaps it's not so much a sided problem as it seems.

I, like Dodd, don't know anything about anything electrical. Hope I'm making SOME sense.

Good luck!
-Daniel



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