Thread: Drill Motors and HEAT!
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Unread 24-06-2002, 00:02
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#0047 (ChiefDelphi)
  
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Think Backwards
Posted by Dodd Stacy at 2/3/2001 9:29 PM EST


Engineer on team #95, Lebanon Robotics Team, from Lebanon High School and CRREL/CREARE.


In Reply to: Drill Motors and HEAT!
Posted by Anton Abaya on 2/2/2001 12:00 AM EST:



: Okay here's the deal...

: we were playing with the drills and found out after intensly driving it for like 5 mins, that the left motor gets twice as hot as the right motor.

: in other words, the left motor which is the one that goes in reverse is heating up more than the one that goes forward.

: Question is: IS THIS NORMAL? i dont know if it's related to the reverse/forward mechanism....i didnt think so. my guess is that the left side is just creating more friction somewhere?

: what do you think? thanks..

: ^anton^

Try repeating the intensity and duration of driving you describe, but do it going "backward" in the robot frame of reference. This will invert which of your drill motors is going forward and which backward, in the drill frame of reference.

If the identity of the hot and not-so-hot motors also inverts from your earlier experience, then we can continue the speculation about motor and/or fan directional directional efficiency effects. Otherwise you will know that the driveline is sour on one side of the bot.

It is also possible that the motor itself is sour on the hot side, independent of which direction it spins. Swapping motors (but not gearboxes!) and repeating your original trial (robot going forward) would answer this.

It's called suck and see, Anton. Try it. By the way, you guys who are driving your robots around at this date have my sympathy for your problems!

Dodd



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