View Full Version : Speed problems when reverse mounting motors

02-09-2007, 08:00 AM
I'm using 2 trico wiper motors for a simple differential drive on my robot. I have the (normal) problem in that one of the motors is reverse-placed and runs at a slightly slower speed than the other.

I have a Sabretooth motor controller ready to go, but I doubt if this will help at all.

I'm wondering if I can put a trim resistor in series with the faster motor, and tweak it until I can get the motors in sync.

Then maybe replace it with a fixed resistor when I know the right value.

Does this sound feasible?


02-09-2007, 08:02 AM
...I almost forgot...

Since the motors love lots of current, what kind of resistor would I need?

02-09-2007, 10:11 AM

I just realised that you can control the motor speed independently with the Sabretooth.

Yay! That should fix it.

[I'm talking to myself...]

02-09-2007, 01:57 PM
Well, it looks like you've figured it out. Just experiment and fix the speeds through software. Have fun!