wiper-motor speed mod (How-to equalise bi-directional speed)

Hi to all,

I'd like to share the results of my tests on trying to adjust the car wiper motor's speed to be equal to both directions.
I succeded and took a little video guide how to do it yourself too.

Before anything else, I'd like to thank Jim (http://www.jimspage.co.nz) for his idea and directions on how to do this fix.

First of all, my car wiper motors case have a small hump on their contact surface to the rest of the motor with a cavity to both fit toggether only in a certain point.

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To be able to rotate the case to any desired point I had to trim off this hump with a file tool.

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Be carefull not to let the small metal particles to fall into the case as the magnets in there will attract them.

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Then put the motors case back and feed it with some power to start the adjustment of the speed. Watch the video to see how and why.


http://www.youtube.com/watch?v=XZHyXPuMxFo


In the end you will have to mark the position that both directions have the same speed and drill or cut new holes on the case to bolt it to this position. (I'll do that to the wiper motors I have on my joyrider and show you more later.)

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Regards, Thanos