@gopatterson, We should have our bumpers mounted this weekend. The plan is to have the bumpers sit about 1.5-2 inches off the ground. We will use some 2 inch angle stock to make bumper mounts. I'll post a CAD file of those once I make them. :-)
Hey Brandon, I think the big sprocket is 60 toothed and the small one is somewhere around 30. I would need to count again to get it exact. I think it may be in an earlier post on this thread.
The denso motor was not up to the job on its own. In the original design we were just using pressure to hole the plastic thing onto the front of the motor. But the weight of the arm was pulling the plastic thing out of alignment and then catching the gears. To relieve that we drilled a hole in the front bracket and shoved a plastic pacer through the hole and into the plastic thing on the front of the window washer motor.
The denso motors are not strong enough to turn the arm over on their own. We thought about using counter weights, but didn't have any available. We ended up using bungy cords as counter weights. This way the motor has to work to lower the arm making lifting the arm a lot easier. We need to add the extending mechanism which we should only need to reach the top peg.
http://www.youtube.com/watch?v=v4__hDKGQuU
That is a video. We took the plastic cover off to work on the arm, and filmed it before putting the cover back on.
Hope this helps someone.
Edoga