Thanks for the pics. I see now how it works very nice set up. I start to built one a few years ago. I was not sure how to do a shaker motor. So I just used gravity stiff the gravel out. I had it in a 45 deg. angle. It work ok but I still had to bump the screen a little to get the rocks to roll off. I was planing to have a pulley to run a wheel that the center shaft was off center. The wheel would bump a plate on the screen which would shake the screen.
I would like to know if you have trouble with the belt coming off.