I know its not exactly electronics but, Im trying to make a solar tracker of sorts. I have this acrylic plate (about 11" x 24"). I want to mount it on a shaft in order to have a motor rotate the shaft in a particular direction. My shaft at present is a 1/2" pvc pipe and I tried using 2 metal clamps around the pipe fixed onto the acrylic plate with nuts and bolts. The problem is that the clamps dont exactly hold onto the pipe strong enough. This has made me rethink what Im doing, there must be a better way:
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