bentz69

I bought quite a few cordless tools fromt ryobi recently and I have some questions about the belt sander. It seems very difficult to keep the sand paper centered on the machine. The tracking knob doesnt seem to do much and the paper is always walking off the wheels. This is the first belt sander I have ever owned so I was curious if the screw from the tracking knob is supposed to be off centered? Is the front wheel also supposed to be crooked like in my picture?