Originally Posted by
BrandanS
QMI,
I wish I was closer as well. I am currently running 4 Shopbots which machine aluminum, and 2 of which are dual spindles. I had a similar issue on my first ShopBot wherein the spindle mount screws became loose. We had to take the spindle assembly off to get to them. As Scott mentioned above, grabbing the nose of the spindle is what indicated it to us. You could also slide the gantry along V-Rails and test for sloppiness. Again, as Scott mentioned, if the rails are no parallel, it will feel tighter on one end then the other. When you say uniform program to program, does that mean the symptoms are apparent no matter what you run? How about where you run the program? Do some "areas" on your table seem to machine better than others?