I have built a home brew z axis for my bridgeport when i test the for backlash on the actual quill bracket which bolts to the ball nut there is zero back lash but when test on the end mill or collet spindle i have any where between .005 and .008 i really dont understand how this can happen isnt it all bolted togethere in the spindle is there a bolt o need to tighten on the quill man i am totally lost ' can there be slop im just totally lost now
it just seems to me if there is no back lash in the quill itself how can there be backlash on the end mill put a picture on there it is hard to see the black arrows any advice would be highly appreciated
John