It cannot be the coupling as you have axial play. If you totally removed the coupling the axial play will be the same. Think about it, the thrust bearing connects the ballscrew to the table, not the coupling.
X-axis axial movement (relative to the base) is controlled by the ballnut, the thrust bearing and the Y-axis gib. One of then is not adjusted correctly. Use your DTI with a bit of thought to find out which.
Phil
PS: the slack looks bad enough you should be able to see where it is without the DTI.
Originally Posted by Jay C  I suppose, but why do you say it's there an not in the coupling?
Also, the thrust bearings I'm using are the ones that come on the X2 originally ... they are being reused. Just simple ball cage sandwiched between two steel races seen here. There are two bearing actually. one on the inside, one on the outside. The outside one is held in place with a clamp collar.
Jay |