[email protected] wrote: > Tramming the spindle will tell you how perpendicular the spindle centerline > is to that particular spot on the table surface. It will not tell you the > perpendicularity of the spindle centerline (or the Z axis) to the XY plane. > The actual level of the machine is almost irrelevent. If all the machine > components are fixed at the same level values and the machine is straight and > square you will be able to machine straight and square Right, I have a procedure for this. I mill a circular track in a piece of scrap. Then I move the spindle to the center of that circle, and sweep it with a dial indicator. Unfortunately, my machine has wear on all the ways, and so I get a horse saddle shape, with an upward curve in one axis and a downward curve in the other. But, sweeping it with the indicator, I can split the difference and get the spindle as close to perpendicular to the "average" of the X-Y plane.
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