Originally Posted by pastera  With shims at the four bolts on the column.
I used plate glass, DTI and torque wrench. The torque wrench keeps things consistent between iterations.
Mount the DTI on a shaft in the spindle such that it swings the largest arc possible while still rotating 360°.
Center the table and lock the gibbs.
Place your glass on the table to give you a nice flat surface.
Lower the head and swing the DTI to get readings at 0°, 90°, 180°, and 270°.
The difference between the 0° and 90° is the column tilt in the Y axis as I am describing it.
place equal shims under either the front two bolts if the 0° reading is higher.
repeat until aggrivated.
I didn't mill any tapered shims but that would be a good idea once you know what the correct shim stack is.
Aaron |
Thanks for that
I was thinking of slapping a carefully milled 2-3" spacer block between the column and the table to give me more spindle-table distance, I guess I could use your technique to ensure that the column is still true. Or would raising the column that much be a recipie for disaster? I think there's plenty of Z-travel for my needs, but the 1st 75mm are eaten up by collets and the mill, and the last 50-80 by my vice, so I could really do with raising the column a bit.
I haven't tried any of the alignment yet - but my CNC Fusion kit has just arrived at the Post-Office depot - is it worth aligning before taking all the handwheels etc off to fit the CNC, or should I just do it when everything's fitted?
Ta.