Axes of spindle and rotary table are not coplanar

Fault:

When the X coordinate was zero, the axes of the spindle and the rotary table were not coplanar, and the rotary table could not be used for precise machining.

Remedy:

Fixed two fixtures on the rotary table, as shown in the picture. While the rotary table turned to 0° or the B axis was in 0° position, made them parallel to the Z axis with a dial gauge. Found the center coordinate between the two fixtures through touching, reading and calculation:
while B=0°, X=-151.010;
while B=180°, X= 151.236.
Then:
151.236-(-151.010)=302.246
302.246/2=151.123
151.236-151.123=0.113
Added this 0.113 to the value of the 34090# parameter (REFP_MOVE_DIST_CORR[0], 456.977+0.113=457.090) and restarted the machine. Found the situation was improved.
The difference between the absolute values of the positive and negative X could be very small when the process is repeated. Finally it was 5μ in this example.

5 comments on “Axes of spindle and rotary table are not coplanar

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