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6. Machine Accuracy Measurement and Adjustment
※ Note) Spindle Housing Vertical Adjustment(18,000rpm spindle)
(1) By referring to “Spindle centerline and X-axis movement squareness”
above, measure the exact squareness.
(2) Calculate the amount of Liner polishing by calculating the length of the
square ruler and the outer diameter of the spindle housing.
▪ Since the outer diameter of the spindle housing is 250mm, multiply the
squareness measurement by 0.8.
(3) Disassemble and take out the spindle head cover and loosen the spindle
housing fixing bolts (8-BB10ⅹ30).
(4) When measuring squareness, if X- gives “+ ”, remove the fixing bolts 3∼4
pieces on the left liner, take out the left liner, polish the liner as calculated,
and reassemble. If X- gives “- ”, follow the same procedure for the right
liner.
(5) Reassemble the bearing housing, measure the squareness and repeat
the process until a satisfactory result has been obtained.
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