Doosan DVF5000 - Spindle Centerline and Z-Axis Feed Parallelism

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6. Machine Accuracy Measurement and Adjustment
6.13 Spindle centerline and Z-axis feed parallelism
1) Measurement
Set up a test bar on the Spindle and an indicator on the Table. Contact the gage at the
highest point at the end of the test bar. Measure the spindle run-out by rotating the
spindle by hand. Stop the spindle at the middle point between the max. and min. run-
out.
Measure the difference between the entrance and end of the test bar by feeding the Z-
axis.
▶ Measurement position : Height of the same block position of the Y-
150. and Y150.
positions
▶ Tolerance : 0.010mm / 300mm
2
) Adjustment
In general, it is highly unlikely that deformations of the axial or spindle squareness will
occur in an L/M guide machine. However, in the case of squareness deformation due to
a severe collision, etc., the squareness can be corrected by adjusting the thickness of
the liner to be assembled in the spindle housing assembly area.
※ In this case, it must be corrected only after loosening the spindle housing fixing bolt
to see if it has been pushed to one side due to an unexpected impact, and since this
accuracy is related to
“
6.7 Spindle centerline and X-axis movement squareness
”
for the X-Z direction and
“
6.8 Spindle centerline and Y-axis movement
squareness
”
for the Y-Z direction, take the measurement first and review the error
amount and direction before making any adjustment
.
Table
Z direction
Test
Bar
Y-Z
direction
X-Z direction