25
PUMA 480LM
P48LMISE98
9.2 Parallelism between center line of spindle and Z-axis movement
In general, the parallelism should be measured using the test bar but it is rarely available
on site. Use an on-site workpiece as an alternative to the test bar.
▪ If the test bar is not available on site and making a workpiece does not work out either,
use the outer-diameter side of the chuck as an alternative.
Install the indicator on the tool holder of the turret, and present the gauge to the
①
highest point of the chuck in the X-axis movement (the gauge passes through the
center line of the chuck while lowering the X axis).
While rotating the chuck manually, check the runout changes of the gauge and stop
②
rotating the chuck at the middle point of the changes.
Move the Z axis by about 100mm and measure the parallelism
③
between center line of
the spindle and Z-axis movement.
▪ Target: below 0.005 mm/100 mm
1) Insert a workpiece (made of soft metal such as
aluminum in Φ50×L150 200) into the chuck
∼
and perform the rough cut then finishing cut.
2) Use the micrometer to measure the overall
length between two points (“A”, “B”).
▪ If the difference between A and B is more
than 0.01mm/100mm, you must adjust the
head stock.
3) Adjusting the head stock
Install the indicator on the tool holder of the
turret. While moving the Z axis, check the X-
axis deviations (normally, no deviation is
allowed) and set the end of the workpiece to 0.
Loosen the spindle belt.
※
Use the 17mm L
②
-wrench to loosen the bolts (7-BB 20×80) on the head stock slightly.
If B is greater than A in step above, tighten C; if not, tighten D approximately 2.5
③
②
times of the error while reading the indicator.
When done, tighten the head stock bolts and repeat processing the workpiece until
④
you get a satisfactory result.
Target: below 0.001 mm/100 mm
※
공작물 (Φ50×L150)
Chuck
공작물 (Φ50×L150)
Chuck
Chuck
공작물 (Φ50×L150)
“
A
”
“
B
”
Workpiece
(
Φ
50×L150)
Workpiece
(
Φ
50×L150)
Workpiece
(
Φ
50×L150)