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Appendix 8 Stored Pitch Error Compensation Function
345
Appendi
x
Note: The data in “( )” is the measured result is incremental value, i.e. positive error indicates excessive
movement, and negative error indicates insufficient movement.
Compensation point 0 corresponds to the reference point ;compensation point 1 corresponds to
the one after the reference point moveing 10000 μ m along the positive direction; hereafter, a
compensation point is made at regular interval (every 1000 μ m). Therefore, the compensation number
127 is set at the po1270000 μ m. A compensation value is set at the compensation point 1
when the tool moves within the range 0~10000 μ m; A compensation value is set at the compensation
point 2 when the tool moves within the range 10000um
～
20000 μ m; The compensation value at
compensation point n is set when the tool moves within the range:
（
n
－
1
）
×
（
compensation interval
）
to n×
（
compensation interval
）
.
According to the measured result in above, the parameters are set as follows:
—
set the parameter No. 24 to 1
— set the parameter No. 39 to 0
Set the parameter No. 163 to 10000
Machine Position Measured Result Corresponding
Parameters Number
Compensation
Value
0 1000 0
00
～
10000
0 1001 0
10000
～
20000
+7 1002 -7
20000 ～ 30000
-6 1003 6
30000
～
40000
+4 1004 -4
… … … …
1260000
～
1270000
+2 1127 -2
When the X axis moves from reference point to the po30000, the total pitch error
compensation amount is as follows:
（
+7
）
+
（
-6
）
+
（
+4
）
=5
(2). Example 2: Take the X axis as an example, the pitch error compensation origin point is 60, the
compensation interval is 10000.
Note: The data in “( )” is the measured result is incremental value, i.e. positive error indicates excessive
movement, and negative error indicates insufficient movement.
Compensation point 60 corresponds to the reference point; compensation point 61
corresponds to the po10000 μ m; hereafter, a compensation point is made at regular interval
(every 1000 μ m). compensation point 59 corresponds to the position -10000 μ m; hereafter, a
compensation point is made at regular interval (every -1000 μ m); compensation point 0 is set at the
position -600000; The compensation value at compensation point n is set when the tool moves within
the range: (n
－
61)× (compensation interval) to (n-60)× (compensation interval).
According to the measured result in above, the parameters are set as follows:
— set the parameter No. 24 to ×1
— set the parameter No. 39 to 60
— set the parameter No. 163 to 10000