
B–63523EN–1/03
1. AXIS CONTROL
61
For a machine tool with a long stroke, deviations in straightness between
axes may affect the machining accuracy. For this reason, when an axis
moves, other axes are compensated in detection units to improve
straightness. This improvement results in better machining accuracy.
When an axis (parameter Nos. 5711 to 5713) moves, the corresponding
compensation axis (parameter Nos. 5721 to 5723) is compensated.
That is, the compensation axis is compensated at the pitch error
compensation position (See 1.3.1) of the moving axis.
0 1 2 3 60 61 126 127
ab
c
d
a
b
g
e
Pitch error compensation points on moving axis
Machine coordinates for moving axis
a, b, c, d Compensation position numbers of the moving axis
(This number is originally a pitch error compensation
position number.)
a, b, g, e Compensation for compensation axis
Compensation amount for the compensation position
number
The compensation from point a to point b is calculated from the formula:
(b–a)/(b–a).
1.3.3
Straightness
Compensation
General
Example