11. SETTING AND DISPLAYING DATA
If pitch error compensation data is specified, pitch errors of each axis can
be compensated in detection unit per axis.
Pitch error compensation data is set for each compensation point at the
intervals specified for each axis. The origin of compensation is the
reference position to which the tool is returned.
The pitch error compensation data is set according to the characteristics
of the machine connected to the CNC. The content of this data varies
according to the machine model. If it is changed, the machine accuracy
In principle, the end user must not alter this data.
Pitch error compensation data can be set with external devices such as the
Handy File (see V–8). Compensation data can also be written directly
with the MDI panel.
The following parameters must be set for pitch error compensation. Set
the pitch error compensation value for each pitch error compensation
point number set by these parameters.
In the following example, 33 is set for the pitch error compensation point
at the reference position.
34 35 36 37
34 35 36 3731 32 33
+3 –1 –1 +1 +2 –1 –3
Pitch error compensation value (absolute value)
Compensation number parameter
for the reference position (No.
Compensation number pa-
rameter for the compensa-
tion point having the largest
Compensation number parameter for
the compensation point having the
smallest value (No.3621)
Compensation interval parameter (No.3624)
value to be set
Number of the pitch error compensation point at the reference position
(for each axis) : Parameter 3620
Number of the pitch error compensation point having the smallest value
(for each axis) : Parameter 3621
Number of the pitch error compensation point having the largest value
(for each axis) : Parameter 3622
Pitch error compensation magnification (for each axis) : Parameter
Interval of the pitch error compensation points (for each axis) :
Displaying and Setting