
B–63503EN–1/01
1. AXIS CONTROL
32
[Valid data range] 0 to 99999999
The pitch error compensation positions are arranged with equally spaced.
Set the space between two adjacent positions for each axis.
The minimum interval between pitch error compensation positions is
limited and obtained from the following equation:
Minimum interval of pitch error compensation positions = maximum
feedrate (rapid traverse rate)/3750
Unit:
· Minimum interval of pitch error compensation positions: mm, inches,
deg.
· Maximum feed rate: mm/min, inch/min, deg/min
[Example] When the maximum rapid traverse rate is 15000 mm/min, the minimum
interval between pitch error compensation positions is 4 mm.
WARNING
1 Compensation value range
Compensation values can be set within the range from –7
x compensation magnification (detection unit) to +7 x
compensation magnification (detection unit). The
compensation magnification can be set for each axis within
the range from 0 to 100 in parameter 3623.
2 Intervals of compensation positions
The pitch error compensation positions are arranged with
equally spaced. Set the space between two adjacent
positions for each axis to the parameter (No. 3624).
3 Pitch error compensation of the rotary axis
For the rotating axis, the interval between the pitch error
compensation positions shall be set to one per integer of the
amount of movement (normally 360°) per rotation. The sum
of all pitch error compensation amounts per rotation must be
made to 0. Also, set the same compensation value to a
position and the same position with one rotation.
4 Conditions where pitch error compensation is not
performed
Note that the pitch error is not compensated in the following
cases:
· When the machine is not returned to the reference
position after turning on the power. This excludes the
case where an absolute position detector is employed.
· If the interval between the pitch error compensation
positions is 0.
· If the compensation position Nos. on the positive or
negative direction do not fall within the range of 0 to
1023.
· If the compensation position Nos. do not conform to the
following relationship:
Negative side x Reference position < Positive side
Warning