B–64113EN–1/01
1. AXIS CONTROL
31
To assign the compensation positions for each axis, specify the positive
direction or the negative direction relative to the compensation position
No. of the reference position. If the machine stroke exceeds the specified
range on either the positive direction or the negative direction, the pitch
error compensation does not apply beyond the range.
1024 compensation positions from No. 0 to 1023 are available on the
pitch error setting screen. Assign arbitrary positions for each axis using
parameters.
The number of the compensation position at the reference position
(parameter 3620), number of the compensation position having the
smallest value (parameter 3621), and number of the compensation
position having the largest value (parameter 3622) must be set for each
axis.
The name of each axis is displayed before the smallest compensation
position number on the pitch error setting screen.
The pitch error compensation positions are equally spaced to parameter
No. 3624. 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 2 mm.
⋅ Machine stroke: –400 mm to +800 mm
⋅ Interval between the pitch error compensation positions: 50 mm
⋅ No. of the compensation position of the reference position: 40
If the above is specified, the No. of the farthest compensation position in
the negative direction is as follows:
No. of the compensation position of the reference position – (Machine
stroke on the negative side/Interval between the compensation
positions) + 1
= 40 – 400/50 + 1= 33
No. of the farthest compensation position in the positive direction is as
follows:
No. of the compensation position of the reference position + (Machine
stroke on the positive side/Interval between the compensation
positions)
= 40 + 800/50= 56
Explanations
D Specifying the
compensation position
D Compensation position
number
D Interval of compensation
positions
Examples
D For linear axis