
B–63173EN–1/01
1. AXIS CONTROL
39
(2)When command multiplier is 1 to 48
Set value = 2 command multiplier
Valid data range: 2 to 96
NOTE
When command multiplier is 1 to 48, the set value must be
determined so that an integer can be set for command
multiplier.
1821 Reference counter size for each axis
[Data type] Two–word axis
[Valid data range] 0 to 99999999
Set the size of the reference counter.
NOTE
When this parameter has been set, the power must be
turned off before operation is continued.
1825 Servo loop gain for each axis
[Data type] Word axis
[Unit of data] 0.01 s
–1
[Valid data range] 1 to 9999
Set the loop gain for position control for each axis.
When the machine performs linear and circular interpolation (cutting), the
same value must be set for all axes. When the machine requires
positioning only, the values set for the axes may differ from one another.
As the loop gain increases, the response by position control is improved.
A too large loop gain, however, makes the servo system unstable.
The relationship between the positioning deviation (the number of pulses
counted by the error counter) and the feedrate is expressed as follows:
Positioning deviation =
feedrate
60
(loop gain)
Unit : Positioning deviation: mm, inches, or deg
Feedrate: mm/min, inches/min, or deg/min
Loop gain: s
–1