
B–63010EN/02
4. DESCRIPTION OF PARAMETERS
103
Set the magnification ratios of CMR and DMR so that the weight of
positive inputs to the error counter equals that of negative inputs.
feedback pulse unit
Least command increment
CMR
=detection unit=
DMR
The feedback pulse unit varies according to the type of detector.
Feedback pulse unit =
the amount of travel per rotation of the pulse coder
the number of pulses per rotation of the pulse coder (2000, 2500, or 3000)
As the size of the reference counter, specify the grid interval for the
reference position return in the grid method.
Size of the reference counter = Grid interval/detection unit
Grid interval = the amount of travel per rotation of the pulse coder
The value set in the parameter is obtained as follows:
(1) When command multiplier is 1/2 to 1/27
Set value =
1
(Command multiplier)
+ 100
Valid data range: 102 to 127
(2) When command multiply 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] 2–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.
When using the linear scale with reference marks, set the space between
the mark–1 indications.
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.