PDF Fanuc Power Mate i-D/H Parameter Manual

B63180EN/02
4. DESCRIPTION OF PARAMETERS
61
Setting command multiply (CMR), detection multiply (DMR), and the
capacity of the reference counter
least command
increment
X CMR
Error counter
X DMR
Reference
counter
DA
Converter
Position detector
To velocity control
Feedback pulse
Detection
unit
+
Fig.4.12 (a) CMR, DMR, and the Capacity of the Reference Counter
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.

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