
B–63380EN/02
4. DESCRIPTION OF PARAMETERS
61
(1) T series
Least input increment
Least
command
increment
IS–B Millimeter Millimeter 0.001 mm (diameter specification) 0.0005 mm
machine input
0.001 mm (radius specification) 0.001 mm
Inch input 0.0001 inch (diameter specification) 0.0005 mm
0.0001 inch (radius specification) 0.001 mm
Inch Millimeter 0.001 mm (diameter specification) 0.00005 inch
machine input
0.001 mm (radius specification) 0.0001 inch
Inch input 0.0001 inch (diameter specification) 0.00005 inch
0.0001 inch (radius specification) 0.0001 inch
(2) F series
Increment
system
Least input increment and least com-
mand increment
IS–B IS–C Units
Millimeter machine 0.001 0.0001 mm
Inch machine 0.0001 0.00001 inch
Rotation axis 0.001 0.0001 deg
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.4.9 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
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: