
B-63330EN/03 4.DESCRIPTION OF PARAMETERS
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Synchronization
coefficient
Synchronous switch
Spindle
CNC
Detection unit
βp/rev
αp/rev
C-axis
Speed/current
control
Least command increment
0.001 deg
Command pulse
n/m
Gear ratio
A
Motor
Detector
Error
counter
×CMR
Slave axis
Detector
Gear ratio B
Error
counter
Follow-up
×CMR
Dummy
Spindle-to-detector gear ratio B:
1/1 (The spindle and detector are connected directly.)
Number of pulses from the detector of the spindle β:
80000 pulses/rev
(calculated assuming that four pulses are generated in one A/B
phase cycle)
C-axis gear ratio A:
1/36 (The C-axis rotates one turn while the motor rotates 36
turns.)
Number of pulses from the detector of the C-axis ¿: 1,000,000
pulses/rev
C-axis CMR: 1
Flexible feed gear n/m: 1/100
In this case, the number of pulses per spindle rotation is obtained as
follows:
80000×1/1 = 80000
So, set 80000 in parameter No. 5996.
The number of pulses per C-axis rotation by the detection unit is
obtained as follows:
1000000÷1/36×1/100=360000
In parameter No. 5997, set 360000.
Example 2: When the spindle-to-detector gear ratio B is 2/3 in the
above example (the detector rotates two turns while the spindle
rotates three turns)
In this case, the number of pulses per spindle rotation is obtained as
follows:
×
The result will be a fraction. In such a case, change the value set in
parameter No. 5997 while leaving the ratio of parameter Nos. 5996 to
5997 unchanged.
×