
B–63523EN–1/03
1. AXIS CONTROL
325
Kn
Kd
=
–360000 5 1
72000 10
=
–5
2
Both Kn and Kd are within the allowable range. No alarm is output.
(c) Command : G81.5 T1 C3.263 ;
Operation : Synchronization between the spindle and C–axis is
started at the ratio of a 3.263–degree rotation about
the C–axis to one spindle rotation.
Pm : (Number of pulses per spindle rotation) 1 rotation
→ 72000 1
Ps : (Amount of C–axis movement) CMR → 3263 5
Kn
Kd
=
3263 5
72000 10
=
3263
14400
Both Kn and Kd are within the allowable range. No alarm is output.
In this sample program, when T1 is specified for the master axis,
the synchronization ratio (fraction) of the CMR of the C–axis to the
denominator Kd can always be reduced to lowest terms, thus Kd
falls in the allowable range. So, the specifiable range of C is as
follows:
–99999999 v C v 99999999
(d)Command : G81.5 T10 C3.263 ;
Operation : Synchronization between the spindle and C–axis is
started at the ratio of a 3.263–degree rotation about
the C–axis to ten spindle rotations.
Pm : (Number of pulses per spindle rotation) 10
rotations → 72000 10
Ps : (Amount of the C–axis movement) CMR → 3263
5
Kn
Kd
=
3263 5
72000 10
=
3263
14400
In this case, an alarm is issued because Kd exceeds the specifiable
range.
(e) Command : G81.5 P10000 C–0.214 ;
Operation : Synchronization between the spindle and C–axis is
started at the ratio of a –0.214 degree rotation of the
C–axis to 10,000 feedback pulses from the pulse
coder of the spindle.
Pm : (Specified number of feedback pulses from the pulse
coder of the spindle) → 10000
Ps : (Amount of C–axis movement) CMR → –214 5
Kn
Kd
=
–214 5
10000
=
–107
1000
Both Kn and Kd are within the allowable range. No alarm is output.
(2)When the master axis is the spindle, the slave axis is the V–axis (linear
axis), and inch/metric conversion is performed
(a) For a millimeter machine and metric input
Command : G81.5 T1 V1.0 ;