
B-63944EN/02 PROGRAMMING 19.HIGH-SPEED CUTTING FUNCTIONS
- 565 -
be set into speed parameters Nos. 19541 to 19544 as ratio to the rapid
traverse speed (parameter No. 1420).
Any acceleration setting point for which the speed parameter (Nos.
19541 to 19544) is set to 0 will be skipped, and the next point whose
speed parameter is set to a non-zero value will be joined together as
acceleration pattern.
The accelerations at P0 to P5 are to be set into acceleration parameters
Nos. 19545 to 19568 as ratio to the reference acceleration. If any of
the acceleration parameters Nos. 19545 to 19568 is set to 0, the
acceleration is assumed 100% (Reference acceleration). Acceleration
parameters should be set to 0 at the acceleration setting point whose
speed parameter is set to 0.
If this function is enabled and parameter No.1671 for an axis are set to
0, the following values are assumed as the reference acceleration for
that axis:
1000.0mm/sec
2
, 100.0inch/sec
2
, 100.0 deg/sec
2
- Example of setting acceleration pattern data
In this example, the machine is equipped with the α30/4000is.
Motor speed at rapid traverse is 3000 (min
-1
).
0
50
100
150
0 1000 2000 3000 4000
Speed(min
-1
)
Torque(Nm)
Fig. 19.3 (d) Speed-torque characteristics of model α30/4000is
Specifications of the motor model α30/4000is
Rotor inertia :0.0099(Kgm
2
)
Maximum torque :100(Nm) Speed 0 to 2000(min
-1
)
Torque at rapid traverse :79(Nm) Speed 3000(min
-1
)
Minimum torque :58(Nm) Speed 4000(min
-1
)
It assumes that 10 (Nm) is needed for the friction torque, so that the
torque for acceleration/deceleration is shown as the following figure.
Because the friction torque is different on each machine, it is
necessary to observe the actual torque output on the machine.
Maximum torque :90(=100-10)(Nm) Speed 0 to 2000(min
-1
)
Torque at rapid traverse :69(=79-10)(Nm) Speed 3000(min
-1
)
Minimum torque :48(=58-10)(Nm) Speed 4000(min
-1
)