YASKAWA SIEMENS CNC Series, Maintenance Manual, Serviceman Handbook

Page: 278 / 373

Drive set-up procedure
14.3.5 Return to reference point
14-68
Fig. 14.4 Emergency stop processing
14.3.5 Return to reference point
For return to reference point, the typical motion is shown in the fig 14.5, being different
from the conventional specification especially on the following points.
• After dog detection, motion pauses on the dog. (When the dog is not long enough, you
must take some measures, for example retaining the signal of dog with a ladder.)
• Encoder C phase detection should be done by moving to the opposite direction to the
dog.
(However, if encoder C phase is preceding to the dog, it is possible to specify the direc-
tion with MD34050).
The primary machine data on return to reference point is as follows.
• MD34000 REFP_CAM_IS_ACTIVE (For each axis)
Meaning: Return to reference point dog setting
Setting value: 0---No dog
1---Dog
Note: For spindles, specify "0" (no dog) for orientation.
Emergency stop
(switch -> PLC -> CNC)
Actual speed
/emergency stop
(CNC -> drive)
Brake
(drive)
servo axis is less than 100 min -1 , servo-off delay (MD3426)
Servo-off
Servo axis DB ON
Speed
reference
or
positioning
reference
Speed reference
0
speed set with MD36060
Torque
0
Acceleration determined with MD36610
EMERGENCY_STOP_WAIT_TIME TACTOR_OFF_DELAY_TIME
Torque determined with MD3356