Torque Limit Changing Dog Type Home Position Return - Mitsubishi Electric MELSERVO-J3 Series Instruction Manual

16. INDEXER POSITIONING OPERATION

16.9.2 Torque limit changing dog type home position return

A home position return method using a proximity dog. With deceleration started at the front end of the proximity
dog, the position where the first Z-phase signal is given past the rear end of the dog or a motion has been
made over the home position shift distance starting from the Z-phase signal is defined as a home position. A
limit can be put on the servo motor torque at home position return execution and at stop separately.
(1) Devices, parameters
Set the input devices and parameters as follows.
Item
Home position return mode
selection
Torque limit changing dog type
home position return
Home position return direction
Dog input polarity
Home position return speed
Creep speed
Home position shift distance
Home position return
acceleration/deceleration time
constants
Torque limit value at home position
return execution
Torque limit value at stop
(2) Length of proximity dog
Adjust the length of proximity dog or home position return speed so that the servo motor speed reaches to
the creep speed while detecting the proximity dog (DOG).
V td
CDV
L
1
60 2 CMX
L : Angle that proximity dog holds on the circumference of machine side [degree]
1
V : Home position return speed of motor side [r/min]
td : Deceleration time of motor side [s]
Device/Parameter used
Operation mode selection 1 (RYn6)
Operation mode selection 2 (RYn7)
Parameter No.PC02
Parameter No.PC03
Parameter No.PD16
Parameter No.PC04
Parameter No.PC05
Parameter No.PC06
Point table No.1
Point table No.PA11
Point table No.PA12
Point table No.PC35
360
Turn off RYn6.
Turn off RYn7.
Refer to section 16.9.1 (2) and choose
home position return direction.
Refer to section 16.9.1 (2) and choose dog
input polarity.
Set speed until detection of dog.
Set speed after detection of dog.
Set when shifting the home position starting
at the first Z-phase signal after passage of
proximity dog rear end.
Use the acceleration/deceleration time
constants of point table No.1.
Set the torque limit value for the forward
rotation direction at home position return
execution.
Set the torque limit value for the reverse
rotation direction at home position return
execution.
Set the torque limit value at stop.
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Description
C: Torque limit changing dog type
home position return is selected.