16. FULLY CLOSED LOOP SYSTEM
16 - 15
(b) About proximity dog type home position return using incremental linear encoder
1) When the linear encoder home position (reference mark) exists in the home position return
direction
When an incremental linear encoder is used, the home position is the position per servo motor
revolution to the linear encoder home position (reference mark) passed through first after a home
position return start.
In the case of a proximity dog type home position return, the nearest position after proximity dog
off is the home position.
Set one linear encoder home position in the full stroke, and set it in the position that can always
be passed through after a home position return start.
Servo motor
speed
Linear encoder home position
Home position
Home position return speed
Creep speed
Home position return direction
ON
OFF
Proximity dog
signal
Reference home
position
Machine position
Equivalent to one servo motor revolution
0 r/min
2) When the linear encoder home position does not exist in the home position return direction
If the home position return is performed from the position where the linear encoder home position
(reference mark) does not exist, a home position return error occurs on the controller side. The
error contents differ according to the controller type. When starting a home position return at the
position where the linear encoder home position (reference mark) does not exist in the home
position return direction, move the axis up to the stroke end on the side opposite to the home
position return direction by JOG operation, etc. of the controller once, then make a home position
return.
Stroke end
Home position
Home position return speed
Creep speed
Home position return direction
ON
OFF
Proximity dog
signal
Machine position
Linear encoder home position
JOG operation
Home position returnable area
Home position non-returnable area
Servo motor
speed
0 r/min
Summary of Contents for MR-J4W2
Page 9: ...A 8 MEMO ...
Page 17: ...8 MEMO ...
Page 31: ...1 FUNCTIONS AND CONFIGURATION 1 14 MEMO ...
Page 95: ...4 STARTUP 4 20 MEMO ...
Page 169: ...6 NORMAL GAIN ADJUSTMENT 6 20 MEMO ...
Page 201: ...7 SPECIAL ADJUSTMENT FUNCTIONS 7 32 MEMO ...
Page 213: ...8 TROUBLESHOOTING 8 12 MEMO ...
Page 219: ...9 OUTLINE DRAWINGS 9 6 MEMO ...
Page 229: ...10 CHARACTERISTICS 10 10 MEMO ...
Page 295: ...13 USING STO FUNCTION 13 14 MEMO ...
Page 327: ...14 USING A LINEAR SERVO MOTOR 14 32 MEMO ...
Page 371: ...16 FULLY CLOSED LOOP SYSTEM 16 24 MEMO ...
Page 521: ...APPENDIX App 38 ...
Page 537: ...MEMO ...
Page 541: ......