17. FULLY CLOSED LOOP SYSTEM
17 - 18
(b) Home position return using incremental linear encoder
When you use an incremental linear encoder, LZ (Encoder Z-phase pulse) from the servo amplifier
will be the home position (reference mark) of the linear encoder. Two or more home positions
(reference marks) should not be set. In addition, the home position return cannot be executed
without home position (reference mark).
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
1) Caution for passing the home position (reference mark)
An interval for turning on home position (reference mark) signal of the linear encoder has a
certain width. (Specifications differ depending on the linear encoders. For details, refer to "Linear
Encoder Instruction Manual".)
Example: When Z-phase is recognized at startup
B
A
Home position signal
A is recognized as
the on position.
B is recognized as
the on position.
The position which turns on a signal differs depending on the directions of home position passing.
When you need to set the home position return completion to the same position each time such
as dog type home position return, always start home position return with the same direction.
2) Caution for linear encoder which does not have the home position (Z-phase)
The linear encoder which does not have the home position (Z-phase), LZ (Encoder Z-phase
pulse) of the servo amplifier does not be outputted. The home position return can be performed
depending on specifications of controllers even if LZ (Encoder Z-phase pulse) is not outputted.
Check the controller specifications of the home position return.
Summary of Contents for MR-J4-100A(-RJ)
Page 19: ...10 MEMO ...
Page 75: ...1 FUNCTIONS AND CONFIGURATION 1 56 MEMO ...
Page 83: ...2 INSTALLATION 2 8 MEMO ...
Page 159: ...3 SIGNALS AND WIRING 3 76 MEMO ...
Page 203: ...4 STARTUP 4 44 MEMO ...
Page 351: ...7 SPECIAL ADJUSTMENT FUNCTIONS 7 40 MEMO ...
Page 365: ...8 TROUBLESHOOTING 8 14 MEMO ...
Page 387: ...9 DIMENSIONS 9 22 MEMO ...
Page 403: ...10 CHARACTERISTICS 10 16 MEMO ...
Page 553: ...12 ABSOLUTE POSITION DETECTION SYSTEM 12 30 MEMO ...
Page 567: ...13 USING STO FUNCTION 13 14 MEMO ...
Page 607: ...14 COMMUNICATION FUNCTION MITSUBISHI ELECTRIC GENERAL PURPOSE AC SERVO PROTOCOL 14 40 MEMO ...
Page 639: ...15 USING A LINEAR SERVO MOTOR 15 32 MEMO ...
Page 767: ...18 MR J4 03A6 RJ SERVO AMPLIFIER 18 84 MEMO ...
Page 856: ...APPENDIX App 41 ...
Page 905: ...MEMO ...