Mitsubishi Electric MR-J4 Instruction Manual page 607

16. USING A DIRECT DRIVE MOTOR
2) Direct drive motor movement (when LSP and LSN are on)
3) Direct drive motor movement (when LSP or LSN is off)
When LSP or LSN is off at servo-on, the magnetic pole detection is carried out as follows.
Magnetic pole detection
start position
(b) Absolute position detection system
Perform the magnetic pole detection in the following procedure.
1) Set [Pr. PL01 Linear servo motor/DD motor function selection 1] to "_ _ _ 1" (Magnetic pole
detection at first servo-on).
(Note) LSN
Note. When the stroke limit (LSP or LSN) turns off during the magnetic pole detection, the
magnetic pole detection is carried on to the opposite direction. When both LSP and
LSN are off, [AL. 27 Initial magnetic pole detection error] occurs.
LSN
POINT
When the absolute position detection system is used with the following timing,
the magnetic pole detection is required.
System set-up (at the first startup of equipment)
When the Z-phase pulse of the direct drive motor is not turned on at the
system setup (When the Z-phase pulse of the direct drive motor can be turned
on manually, the magnetic pole detection is not required.)
After a direct drive motor is replaced
When [AL. 25 Absolute position erased] has occurred
Turn on the Z-phase pulse of the direct drive motor in JOG operation from the
controller after the magnetic pole detection.
[Pr. PL01]
1
Center of direct drive motor rotation part
LSP (Note)
Servo-on position (Magnetic pole detection start position)
Magnetic pole detection completion position
10 degrees or less
Center of direct drive motor rotation part
LSP
Servo-on position
After the machine moves to the position where the stroke limit
(LSP or LSN) is set, the magnetic pole detection starts.
Magnetic pole detection completion position
10 degrees or less
Magnetic pole detection at first servo-on (initial value)
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