Mitsubishi Electric MELSERVO-J5 MR-J5-G Series, Руководство пользователя

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10 USING A LINEAR SERVO MOTOR
10.3 Startup [A]
• Linear servo motor movement (when LSP (Forward rotation stroke end) or LSN (Reverse rotation stroke end) is off)
When LSP or LSN is off at servo-on, the magnetic pole detection is performed as follows.
*1 The following shows the pitch against the magnetic pole.
■
For absolute position linear encoder
The magnetic pole detection is required in the following cases.
• When the system is set up (at initial startup of equipment)
• After a servo amplifier is replaced
• After a linear servo motor (primary-side or secondary-side) is replaced
• After a linear encoder (scale or head) is replaced or remounted
If a gap is generated to the positional relation between the linear encoder and the linear servo motor, perform the magnetic
pole detection again.
1.
Execute the magnetic pole detection.

Page 354 Operation at magnetic pole detection

Page 354 For incremental encoder
2.
After the completion of the magnetic pole detection, change [Pr. PL01.0 Servo motor magnetic pole detection selection]
to "0" (magnetic pole detection disabled).
When [Pr. PL01.0] is set to "0" (magnetic pole detection disabled) after the magnetic pole detection, the magnetic pole
detection at each power-on is not required.
How to replace servo amplifier without magnetic pole detection
Refer to the following.

Page 357 How to replace servo amplifier without magnetic pole detection
Linear servo motor series LM-H3
LM-F LM-U2 LM-K2 LM-AJ
Medium thrust
(Continuous thrust: Less
than 400 N) Large thrust
(Continuous thrust: 400 N
or more)
Pitch against magnetic pole [mm] 48 30 60 48 20
Servo parameter Description
PL01.0 Servo motor magnetic pole detection selection
0: Magnetic pole detection disabled
1: Magnetic pole detection at initial servo-on after cycling the power
5: Magnetic pole detection at every servo-on
Initial value: 1 (magnetic pole detection at initial servo-on after cycling the power)
LSN LSP
The linear servo motor moves to the magnetic pole detection start position
upon servo-on, and the magnetic pole detection is executed.
Magnetic pole detection
start position
Servo-on position
Magnetic pole detection completion position
*1
The linear servo motor reciprocates several times and returns to the magnetic pole detection start position
to complete the magnetic pole detection, and then changes into the servo-lock status. At this time, there
may be a gap, approximately a quarter of the pitch against magnetic pole, from the start position.