How To Replace Servo Amplifier Without Magnetic Pole Detection - Mitsubishi Electric MELSERVO-J5 User Manual
Ac servo system
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Also See for MELSERVO-J5:
- User manual (580 pages) ,
- Sample screen manual (128 pages) ,
- Introduction manual (112 pages)
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• 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.
Magnetic pole detection
LSN
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.
*1 The following shows the pitch against the magnetic pole.
Linear servo motor series
Pitch against magnetic pole [mm]
■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).
Servo parameter
PL01.0
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
10 USING A LINEAR SERVO MOTOR
368
10.3 Startup [A]
The linear servo motor moves to the magnetic pole detection start position
upon servo-on, and the magnetic pole detection is executed.
Servo-on position
start position
LSP
Magnetic pole detection completion position
LM-H3
LM-F
48
Description
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)
*1
LM-U2
Medium thrust
(Continuous thrust: Less
than 400 N)
30
Large thrust
(Continuous thrust: 400 N
or more)
60
LM-K2
LM-AJ
48
20
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