Mitsubishi Electric MELSERVO-J5 User Manual page 369

Operation at magnetic pole detection
Precautions
• After the magnetic pole detection, check the positioning accuracy with the test operation (positioning operation function) of
MR Configurator2.
• When the absolute position linear encoder is used, if a gap is generated to the positional relation between the linear
encoder and the linear servo motor, perform the magnetic pole detection again.
• The magnetic pole detection improves in accuracy when performed with no load.
■For incremental encoder
For the incremental linear encoder, the magnetic pole detection is required every time the power is turned on or the software
is reset.
By turning on the servo-on command from the controller after the power-on, the magnetic pole detection is automatically
carried out. Therefore, there is no need to set [Pr. PL01.0 Servo motor magnetic pole detection selection] for executing
magnetic pole detection.
• Timing chart
ON
Servo-on command
OFF
ON
Base circuit
OFF
ON
RD (Ready)
OFF
*1 The magnetic pole detection time indicates the operation time when LSP (Forward rotation stroke end) and LSN (Reverse rotation
stroke end) are on.
• Linear servo motor movement (when LSP (Forward rotation stroke end) and LSN (Reverse rotation stroke end) are on)
Servo-on position
(Magnetic pole detection start position)
*1
LSN
Magnetic pole detection completion position
*1 When LSP (Forward rotation stroke end) or LSN (Reverse rotation stroke end) is turned off during the magnetic pole detection, the
operation of the magnetic pole detection is carried on to the opposite direction.
When both LSP and LSN are off, [AL. 027 Initial magnetic pole detection error] occurs.
*2 The following shows the pitch against the magnetic pole.
Linear servo motor series
Pitch against magnetic pole [mm]
100 ms
15 s or less
*1
Magnetic pole detection time
*1
LSP
*2
LM-H3 LM-U2
LM-F
Medium thrust
(Continuous thrust: Less
than 400 N)
48 30
Large thrust
(Continuous thrust: 400 N
or more)
60
10 USING A LINEAR SERVO MOTOR
10.3 Startup [A]
10
LM-K2 LM-AJ
48 20
367