Mitsubishi Electric MELSERVO-J4 Series Instruction Manual page 480

■For the incremental linear encoder
For the incremental linear encoder, the magnetic pole detection is required every time the power is turned on.
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 the parameter (first digit of [Pr. PL01]) for executing the 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
*1 When you turn off LSP (Forward rotation stroke end) or LSN (Reverse rotation stroke end) 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. 27 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]
14 USING A LINEAR SERVO MOTOR
478
14.3 Operation and functions
95 ms
15 s or less
Magnetic pole detection time
*1
LSP
Magnetic pole detection completion position
LM-H3
LM-F
48
*1
*2
LM-U2
Medium thrust Large thrust
(Continuous thrust: Less (Continuous thrust: 400
than 400 N) N or more)
30 60
LM-K2
48