Mitsubishi Electric MELSERVO-J4 series, Instruction Manual

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14 USING A LINEAR SERVO MOTOR
14.3 Operation and functions
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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
*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)
*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 LM-H3
LM-F LM-U2 LM-K2
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
15 s or less
ON
OFF
ON
OFF
ON
OFF
95 ms
Servo-on command
Base circuit
RD (Ready)
Magnetic pole detection time *1
LSN
*1
LSP
*1
Magnetic pole detection completion position
*2
Servo-on position
(Magnetic pole detection start position)