Mitsubishi Electric MELSERVO-J5 User Manual page 407

■For incremental system
For the incremental system, 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.
• Direct drive motor movement (when LSP and LSN are on)
Center of the direct drive motor rotation part
*1 *1
LSN LSP
Servo-on position
(Magnetic pole detection start position)
Magnetic pole detection completion position
10 degrees or less
*1 When LSP (Forward rotation stroke end) or LSN (Reverse rotation stroke end) is turned off during the magnetic pole detection, 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.
• Direct drive motor movement (when LSP or LSN is off)
When LSP or LSN is off at servo-on, the magnetic pole detection is performed as follows.
LSN
Magnetic pole
detection start
position
100 ms
15 s or less
*1
Magnetic pole detection time
Center of the direct drive motor rotation part
LSP
Servo-on position
After the motor moves to the position where LSP or
LSN is set, the magnetic pole detection starts.
Magnetic pole detection completion position
10 degrees or less
11 USING A DIRECT DRIVE MOTOR
11.2 Startup [G] [WG]
11
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