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10 USING A DIRECT DRIVE MOTOR
10.2 Startup [G] [WG]
Setting of identification signal amplitude by minute position detection method
If [AL. 032 Overcurrent], [AL. 050 Overload 1], [AL. 051 Overload 2], or [AL. 0E1 Overload warning 1] occurs at the magnetic
pole detection by the minute position detection method, set a smaller value for [Pr. PL18 Magnetic pole detection - Minute
position detection method - Identification signal amplitude]. Basically, [Pr. PL18] does not need to be changed from the initial
value.
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.
• The magnetic pole detection improves in accuracy when performed with no load.
■
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
*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)
*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.
ON
OFF
ON
OFF
ON
OFF
100 ms
Servo-on command
Base circuit
RD (Ready)
15 s or less
Magnetic pole detection time
*1
LSP
*1
LSN
*1
Center of the direct drive motor rotation part
Servo-on position
(Magnetic pole detection start position)
Magnetic pole detection completion position
10 degrees or less
