16. USING A DIRECT DRIVE MOTOR
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2) Execute the magnetic pole detection. (Refer to (2) (a) 1), 2) of this section.)
3) After the completion of the magnetic pole detection, change [Pr. PL01] to "_ _ _ 0" (Magnetic pole
detection disabled).
[Pr. PL01]
Magnetic pole detection disabled
0
After the magnetic pole detection, by turning on the Z-phase pulse of the direct drive motor in
JOG operation and by disabling the magnetic pole detection function with [Pr. PL01], the
magnetic pole detection after each power-on is not required.
(3) Magnetic pole detection method setting
Set the magnetic pole detection method using the first digit of [Pr. PL08] (Magnetic pole detection
method selection).
[Pr. PL08]
Magnetic pole detection method selection
0: Position detection method
4: Minute position detection method
(4) Setting of the magnetic pole detection voltage level by the position detection method
For the magnetic pole detection by the position detection method, set the voltage level with [Pr. PL09
Magnetic pole detection voltage level]. For the magnetic pole detection by the minute position detection
method, the voltage level setting is not required.
(a) Guideline of parameter settings
Set the parameters by referring to the following table.
[Pr. PL09] setting
(guide value)
Servo status
Small ← Medium → Large
(10 or less (initial value) 50 or more)
Torques required for operation Small Large
Overload, overcurrent alarm Seldom occurs Frequently occurs
Magnetic pole detection alarm Frequently occurs Seldom occurs
Magnetic pole detection accuracy Low High
(b) Setting procedure
1) Perform the magnetic pole detection, and increase the setting value of [Pr. PL09 Magnetic pole
detection voltage level] until [AL. 50 Overload 1], [AL. 51 Overload 2], [AL. E1 Overload warning
1], and [AL. EC Overload warning 2] occur. Increase the setting value by five as a guide value.
When these alarms and warnings occur during the magnetic pole detection by using MR
Configurator2, the test operation of MR Configurator2 automatically completes and the servo-off
status is established.
2) Specify the setting value that is an approximately 70% of the value set when [AL. 50 Overload 1],
[AL. 51 Overload 2], [AL. E1 Overload warning 1], and [AL. EC Overload warning 2] occurred as
the final setting value. However, if [AL. 27 Initial magnetic pole detection error] occurs with this
value, specify a value intermediate between the value set at [AL. 50 Overload 1], [AL. 51
Overload 2], [AL. E1 Overload warning 1], or [AL. EC Overload warning 2] and the value set at
the magnetic pole detection alarm as the final setting value.
3) Perform the magnetic pole detection again with the final setting value.
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