Mitsubishi Electric MELSERVO-J4 series, Instruction Manual

Page: 507 / 646

15 USING A DIRECT DRIVE MOTOR
15.3 Operation and functions
505
15
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.
■
Guideline of parameter settings
Set the parameters by referring to the following table.
■ 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.
■
Setting example
In this example, the final setting value of [Pr. PL09] is 49 (Setting value at the alarm occurrence = 70

0.7).
Operation from controller
To configure the absolute position detection system by using the direct drive motor, the battery and the absolute position
storage unit MR-BTAS01 are required.
For the incremental system, the magnetic pole detection is automatically performed at the first servo-on after the power-on.
For this reason, when performing the positioning operation, create the sequence which surely confirms the servo-on status as
the inter lock condition of the positioning command.
Servo status [Pr. PL09] setting (Guide value)
Small

Medium

Large
(10 or less (initial value) 50 or more)
Torques required for operation Small Large
Overload, overcurrent alarm Not frequently occurs Frequently occurs
Magnetic pole detection alarm Frequently occurs Not frequently occurs
Magnetic pole detection accuracy Low High
Existent
Non-existent
Alarm
Magnetic pole detection
[Pr. PL09] setting value
An alarm has occurred when the setting
value of [Pr. PL09] is set to "70". While increasing the setting value of [Pr. PL09], carry out the
magnetic pole detection repeatedly.
30 35 40 45 65 70