1. (1)Methods for magnetic pole detection
    There are the following two magnetic pole detection methods. Each of them has advantages and disadvantages.
    Magnetic pole detection method Advantage Disadvantage
    Position detection method
    (Initial value)
    1. 1.The magnetic pole detection has a high degree of accuracy.
    2. 2.The adjustment procedure at the magnetic pole detection is simple.
    1. 1.The travel distance at the magnetic pole detection is long.
    2. 2.For equipment with small friction, the initial magnetic pole detection error may occur.
    Minute position detection method
    1. 1.The travel distance at the magnetic pole detection is short.
    2. 2.Even for equipment with small friction, the magnetic pole detection is available.
    1. 1.The adjustment procedure at the magnetic pole detection is complex.
    2. 2.If a disturbance occurs during the magnetic pole detection,
      [AL. 027 Initial magnetic pole detection error] may occur.

  2. (2)Criteria for selecting the magnetic pole detection method
    • In the position detection method, the linear servo motor and direct drive motor move when the magnetic pole detection is started.
      The moving direction is indefinite. Therefore, not to move the machine at the time of magnetic pole detection, use the minute position detection method.
    • For the minute position detection method, the load to motor mass ratio or load to motor inertia ratio is required in the parameter setting for the magnetic pole detection.
      If these values are unknown, use the position detection method. Once the magnetic pole detection is performed using the position detection method and the load to motor mass ratio or load to motor inertia ratio value estimated by auto-tuning or other means is used, the minute position detection method can be used thereafter.

  3. (3)Procedure for magnetic pole detection method
    The magnetic pole detection is required to be performed multiple times while adjusting some parameters such as [Pr. PL09] Magnetic pole detection voltage level. The procedure varies depending on the motor type, servo amplifier type, and magnetic pole detection method. Always read the following manual to check the correct procedure.
  4. book iconMR-J5 User's Manual (Hardware)
  5. 10 USING A LINEAR SERVO MOTOR
  6. or
  7. 11 USING A DIRECT DRIVE MOTOR