[Al. 027_Initial Magnetic Pole Detection Error] - Mitsubishi Electric Melservo-J5 MR-J5 Series User Manual

[AL. 027_Initial magnetic pole detection error]

• The initial magnetic pole detection cannot be performed properly.
[AL. 027.1_Initial magnetic pole detection - Abnormal termination]
Cause
1.
A moving part collided against the machine.
2.
The wiring of the servo motor power cable is
incorrect.
3.
The linear encoder resolution setting differs
from the setting value.
4.
The mounting direction of the linear encoder is
incorrect.
5.
An excitation level of the magnetic pole
detection voltage level is small.
[AL. 027.2_Initial magnetic pole detection - Time out error]
Cause
1.
Servo-on was enabled when the primary side
of linear servo motor and rotor of direct drive
motor was not stopped.
2.
Only one of the limit switches is on during
magnetic pole detection.
In the magnetic pole detection, only one of the
limit switches is turned off.
3.
The excitation level in the magnetic pole
detection is small.
Check/action method
If the moving part collides, move the start position of the magnetic pole
detection.
Check the motor power cable for abnormality.
Refer to "Power cable wiring diagram" in the following manual.
MR-J5 Linear Servo Motor User's Manual
Refer to "Direct drive motor power cable wiring diagram" in the following
manual.
MR-J5 Direct Drive Motor User's Manual
Check the setting of [Pr. PL02 Linear encoder resolution setting - Numerator]
and [Pr. PL03 Linear encoder resolution setting - Denominator].
Check the polarities of the linear encoder and the linear servo motor.
If the mounting direction is incorrect, mount the encoder correctly. Change the
setting of "Encoder pulse count polarity selection" as required.
[A]: [Pr. PC45.0 Encoder pulse count polarity selection]
MR-J5-A User's Manual (Parameters)
[G] [WG]: [Pr. PC27.0 Encoder pulse count polarity selection]
MR-J5-G/MR-J5W-G User's Manual (Parameters)
Refer to "Setting of linear encoder direction and linear servo motor direction" in
the following manual.
MR-J5 User's Manual (Hardware)
• When in position detection method
Check if the travel distance in the magnetic pole detection is small. If the travel
distance is small, set a larger value in [Pr. PL09 Magnetic pole detection -
Voltage level].
• When in minute position detection method
Check if the travel distance in the magnetic pole detection is large, or if a
vibration is occurring. If the travel distance is large or a vibration is occurring,
refer to the magnetic pole detection method, and review the setting of [Pr.
PL17.0 Response selection] and [Pr. PL17.1 Load to motor mass ratio/load to
motor inertia ratio selection].
Refer to "Magnetic pole detection" in the following manual.
MR-J5 User's Manual (Hardware)
Check/action method
Stop the linear servo motor and the direct drive motor, and then turn the servo-
on again.
Check the limit switches and remove the cause.
Move the start position of the magnetic pole detection.
• When in position detection method
Check if the travel distance in the magnetic pole detection is small. If the travel
distance is small, set a larger value in [Pr. PL09 Magnetic pole detection -
Voltage level].
1 SERVO AMPLIFIER TROUBLESHOOTING
1.3 Handling methods for alarms/warnings
1
Model
[A]
[G]
[WG]
Model
[A]
[G]
[WG]
31