Mitsubishi Electric MELSERVO-J3W Series, Instruction Manual

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13. USING A LINEAR SERVO MOTOR
13 - 21
(3) Setting of the magnetic pole detection voltage level
For the positioning detection method, set the magnetic pole detection voltage level with the parameter
No.PS09 (magnetic pole detection voltage level). Voltage level setting is not required when detecting
magnetic poles by the minute position detection method.
(a) Guideline of parameter settings
Set the parameters referring to the following table.
Parameter No.PS09 setting value
(Guide value)
Servo status
Small Medium Large
(Less than 10 (factory setting) More than 50)
Thrust at operation Small Large
Overload, overcurrent alarm Not frequently occurred Frequently occurred
Magnetic pole detection alarm Frequently occurred Not frequently occurred
Magnetic pole detection accuracy Low High
(b) Setting procedure
1) By carrying out the magnetic pole operation, make the setting of parameter No.PS09 (magnetic pole
detection voltage level) larger until the overload 1 (50. ), overload 2 (51. ), overvoltage (33.1),
overload warning 1 (E1. ) and overload warning 2 (EC.1) occur. To get a rough idea, make it lager
in "5". When these alarms and warnings occur during the magnetic pole detection by MR
Configurator, the test operation of MR Configurator is automatically completed and servo off status
established.
2) Set the final setting value to approximately 70 of the value which is set at the occurrence of the
overload 1 (50. ), overload 2 (51. ), overvoltage (33.1), overload warning 1 (E1. ) and overload
warning 2 (EC.1). However, in the case where the initial magnetic pole detection error (27. ) occurs
with this setting value, set the final setting value to the value intermediate between the setting value
at the occurrence of the overload 1 (50. ), overload 2 (51. ), overvoltage (33.1), overload warning
1 (E1. ), overload warning 2 (EC.1) and the setting value at the occurrence of the magnetic pole
detection alarm.
3) Carry out the magnetic pole detection again with the final setting value.
(c) Setting example
30 35 40 45 65 70
Linear encoder
magnetic pole detection
Overload and overcurrent alarm
Existence or nonexistence
Parameter No.PS09 setting value
Carry out the magnetic pole detection repeatedly while making
the setting value of the parameter No.PS09 larger. An alarm has occurred
when the setting value
of the parameter
No.PS09 is set to 70.
Here, the final setting value of the parameter No.PS09 is set to 49 (the setting value at the occurrence of
the overload and overcurrent alarm 70 0.7).