Home Position Return - Mitsubishi Electric MR-J4W2-0303B6 Instruction Manual

14. USING A LINEAR SERVO MOTOR
2) Specify the setting value that is an approximately 70% of the value set when [AL. 50 Overload 1],
[AL. 51 Overload 2], [AL. 33 Overvoltage], [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. 33 Overvoltage], [AL. E1 Overload warning 1], and [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 to check there is no
problem.
(c) Setting example
Linear encoder magnetic
pole detection
[Pr. PL09] setting
Occurring
Alarm
Not occurring
In this example, the final setting value of [Pr. PL09] is 49 (Setting value at the alarm occurrence = 70
× 0.7).

14.3.3 Home position return

(1) Incremental linear encoder
CAUTION
30 35 40
While increasing the setting value of [Pr. PL09], carry out the
magnetic pole detection repeatedly.
POINT
The incremental linear encoder and the absolute position linear encoder have
different reference home positions at the home position return.
If the resolution or the stop interval (the third digit of [Pr. PL01]) of the linear
encoder is large, it is very dangerous since the linear servo motor may crash into
the stroke end.
45 65
14 - 16
70
An alarm has occurred when the setting
value of [Pr. PL09] is set to "70".