Mitsubishi Electric MR-J5 Series, Руководство пользователя

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9 USING A LINEAR SERVO MOTOR
9.2 Startup [G] [WG]
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■
Confirmation method
Confirm the positive direction of the linear servo motor and the increasing direction of the linear encoder in the following
procedure.
1.
In servo-off status, move the linear servo motor in the positive direction manually.
2.
Confirm the servo motor speed (in the positive and negative directions) at that time with MR Configurator2.
3.
The servo motor speed is a positive value when [Pr. PC27.0 Encoder pulse count polarity selection] is set to "0" (Linear
servo motor positive direction and linear encoder increasing direction), the positive direction of the linear servo motor
matches the increasing direction of the linear encoder, and the linear servo motor is operated in the positive direction. If
the positive direction of the linear servo motor does not match the increasing direction of the linear encoder, the servo
motor speed will be a negative value. The servo motor speed is a negative value when [Pr. PC27.0 Encoder pulse count
polarity selection] is set to "1" (Linear servo motor positive direction and linear encoder decreasing direction), the positive
direction of the linear servo motor matches the increasing direction of the linear encoder, and the linear servo motor is
operated in the positive direction.
Linear encoder resolution setting
Set the ratio to the linear encoder resolution with [Pr. PL02 Linear encoder resolution setting - Numerator] and [Pr. PL03
Linear encoder resolution setting - Denominator].
Precautions
• The setting values of these servo parameters are enabled after the power is cycled or the software is reset.
• If incorrect values are set for [Pr. PL02] and [Pr. PL03], the linear servo motor may not operate properly, or [AL. 027] or [AL.
042] may occur in the positioning operation and the magnetic pole detection.
■
Servo parameter setting
Set the values that apply to the following equation.
■ Servo parameter setting example
• When the linear encoder resolution is 0.5 μm
The following shows the simplified chart for the setting values of [Pr. PL02] and [Pr. PL03].
 Linear encoder resolution [µm]
0.01 0.02 0.05 0.1 0.2 0.5 1.0 2.0
Setting value [Pr. PL02] 1 1 1 1 1 1 1 2
[Pr. PL03] 100 50 20 10 5 2 1 1
[Pr. PL02 Linear encoder resolution setting - Numerator]
= Linear encoder resolution [μm]
[Pr. PL03 Linear encoder resolution setting - Denominator]
[Pr. PL02]
[Pr. PL03] 1
2
= Linear encoder resolution = 0.5 μm =