Mitsubishi Electric MELSERVO-JET User Manual page 111

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.
[Pr. PL02 Linear encoder resolution setting - Numerator]
[Pr. PL03 Linear encoder resolution setting - Denominator]
■Servo parameter setting example
• When the linear encoder resolution is 0.5 µm
[Pr. PL02]
= Linear encoder resolution = 0.5 µm =
[Pr. PL03]
The following shows the simplified chart for the setting values of [Pr. PL02] and [Pr. PL03].

Linear encoder resolution [µm]
0.01
Setting value [Pr. PL02] 1
[Pr. PL03] 100
Settings when connecting an A/B/Z-phase differential output linear encoder
When connecting an A/B/Z-phase differential output encoder, set [Pr. PC26.0 A/B/Z-phase input encoder connection setting
selection] to "2". If an A/B/Z-phase input encoder is connected to the servo amplifier while [Pr. PC26.0] is set to "0", [AL.
016.3] will occur.
Settings when connecting the LM-AJ series
The LM-AJ series is not equipped with a thermistor that can be connected to a servo amplifier. It is equipped only with a
thermal protector that can be connected to an external relay. For that reason, when driving the LM-AJ series, set [Pr. PD12.3
Servo motor thermistor - Enabled/disabled selection] to "1" to disable the thermistor. If this setting is not configured, [AL. 046.3
Thermistor disconnected error] will occur.
= Linear encoder resolution [µm]
1
2
0.02 0.05 0.1
1 1 1
50 20 10
0.2 0.5 1.0
1 1 1
5 2 1
8 USING A LINEAR SERVO MOTOR
2.0
2
8
1
109
8.2 Startup