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9 USING A LINEAR SERVO MOTOR
9.2 Startup [G] [WG]
Setting
Setting of linear servo motor series and linear servo motor type
Set the linear servo motor series and linear servo motor type with [Pr. PA17 Servo motor series setting] and [Pr. PA18 Servo
motor type setting].
Setting of linear encoder direction and linear servo motor direction
Set [Pr. PC27.0 Encoder pulse count polarity selection] so that the positive direction of the linear servo motor matches the
increasing direction of the linear encoder feedback.
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Servo parameter setting method
1.
Confirm the positive direction of the linear servo motor. [Pr. PA14] determines the relation of the travel direction of the
linear servo motor under commands. Refer to the following table.
The positive and negative directions of the linear servo motor are as follows.
2.
Confirm the increasing direction of the linear encoder.
3.
If the positive direction of the linear servo motor matches the increasing direction of the linear encoder, set [Pr. PC27.0
Encoder pulse count polarity selection] to "0" (Linear servo motor positive direction and linear encoder increasing
direction). If the positive direction of the linear servo motor does not match the increasing direction of the linear encoder,
set [Pr. PC27.0] to "1" (Linear servo motor positive direction and linear encoder decreasing direction).
Servo parameter
Description
PC27.0
Encoder pulse count polarity selection
0: Linear servo motor positive direction and linear encoder increasing direction
1: Linear servo motor positive direction and linear encoder decreasing direction
Initial value: 0 (Linear servo motor positive direction and linear encoder increasing direction)
Setting value of [Pr. PA14]
Travel direction of linear servo motor
Address increasing command
Address decreasing command
0
Positive direction
Negative direction
1
Negative direction
Positive direction
Negative direction
Negative direction
Secondary side
Positive direction
Secondary side
Table
Positive direction
Primary side
Secondary side
Positive direction
Primary side
Primary side
Negative direction
LM-H3/LM-F series
LM-U2 series
LM-K2 series
