Mitsubishi Electric MELSERVO-J3W Series Instruction Manual page 265

13. USING A LINEAR SERVO MOTOR
3) If the parameter No.PC27 is set to "
with the increase direction of linear encoder, the motor speed will be a positive value by making the
linear servo motor work to the positive direction. If the positive direction of linear servo motor does
not match with the increase direction of linear encoder, the motor speed will be a negative value. If
the parameter No.PC27 is set to "
with the increase direction of linear encoder, the motor speed will be a negative value by making the
linear servo motor work to the positive direction.
(4) Setting of the linear encoder resolution
Set the ratio to the linear encoder resolution using the parameter No.PS02 (Linear encoder resolution
setting numerator) and parameter No.PS03 (Linear encoder resolution setting denominator).
(a) Parameter setting
Set the value as the following equation.
Parameter No.PS02 (Linear encoder resolution setting numerator)
Parameter No.PS03 (Linear encoder resolution setting denominator)
(b) Parameter setting example
When the linear encoder resolution is 0.5 m
Parameter No.PS02
Parameter No.PS03
The following shows the simplified chart for the setting value of parameter Nos.PS02 and PS03.
Setting Parameter No.PS02
value
Parameter No PS03
POINT
When using this parameter, turn the power off once after setting the parameter
No.PA19 to " D", and then turn it on again.
Turn off the power and then on again after setting the parameter to validate the
parameter value.
Linear encoder resolution
0.01 0.02
1
100
POINT
When setting the wrong value to the parameter Nos. PS02 and PS03, they may not
operate properly.
Servo alarm (27. and 42. ) may occur at positioning operation or magnetic pole
detection.
0" and the positive direction of linear servo motor matches
1" and the positive direction of linear servo motor matches
1
0.5 m
2
Linear encoder resolution ( m)
0.05 0.1
1 1 1
50 20 10
13 - 16
Linear encoder resolution [ m]
0.2 0.5 1.0
1 1 1
5 2 1
2.0
2
1