YASKAWA SGLFW, User Manual

Page: 318 / 447

9.8 Operating Using Position Control
9-51
9
(5) Electronic Gear Ratio Setting Example
An example of electronic gear ratio setting is given below.
(6) Electronic Gear Ratio Equation
Step Operation Load Configuration
1 Check the scale pitch.
0.02 mm (20
µ
m)
2 Determine the reference
unit. 1 reference unit: 0.001 mm (1
µ
m)
3 Calculate the electronic
gear ratio.
4 Set parameters. Pn202 256
Pn203 20
A 20(
µ
m)
B
1(
µ
m)
=
×
256
A
B
+
−
×
256
Movement distance L mm
Ps
L
L mm Movement distance
Posi-
tion
loop
Speed
loop
Reference pulse
mm/P
L
Ps
×
L
B
∆
∆
∆
A
Ps
L
mm/P Reference unit
Ps
∆ ∆
× ( ) = 256 ×
B
A
( ) =
=
256
×
L
×
256
× Set A and B with the following parameters.
A Pn202 B Pn203
Ps mm Scale pitch
mm/scale pitch
Linear servomotor