Yaskawa SGDH Linear Sigma Series - Manual (Page 295)

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 μm)
2 Determine the reference
unit. 1 reference unit: 0.001 mm (1 μm)
3 Calculate the electronic
gear ratio.
4 Set parameters. Pn202 256
Pn203 20
A 20( μm)
B 1( μm)
= × 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
Δ
Δ
Δ
A Ps
L
mm/P Reference unit
Ps
Δ Δ
× ( ) = 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