Yaskawa Junma Series SERVOPACK - Manual (Page 50)

5.4 Electronic Gear
E-49
English
„ Electronic Gear Ratio Setting Examples
The following examples show electronic gear ratio settings for different load configurations.
Step Operation
Load Configuration
Ball Screw Disc Table Belt and Pulley
1 Check machine
specifications. • Ball screw pitch:
6 mm
• Gear ratio: 1/1
Rotation angle per
revolution: 360
°
Gear ratio: 1/10
Pulley diameter: 100 mm
(pulley circumference:
314 mm)
• Gear ratio: 1/50
2 Check the
encoder resolu-
tion. 65536 (16-bit) 65536 (16-bit) 65536 (16-bit)
3 Determine the
reference unit
used. Reference unit: 0.001
mm (1
μm)
Reference unit: 0.01 ° Reference unit: 0.005
mm (5
μm)
4 Calculate the
travel distance
per load shaft
revolution.
(Reference unit) 6 mm/0.001 mm=6000 360 °/0.01°=36000 314 mm/0.005 mm
=62800
5 Calculate the
electronic gear
ratio.
6 Set parameters. Pn20E: 65536 Pn20E: 655360 Pn20E: 3276800
Pn210: 6000 Pn210: 36000 Pn210: 62800
Ball screw
pitch: 6 mm 16-bit encoder
Load shaft
Reference unit: 0.001 mm
16-bit encoder
Load shaft
Reference unit: 0.01 °
Gear ratio:
1/10
Load shaft
Gear ratio
1/50
Reference unit: 0.005 mm
Pulley diameter:
100 mm
16-bit encoder
65536
6000
1
1
=
B
A
×
B
A
65536
36000
10
1
=
×
B
A
65536
62800
50
1
=
×