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5.15 Electronic Gear Settings
5.15.2 Electronic Gear Ratio Setting Examples
5
Ba
s
ic Function
s
That Requir
e
S
etting befor
e Operation
5-47
5.15.2
Electronic Gear Ratio Setting Examples
Setting examples are provided in this section.
•
Rotary Servomotors
•
Linear Servomotors
A setting example for a Serial Converter Unit resolution of 256 is given below.
Step
Description
Machine Configuration
Ball Screw
Rotary Table
Belt and Pulley
1
Machine
Specifications
•
Ball screw lead: 6 mm
•
Gear ratio: 1/1
•
Rotational angle per rev-
olution: 360
°
•
Gear ratio: 1/100
•
Pulley dia.: 100 mm
(Pulley circumference:
314 mm)
•
Gear ratio: 1/50
2
Encoder Resolution
16,777,216 (24 bits)
16,777,216 (24 bits)
16,777,216 (24 bits)
3
Reference Unit
0.001 mm (1
μ
m)
0.01
°
0.005 mm (5
μ
m)
4
Travel Distance per
Load Shaft Revolution
(Reference Units)
6 mm/0.001 mm =
6,000
360
°
/0.01
°
= 36,000
314 mm/0.005 mm =
62,800
5
Electronic Gear Ratio
6
Parameters
Pn20E: 16,777,216
Pn20E: 167,772,160
Pn20E: 838,860,800
Pn210: 6,000
Pn210: 3,600
Pn210: 62,800
Step
Description
Machine Configuration
1
Linear encoder pitch
0.02 mm (20
μ
m)
2
Reference Unit
0.001 mm (1
μ
m)
3
Electronic Gear Ratio
4
Setting Parameters
Pn20E: 256
Pn210: 20
Reference unit: 0.001 mm
Load
s
haft
Encoder:
24 bit
s
Ball
s
crew lead:
6 mm
Reference unit: 0.01°
Load
s
haft
Encoder: 24 bit
s
Gear ratio:
1/100
Reference unit: 0.005 mm
Load
s
haft
Gear ratio:
1/50
Pulley dia.:
100 mm
Encoder: 24 bit
s
16,777,216
6,000
1
1
=
×
B
A
B
A
16,777,216
3
6,000
100
1
=
×
B
A
16,777,216
62,800
50
1
=
×
Reference unit:
0.02 mm (20
m)
Forward direction
A
20 (
μ
m)
B
1 (
μ
m)
=
× 256