User Constant Settings and Functions
5.2.5 Using the Electronic Gear Function
5 -30
Circular Tables
Incremental encoder:
13-bit
Load shaft
Travel distance per load shaft revolution
=
360
0.1
Electonic gear ratio B
A
=
2048
×
4
×
3
3600
×
1
=
Pn202
Pn203
rence unit: 0.1
_
Deceleration
ratio: 3:1
Preset Val-
ues
Pn202
24576
ues
Pn203
3600
Belts and Pulleys
Load shaft
Travel distance per load shaft revolution
=
3.14
×
100 mm
0.02 mm
=
15700
Electronic gear ratio B
A
=
16384
×
4
×
2
15700
×
1
=
Pn202
Pn203
Deceleration
ratio: 2:1
Reference unit: 0.02 mm (0.0008 in)
Pulley diameter:
f
100mm
Set a PG dividing ratio equivalent
to 16 bit for the absolute encoder.
=
131072
15700
=
32768
3925
Preset Val-
ues
Pn202
32768
ues
Pn203
3925
J
J
Control Block Diagram
The following diagram illustrates a control block for position control.
Differentiation
Smoothing
X1
X2
X4
Error
counter
Kp
Feed-
forward gain
Primary
lag filter
Bias
Speed
loop
Current
loop
M
Frequency
dividing
Pn201
Pn204
Pn202
Pn203
+
--
Pn102
Pn203
Pn202 Pn10A
Pn107
Pn109
Servomotor
PG
Pn200.0
Reference
pulse
PG signal
output
Servopack (position control)
Encoder
Bias addition
range
Pn108
B
A
B
A
+
+ +
5
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