Setting The Electronic Gear - YASKAWA SGLFW User Manual

9.8.2 Setting the Electronic Gear

(1) Scale Feedback Resolution
The scale feedback resolution from the SERVOPACK is 1/256 of the scale pitch (Pn280).
Scale Pitch
40 µm
20 µm
4 µm
(2) Electronic Gear
The electronic gear enables the workpiece travel distance per input reference pulse from the host controller to be
set to any value. One reference pulse from the host controller, i.e., the minimum position data unit, is called a ref-
erence unit.
When the Electronic Gear
is Not Used
To move a workpiece 10 mm (0.39 in.)
The scale pitch is 20 mm. Therefore,
10 1000 20 256=128000 pulses
128000 pulses are input as reference
pulses.
The equation must be calculated at
the host controller.
Pulse Resolution
0.156 µm
0.078 µm
0.016 µm
Linear scale
9.8 Operating Using Position Control
When the Electronic Gear
is Used
Linear scale
Reference unit 1µm
To move a workpiece 10 mm using reference units
1 reference unit is 1 µm.
To move a workpiece 10 mm (10000 µm),
1 pulse = 1 µ m,
10000/1=10000 pulses.
Input 10000 pulses as reference input.
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