Yaskawa Σ-V Series AC Servo Drives Rotational Motor MECHATROLINK-III - Manual (Page 85)

4 Operation
4.4.3 Electronic Gear
4-20
4.4.3 Electronic Gear
The electronic gear enables the workpiece travel distance per reference unit input from the host controller. The
minimum unit of the position data moving a load is called a reference unit.
When the Electronic Gear is Not Used:
Calculate the revolutions.
1 revolution is 6 mm. Therefore, 10/6 revolutions.
When the Electronic Gear is Used:
Ball screw pitch: 6 mm
Workpiece
Encoder resolution (17 bit) 131072
1
2
3
The section indicates the difference between using and not using an electronic gear when a
workpiece is moved 10 mm in the following configuration.
Calculate the required reference units.
131072 reference units is 1 revolution. Therefore, 10/6
× 131072 = 218453.33 reference units.
Input 218453 references as reference units.
Reference units must be calculated per reference. → complicated
The reference unit is 1 μ m. Therefore, to move the workpiece 10 mm (10000 μ m),
1 reference unit = 1 μ m, so 10000 1 = 10000 reference units.
Input 10000 pulses as reference units.
÷
Calculation of reference units per reference is not required. → simplified