Yaskawa Sigma-5 Large Capacity Users Manual: Design and Maintenance-Rotary Motors-Analog Voltage and Pulse Train Reference - Manual (Page 161)

5 Operation
5.4.4 Electronic Gear
5-40
5.4.4 Electronic Gear
The electronic gear enables the workpiece travel distance per reference pulse input from the host controller.
The minimum unit of the position data moving a load is called a reference unit.
Note: If the multiplier of the input reference pulse is switched, the input reference pulse from the host controller will be
multiplied by n and defined as the reference unit of the position data. ("n" is the multiplier of the reference pulse.)
When the Electronic Gear is Not Used:
Calculate the revolutions.
1 revolution is 6 mm. Therefore, 10 ÷ 6 = 10/6 revolutions.
When the Electronic Gear is Used:
Ball screw pitch: 6 mm
Workpiece
Encoder resolution (20 bit) 1048576
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 pulses.
1048576 pulses is 1 revolution. Therefore, 10/6
× 1048576 = 1747626.66 pulses.
Input 1747627 pulses as reference pulses.
Reference pulses must be calculated per reference. → complicated
The reference unit is 1 μm. Therefore, to move the workpiece 10 mm (10000 μm),
1 pulse = 1 μm, so 10000 1 = 10000 pulses.
Input 10000 pulses.
÷
Calculation of reference pulses per reference is not required. → simplified
Rotation