YASKAWA E-V-MD Series User Manual

7.4 Trial Operation
7-19
7
Operation
7.4.3 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:
When the Electronic Gear is Used:
Ball screw pitch: 6 mm
Workpiece
Encoder resolution (17 bit) 131072
The section indicates the difference between using and not using an electronic gear when a
workpiece is moved 10 mm in the following configuration.
A Calculate the revolutions.
1 revolution is 6 mm. Therefore, 10/6 revolutions.
B Calculate the required reference units.
131072 reference units is 1 revolution. Therefore, 10/6 × 131072 = 218453.33 reference
units.
C Input 218453 references as reference units.
Reference units must be calculated per reference. → complicated
The reference unit is 1 μm. Therefore, to move the workpiece 10 mm (10000 μm),
1 reference unit = 1 μm, so 10000 1 = 10000 reference units.
Input 10000 pulses as reference units.
÷
Calculation of reference units per reference is not required. → simplified

YASKAWA E-V-MD Series Specifications

General

Brand	YASKAWA
Model	E-V-MD Series
Category	Servo Drives
Language	English