YASKAWA JEPMC-MP2300-Y Series User Manual page 350

6 Motion Parameters
6.5.2 Electronic Gear
( 1 ) Parameter Setting Example Using Ball Screw
( 2 ) Parameter Setting Example Using Rotating Table
6-60
• Machine specifications: Ball screw axis rotates 5 times for each 7 rotations of the motor axis
(Refer to the following figure.)
• Reference unit: 0.001 mm
Motor
To move the workpiece 0.001 mm for 1 reference unit input under the conditions outlined above, i.e.,
for 1 reference unit = 1 output unit, make the following settings for fixed parameters 6, 8, and 9.
• Fixed Parameter 6: Travel distance per machine rotation = 6 mm/0.001 mm = 6000 (reference
units)
• Fixed Parameter 8: Gear ratio at Servomotor = m = 7
• Fixed Parameter 9: Gear ratio at load = n = 5
Set the SERVOPACK gear ratio to 1:1.
• Machine specifications: Rotating table axis rotates 10 times for each 30 rotations of the motor axis
(Refer to the following figure.)
• Reference unit: 0.1°
To rotate the table 0.1° for 1 reference unit input under the conditions outlined above, i.e., for 1 refer-
ence unit = 1 output unit, make the following settings for fixed parameters 6, 8, and 9.
• Fixed Parameter 6: Travel distance per machine rotation = 360°/0.1° = 3600 (reference units)
• Fixed Parameter 8: Gear ratio at Servomotor = m = 30
• Fixed Parameter 9: Gear ratio at load = n = 10
The gear ratio for fixed parameters 8 and 9 (m/n) may be constant, e.g., m = 3 and n = 1.
Set the SERVOPACK gear ratio to 1:1.
m = 7 rotations
Workpiece
P (pitch) = 6
n = 5
Workpiece (Rotating table)
360°/rotation
n = 10 rotations
m = 30 rotations
Motor
Ball