Yaskawa MP930 - Manual (Page 226)

Controlled Axis Support Functions
6.1.2 Electronic Gear
6 -4
The following parameters are related to the electronic gear.
Parameter
No.
Name Description Default
18 No. of digits left of
radix point Minimum reference units are determined by this parameter and Reference Unit
Selection for the servo controller function selection flags (b0 to b3).
Parameter set values are described below. 3
19 Machine rotation/ref-
erence unit Sets the amount a load moves (reference units) per load axis rotation.
Setting range: 1 to 2 31 −1
10000
Ball screw
Ball screw pitch = 10 mm
10
Ball screw pitch = 10 mm,
Reference Unit Selection = mm,
number of digits left of radix point = 3
↓
Set the amount of movement per one machine
rotation to 10,000.
Rotating table
One rotation = 360°
One table rotation = 360°,
Reference Unit Selection = deg, number of digits
left of radix point = 3
↓
Set the amount of movement per one machine
rotation to 360,000.
πD
D
Belt Roller 1 rotation = 360°,
Reference unit selection = mm, number of digits
left of radix point = 3
↓
Set the amount of movement per one machine
rotation to πD ¢ 1,000.
20 Gear ratio, Servomo-
tor end These parameters are used to set the gear ratio for the Servomotor and load. Set the
following at values that will allow the load shaft to rotate n times when the Servo-
motor shaft rotates m times.
S Gear ratio (Servomotor end) = m
S Gear Ratio (Load end) = n
1
6