Yaskawa MP940 - Manual (Page 434)

Motion Control
11.3.1 Prerequisites for Position Control
11-32
Electronic Gear Parameter Setting Example (A): With Ball Screw
In the above machine system, if the requirement is reference unit = output unit = 0.001 mm,
the setting of each parameter will be as follows:
•
• Gear ratio = n/m = 5/7
• No.21 =
7
• No.22 = 5
Servo Fixed
Parameter No.
Name Description
Initial
Value
No. 21 Servomotor Gear
Ratio • These parameters are used to set the gear ratio between the motor
and the load. When the motor axis has rotated m times and the
mechanical configuration allows the load axis to rotate n times, set
the following values:
• Setting range: 1 to 65,535 [rotations]
Setting Examples
1
No. 22 Machine Gear
Ratio 1
No.21 m
No.22 n
=
=






回転
回転
の値を設定します。
No. 21 = m rotations
No. 22 = n rotations
Motor axis
m rotations
7 rotations
3 rotations
4 rotations
9 rotations
Load axis n
rotations
減速比
したがって を設定します。
=
n
m
3
7
4
9
4
21
No.21 21
No.22 4
= × =
=
=






Gear ratio =
Therefore, set the following values:
No. 21 = 21
No. 22 = 4
m
n
Motor
7 rotations
5 rotations
Ball screw pitch P = 6 mm/rotation
No.19
6mm
0.001mm
= = 6000