YASKAWA JEPMC-MP2300-Y Series User Manual page 150

3 Module Specifications
3.4.2 Counter Functions and Settings of LIO-01/LIO-02 Modules
Load travel distance per rotation of
load axis (reference unit)
EXAMPLE
Ball screw
Load axis
One
=
rotation
Reference unit
3-42
4.
Find the load travel distance for each rotation of the load axis using the reference unit
and set this distance to the counter fixed parameter No. 18 (Moving Amount Per
Machine Rotation).
• Calculation Examples
• For a ball screw pitch of 5 mm and a reference unit of 0.001 mm:
5
------------ - = 5000 (Reference unit)
0.001
Round table
P
Load axis
P: Pitch
P
One
rotation =
Reference unit
5.
Set the Encoder Gear Ratio and the Machine Gear Ratio in the counter fixed
parameters No. 11 and No.12.
When the encoder axis has rotated m times and the mechanical configuration allows the load
axis to rotate n times, set the following values:
No. 11 (Encoder Gear Ratio) = m rotations
No. 12 (Machine Gear Ratio) = n rotations
Setting range: 1 to 65,535 [rotations]
<Setting Example>
For the configuration shown in the diagram:
Encoder axis
エンコーダ軸
m rotations
m
回転
Gear ratio = n/m = (3/7) × (4/9) = 4/21
Therefore, set the following values:
No.11 (Encoder Gear Ratio) = 4 (rotations)
No. 12 (Machine Gear Ratio) = 21 (rotations)
Load travel distance per load axis rotation reference unit
=
Belt + pulley
Load axis
D
D: Pulley diameter
360°
One
=
Reference unit
rotation
4 rotations
4回転
7 rotations
7回転
Load axis n rotations
9 rotations
9回転
3 rotations
3回転
Reference unit
πD
πD
n
負荷軸 回転