Yaskawa MotionWorks+ Windows Software - Manual (Page 134)

User Unit Conversion MotionWorks+™
128
Position Formulas
The formula below shows the conversion from user units to encoder counts. In the
example, assume the position setting is 100 units, the motor encoder resolution is 8192
quadrature counts, and the feed constant is 9 units per machine revolution. The gear box
is 2:1.
Conversely, the following formula can be used to determine the maximum absolute
position for any one move.
Position
Setting
Encoder
Resolution
Feed
Constant
Gear Box Encoder Counts
Encoder
Counts
Encoder
Resolution
Feed
Constant
Gear Box Position
Setting
100 units
8192 counts
1 rev
-------------------------------- ×
9 units
1 rev
----------------- ÷
2 input
1 output
--------------------- × 182044 counts =
2147438647 counts
8192 counts
1 rev
-------------------------------- ÷
9 units
1 rev
----------------- ×
9 input
1 output
--------------------- ÷
4718493.12085 units
=