Yaskawa MotionWorks+ Windows Software - Manual (Page 135)

MotionWorks+™ User Unit Conversion
129
Speed Formulas
The formula below illustrates the conversion from user units per second to percentage
of rated speed. In the example below, assume the speed setting is 100 units per second,
the rated motor speed is 3000rpm, and the feed constant is 9 units per machine
revolution.
Conversely, the following formula can be used to determine minimum and maximum
speed in user units per second.
Speed
Setting
Rated
Motor
Speed
Convert to
seconds
Feed
Constant
Gear Box Convert to
10000 =
100%
% of Rated
Speed
% of Rated
Speed
Rated
Motor
Speed
Convert to
seconds
Feed
Constant
Gear Box Convert to
10000 =
100%
Speed
Setting
100 units
1s
------------------------
3000 rev
1 min
----------------------- ÷
60 s
1 min
-------------- ×
9 units
1 rev
----------------- ÷
2 input
1 output
--------------------- ×
10000%
100
---------------------- × 11.11% =
150%
3000 rev
1 min
----------------------- ×
60 s
1 min
-------------- ÷
9 units
1 rev
----------------- ×
2 input
1 output
--------------------- ÷
10000%
100
---------------------- ÷
1350 units
1 s
--------------------------- =