Mitsubishi MELSEC-F Training Manual page 36

Positioning Control
2) Examples of calculation equations
a) Movement quantity per rotation of motor (mm/rev)
Movement
quantity per
rotation of motor
b) Number of rotations of motor (rev/min.)
(The maximum number of rotations is realized during quick feed.)
Number of
rotations of
motor
Note:The number of rotations of a motor during quick feed should not exceed the rated
number of rotations.
The moving part speed during quick feed should not exceed the parameter "speed limiting
value" of the positioning controller.
a) Movement quantity per pulse (mm/pulse)
Movement
quantity
per pulse
b) Command pulse frequency during quick feed (pulse/s)
Command
pulse
frequency
during
quick feed
Note:The command pulse frequency during quick feed should not exceed the maximum input
pulse frequency of the servo amplifier.
a) Maximum movement distance
In each of the absolute and incremental methods, the entire movement distance should
not exceed the maximum pulse number of the positioning controller.
= Lead of ball screw (mm/rev)
Moving part speed during quick feed (mm/min)
=
Movement quantity per rotation of motor
Movement quantity per rotation of motor (mm/rev)
=
Feedback pulse number (pulse/rev)
Number of rotations of motor
during quick feed (r/min)
=
60
Components of Positioning Control and Their Roles 3
×
Speed reduction ratio
Movement quantity per
×
rotation of motor (mm/rev)
Movement quantity per pulse
×
(mm/pulse)
Rated number of
< =
rotations of
servo motor
Electronic
×
gear ratio
3-10