Mitsubishi MELSEC-F, Training Manual

Page: 36 / 74

Positioning Control Components of Positioning Control and Their Roles 3
3-10
2) Examples of calculation equations
a) Movement quantity per rotation of motor (mm/rev)
b) Number of rotations of motor (rev/min.)
(The maximum number of rotations is realized during quick feed.)
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)
b) Command pulse frequency during quick feed (pulse/s)
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.
Movement
quantity per
rotation of motor
Lead of ball screw (mm/rev) Speed reduction ratio =
×
Number of
rotations of
motor
Moving part speed during quick feed (mm/min)
Movement quantity per rotation of motor
Rated number of
rotations of
servo motor
=
<
=
Movement
quantity
per pulse
Movement quantity per rotation of motor (mm/rev)
Feedback pulse number (pulse/rev)
Electronic
gear ratio
=
×
60
Command
pulse
frequency
during
quick feed
Number of rotations of motor
during quick feed (r/min)
Movement quantity per pulse
(mm/pulse)
=
Movement quantity per
rotation of motor (mm/rev)
×
×