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12 CONTROL SUB FUNCTIONS
QD75MH
Control
Control
unit
value
[1] Basic concept of the electronic gear
The electronic gear is an item which determines how many rotations (rotations by
how many pulses) the motor must make in order to move the machine according
to the programmed movement amount.
AP
PLS
AL AM
The basic concept of the electronic gear is represented by the following
expression.
•
Pr.2
(No. of pulses per rotation)
•
Pr.3
(Movement amount per rotation) = AL
•
Pr.4
(Unit magnification)
•
Movement amount per pulse
Electronic gear =
Set values for AP, AL and AM so that this related equation is established.
However, because values to be set for AP, AL and AM have the settable range,
values calculated (reduced) from the above related equation must be contained
in the setting range for AP, AL and AM.
PLS
Servo
M
amplifier
ENC
PLS
Feedback pulse
= AP
= AM
=
AP
AP
=
AL × AM
S
12 - 14
MELSEC-Q
Machine
Reduction retio
S
...(1)
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