Examples Of Ac Servo Systems - Mitsubishi Electric MELSEC iQ-F Series User Manual

FX Series Programmable Controllers
Introduction to FX Positioning Control Systems
2.2

Examples of AC servo systems

Positioning indicates the operation to move an object, such as a workpiece or tool (drill or cutter), from one
point to another point and to stop it with efficiency and precision.
In other words, the principle of positioning is the control of speed in accordance with the position, performed
to promptly eliminate the remaining distance to the target position. The flexibility to change the target position
electrically and easily is an important requirement.
Several cases of positioning using an AC servo motor are systematically shown below.
Type of machine
Constant feed
Tapping
Drilling in steel
sheet
Index table
Description
In the press/shear process for
cutting, punching, etc.,
processed material is positioned
with high precision to produce a
constant sized product.
In order to tap a workpiece, "1. Quick
feed", "2. Cutting feed" and "3. Quick
return" are performed repeatedly.
In order to perform processing on a
flat face, positioning with
precision is performed by two motors
(X axis feed motor and Y axis feed
motor).
The position of the circular table is
indexed. The index position is set on
the outside (digital switch) or the
inside (program). Shortcut drive is
performed depending on the index
position.
Schematic drawing
Press main unit
the
Roll feeder
Uncoiler
M
Slide
Timing
belt
M
Feed
Pulley
motor
Drilling
X axis
Workpiece
high
X-Y table
M
X axis feed motor
Worm
wheel
2 Positioning by AC Servo System
2.2 Examples of AC servo systems
Servo motor
Workpiece
Drill
Ball
Quick Cutting
screw
feed feed
Quick
return
Drill unit
Y axis
M
Y axis feed motor
Index table
Servo
motor
1
2
3
4
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