Mitsubishi Electric MELSEC Q Series, User Manual

Page: 37 / 834

1 - 5
Chapter 1 Product Outline
1.1.2 Purpose and applications of positioning control
"Positioning" refers to moving a moving body, such as a workpiece or tool (hereinafter,
generically called "workpiece") at a designated speed, and accurately stopping it at the
target position. The main application examples are shown below.
Punch press (X, Y feed positioning
)
Y axis
servomotor
X axis
servomotor
Y axis X axis
Y axis
Y axis
X axis
QD77GF
Press head
Servo
amplifier
Servo
amplifier
Press
punching
Gear and ball screw
X axis
Gear and rack & pinion

To punch insulation material or leather, etc.,
as the same shape at a high yield, positioning
is carried out with the X axis and Y axis
servos.

After positioning the table with the X axis
servo, the press head is positioned with the Y
axis servo, and is then punched with the
press.

When the material type or shape changes, the
press head die is changed, and the positioning
pattern is changed.
Palletizer
Servomotor
(with a brake)
Conveyor control
Conveyor
Servo
amplifier
QD77GF
Ball screw
Reduction
gear
G
Palletizer
Position detector
Unloader control

Using the servo for one axis, the palletizer is
positioned at a high accuracy.

The amount to lower the palletizer according to
the material thickness is saved.
Compact machining center (ATC magazine positioning)
1
7
4 10
11
12 2
3
8 6
9 5
1
11
6 16
3
4
5
2 20
19
18
17
10 12
9
13
8 14
7 15
Servo
amplifier
QD77GF
Servomotor
Coupling Reduction
gear
ATC tool
magazine
Positioning
pin
Tool
(12 pcs., 20 pcs.)
Rotation direction
for calling
11, 12, 1, 2 or 3
Rotation direction
for calling
17 to 20, 1 to 5
Current
value
retrieval
position
Current
value
retrieval
position
Rotation direction
for calling 5, 6, 7, 8, 9 or 10
Rotation direction
for calling 7 to 16
<Number of tools: 12> <Number of tools: 20>

The ATC tool magazine for a compact
machining center is positioned.

The relation of the magazine's current value
and target value is calculated, and positioning
is carried out with forward run or reverse run to
achieve the shortest access time.