1 PRODUCT OUTLINE

1.1.2 Purpose and applications of positioning control

MELSEC-Q

"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)

Gear and ball screw

 

 

320mm

160mm

15m/min

Y axis

Y axis X axis

(2000r/min)

 

 

 

 

 

 

 

 

 

servomotor

 

Y axis

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Press

15m/min

 

 

 

 

punching

(1875r/min)

 

 

 

 

12 s

 

Press head

 

X axis

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Gear and rack & pinion

 

Servo

 

X axis

 

PLC

 

 

servomotor

 

 

 

 

MELSEC-Q QD75

amplifier

 

 

 

Servo

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

amplifier

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X axis

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Y axis

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

Conveyor control

Conveyor

Servomotor (with brakes)

 

 

G

 

 

 

Position detector

 

 

 

 

 

 

 

Servo amplifier

Reduction

 

 

 

Palletizer

gears

 

 

 

 

 

Ball screw

 

 

 

Unloader control

 

 

(From QD75)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PLC

 

 

 

 

 

 

 

 

Teaching unit

 

 

 

 

 

MELSEC-Q

 

AD75TU

 

 

 

 

 

 

 

 

QD75

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AD75

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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)

Servomotor

 

 

 

 

 

 

 

Coupling

Reduction

 

 

 

 

 

 

 

 

 

 

gears

 

 

 

 

 

 

 

 

 

 

ATC tool

 

 

 

 

 

 

 

 

 

 

magazine

 

 

Servo

 

 

 

 

 

 

 

amplifier

 

 

 

Positioning

 

 

 

 

 

 

 

 

 

 

Tool

 

 

QD75

 

 

 

pin

 

 

 

 

 

 

(12 pcs., 20 pcs.)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Rotation direction

Rotation direction

 

 

 

 

 

 

 

PLC

for calling

 

for calling

 

 

 

 

 

 

 

11, 12, 1, 2 or 3

17 to 20, 1 to 5

 

 

 

 

 

 

 

MELSEC-Q

Current

Current

 

 

 

 

 

 

 

 

 

 

 

 

value

 

value

 

 

 

 

 

 

 

 

retrieval

retrieval

 

 

 

 

 

 

 

 

position

position

 

 

 

 

 

 

 

 

Rotation direction

Rotation direction

 

 

 

 

 

 

 

 

for calling 5, 6, 7, 8, 9 or 10

for calling 7 to 16

 

 

 

 

 

 

 

 

<No. of tools: 12>

<No. 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.

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Mitsubishi Electronics QD75D, QD75P user manual Purpose and applications of positioning control, Palletizer