Advantech PCI-1241 Especificações descarregar pdf (Página 19)

PCI-1240U

4-axis Universal PCI Stepping/

Pulse-type Servo Motor Control

Card

PCI-1761

8-ch Relay Actuator and 8-ch

Isolated Digital Input PCI Card

Switch, Button and

Indicator

Digital Input/Output

Motion Control

Laser Marking for

Microchips

Solution Description:

The machine loads a pattern file into its memory

and calibrates the machine vision software so that

it knows where to print on the microchip, and where

to check the finished markings. Microchips are

brought to the machine in a continuous stream on

a conveyor belt.

One axis of the PCI-1240U is used to control the

speed of the conveyor belt, which can help ensure

there is coordination with other machines in the

production line. When a microchip has entered the

machine, a door closes, and the digital output of

PCI-1240U turns on a warning indicator. A sensor

detects if the door is closed properly and sends a

signal to the PCI-1761.

When the PCI-1761 receives the signal that the door

is closed, it will initialize the frame grabber card.

The frame grabber card captures an image of the

microchip, and the machine vision software analyzes

the image and determines the orientation and exact

position of the microchip. It also sets the reference

point for the X and Y axes. With the reference point

now set, the two axes of the PCI-1240U can be used

to direct the laser beam over the surface.

Digital output signals from PCI-1240U are used

to switch the laser on and off during the marking.

Circular and linear interpolation enables intricate

patterns. On completion, the laser is moved back to

its secure position.

Another image is captured of the microchip, this time

to verify that the marking has been successful. If not,

this will set off an alarm, and a copy of the image

will be stored on the system for troubleshooting.

If successful, PCI-1240U turns off the warning

indicator, and activates the 4th axis to start the

conveyor belt that brings the microchip out of the

machine.

Conclusion:

•

Fully automatic system removes the need for operators

•

Faster processing for intricate or large patterns compared to proprietary systems

•

No need to decode programs between the computer and proprietary systems

•

Reduced support costs as system can be remotely diagnosed. By using software like PC-

Anywhere or NetMeeting to check the machine over the Internet, the need to visit field sites can

often be eliminated. For this customer, it meant saving several international trips every year.

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