SiplaceX4_en - 第102页

1 - 26 S tudent Guide SIPLACE X 3 Communication and Control Edition 09/2005 26 3.3.1 1.1 Communication during a image acquis ition The main communication b etween the vision system and machinecontroller is the transmissi…

1 - 25

Student Guide SIPLACE X

Edition 09/2005 3 Communication and Control

3.3.11 Communication Siplace Vision

The communication between the computers is carried out via LAN cables. The MC send the com-

mands for the image acquisition to the Visionrechner and receives the result of the measuring.

The MC send the illumination values of the corresponding GF.

The taken pictures are sent digital via the Hot link card to the Visionrechner, these evaluated the

picture.The result is sent to the MC.

Fig. 3.3 - 20 Overview Siplace Vision

Computer Unit

PCB-Camera

FC-Camera

IC-Camera

Component

Camera

Machine controller

(MC)

Sationcomputer with

Visionsoftware

LAN

Hotlink-Board

CAN Bus

Vision Board

PCB-Camera

Illumination

Comp.Camera

Illumination

FC-Camera

Illumination

IC-Camera

Illumination

Backplane

COM-Board

1 - 26

Student Guide SIPLACE X

3 Communication and Control Edition 09/2005

3.3.11.1 Communication during a image acquisition

The main communication between the vision system and machinecontroller is the transmission of

illumination values. These values, stored in the GF, are sent via CAN bus to the camera in ques-

tion. As soon as the camera should take the picture, the camera illumination is activated by a trig-

ger. From this moment on the row of LEDs which provide the different illumination levels light

dependant on the illumination value 0-255. This illumination value can have 0 = dark up to 255 =

bright. All illumination levels start lighting at the same moment. The value 0-255 determines the

length of the illumination time.

The maximum length of illumination is limited to 6 ms.

Fig. 3.3 - 21 Time sequence from up to down for the Communication Image acquisition

Cameras

Illumination

Controller

Machine controller

(MC)

Stationcomputer with

Visionsoftware

Prepare

CAN Bus

Illumination

(ca. 6ms)

PCB-Camera

FC-Camera

IC-Camera

Component

Camera

Start Image acquisition

(Illumination values)

Prepare Flash

(illumination)

Hardware Signal

(Trigger)

Visionboard(LP,BE)

Vision Control unit ,

(IC,FC)

Ready message

to the MC

Signal "Ready for

Image aquisition"

CAN Bus

Image

interpretation

Image

acquisition

Ready message

to the VISION SW

Result

"Image interpretation"

1 - 27

Student Guide SIPLACE X

Edition 09/2005 3 Communication and Control

3.3.12 Communikation C&P 20 Head

The TQM –moduel on the head interface C500 is communicate via the CAN Bus (1M/Baud) to the

Machine controller.

The communication from the head interface to the C&P20 head is carried out with an additional

CAN Bus. Which sed the data with 125KBaud. (in Future 500kBaud)

The 20 DP - axes are controled via the „DP- Master" on the motherboard. So the machine CAN

Bus send 4 commands:

– Start the DP axis after Pick up/Placement (Pick up angle/Placement angle)

– Start the DP axis after Vision (Correction angle)

– Wait DP axis before Vision (Position commando not allowed)

– Wait DP axis before Pick up/Placement (Position commando not allowed)

Fig. 3.3 - 22 CAN-Bus controlled head function on the C&P 20 head

Computer Unit

Head processor

C500

COM Board

Vacuum/air kiss

generator

Machine- CAN Bus

(1MBaud)

Head- CAN Bus

(125KBaud/

500KBaud)

DP Master

Motherboard

C&P 20 Head

DP - drive 20

DP - drive 1

DP - drive 2

DP - drive 3

Intermediate

distributor