SiplaceX4_en - 第490页

1 - 22 S tudent Guide SIPLACE X 10 Modular conveyor Edition 09/2005 22 Fig. 10.2 - 12 Focu ssing the laser beam Please Note: When you move the paper , the beam must follow along the edge of the PCB as accurately as po s-…

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Student Guide SIPLACE X

Edition 09/2005 10 Modular conveyor

10.2.6 Setting and checking the laser light barrier for the stopper position

Danger:

Laser beams of laser class 2 occur at the laser light barrier transmitters, so no additional protective

measures are required.

You should never look into the laser beam, however.

Do the adjustment of the LASER Diode Beam direction only from the rear side of the LASER (left

machine side). Keep right side machine covers closed!

The laser beam deflection has greatest effect at the maximum conveyor width, it should always

be calibrated at the maximum conveyor width.

Please Note:

Check or reteach the PCB reference corner after adjustment of the laser light barrier!

Fig. 10.2 - 11 Laser light barrier

Procedure:

➠ Set the maximum conveyor width.

➠ Choose General functions --> Cycle mode --> Safety mode switch on.

➠ Activate the relevant laser diode using the input/output functions in SITEST.

➠ Check the course of the laser beam. You can make the laser beam visible using a light-colored

PCB or a white sheet of paper (see Fig. 10.2 - 12).

➠ If necessary, use the adjusting screws to set the laser beam to the center of the receiver.

➠ Check the PCB reference corner and reteach, if necessary.

Laser diode

Laser receiver

Adjusting screws

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Student Guide SIPLACE X

10 Modular conveyor Edition 09/2005

Fig. 10.2 - 12 Focussing the laser beam

Please Note:

When you move the paper, the beam must follow along the edge of the PCB as accurately as pos-

sible, with minimal deflection to the left and right.

10.2.7 Setting the light barrier in the placement area

Function: 10

– Switching on the laser light barrier

– Starting the PCB braking, see Fig. 10.2 - 13.

The light barrier in the placement area can be mounted in three different positions. The light barrier

is fitted in the direction to the input conveyer. The light barrier then trigger the LASER stopper and

slow down the PCB movement. The

slow PCB approach is teached automatically via soft-

ware.The travel profile for braking the PCB (see Fig. 10.2 - 13) is started in good time to allow the

PCB to be stopped reliably at the laser light barrier after no more than 100 ms.

Paper

PCB with the laser

beam parallel to it

Visible

laser beam

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Student Guide SIPLACE X

Edition 09/2005 10 Modular conveyor

Fig. 10.2 - 13 Diagrams PCB braking

Due to the automatical teaching of the Slow PCB approach the time to reach the stopper position

is constant irrespective of the PCB weight. The transport time keeps constant.

10.2.8 Setting the light barrier in the input,- intermediate- and output conveyer

Function: 10

– Recognizing and stopping the PCB boards.

– PCB monitoring in the input conveyer, that means

Is a PCB recognized in the input conveyer and this PCB appears on the station GUI, then the

machine closes the interface to the previous station. With PCB boards with outbreaks it can

happen that the PCB, is stoped, however, the signal of the light barrier goes out and the inter-

face to the previous station is opened again. Then the next PCB would move into the input con-

veyer with the PCB still lying in the input conveyer. With PCB monitoring the PCB is moved

backwards and once again forwards, untill the light barrier switches.

Direction of PCB transport

Time (t)

< 100 ms

Light barrier

Laser

Travel profile

braking process

Start End

Placement areaInput belt

2nd board

Time (t)

Speed (v)

150 ms

Laser

Travel profile

braking process

Start End

Input belt

1st board

Speed (v)

Placement area

Light barrier