00195193-02 SG D4 FSE en (1) - 第288页

Modular conveyor Conveyor Settings Control of PCB clamping S tudent Guide SIPLACE D4 (FSE) Modular conveyor EN 09/2006 272 1 1.3.10 Control of PCB clamping Function description:  The PCB moves into the place ment area, …

Modular conveyor

Light Barrier Functions in Input, Intermediate and Output Conveyors Conveyor Settings

Student Guide SIPLACE D4 (FSE)

EN 09/2006 Modular conveyor

271

11.3.8 Light Barrier Functions in Input, Intermediate and Output Conveyors

 Recognizing and stopping the PCB boards.

 Monitoring the boards in the input conveyor i.e.

If a board is recognized in the input conveyor, it will appear on the operating interface and the

machine will lock the conveyor interface to the previous station. When using boards with outbreaks,

the board may stop although the signal of the light barrier is disabled and the interface to the previous

station is opened again. Then the next PCB would move into the input conveyer with the PCB still

lying in the input conveyer. The board monitoring function moves the board backwards and then

transports it forwards again, until the light barrier switches.

11.3.9 Setting the Clamping Actuator

Legend:

1. Actuator

2. Top edge of conveyor belt

X Set the distance between the actuator and the

top edge of the conveyor belt to 94 mm.

NOTE:

The distance between the clamping

actuator (lifting table) and the top

edge of the belt must be checked at all

four contact points.

Modular conveyor

Conveyor Settings Control of PCB clamping

Student Guide SIPLACE D4 (FSE)

Modular conveyor EN 09/2006

272

11.3.10 Control of PCB clamping

Function description:

 The PCB moves into the placement area, it is recognized by the light barrier, stops at the laser and

the lifting table moves up.

 Check PCB clamping: The transport motor in the placement area start again. Is the PCB clamped

correctly the motor current rise up and reach an defined threshold value. Once the board has been

correctly clamped into place, the placement process will begin.

 If this threshold is not reached, the system assumes that the board is on its way to the intermediate

or output conveyor and has therefore not been correctly clamped into place.

 The station computer will issue the message "PCB not correctly clamped PA1 (PA2)". The process

can be repeated by pressing the "start button".

 The lifting table will move downwards, the board will be transported back and the stopper position

will be approached again.

NOTE:

The check whether a PCB is clamping correctly, is controlled with a motor

current check of the transport motor if the PCB board is clamped (Lifting table

up). To check the function you could put a distance plate under the conveyor

side, so that the lifting table can not move to the upper position.

The check is not performed if the option "Vacuum Tooling" is installed.

Modular conveyor

Lifting table functions Conveyor Settings

Student Guide SIPLACE D4 (FSE)

EN 09/2006 Modular conveyor

273

11.3.11 Lifting table functions

Lifting table up function

Requirements for detecting that the lifting table is up:

 7-8 increments on the incremental encoder

 Check performed by software (see Section 11.4.10 Control of PCB clamping [J 276]).

 Dynamic response of approx. 500 ms

Lifting table down function

Requirements for detecting that the lifting table is down:

 7-8 increments on the incremental encoder

 BERO on the lifting table cylinder

 Dynamic response of approx. 480 ms

Legend:

1. Actuator

2. Lock nut damper

3. Fastening screws for mounting block

4. Damping unit

5. 3/5 way solenoid valve mounted on lifting table

drive cylinder

6. Fork-type light barriers / incremental disk