00196044-05 - sg x und x4i fse_en.pdf - 第274页

C&P20A Pickup and Placement Cycle for C&P20A Standard Mode - Placement: Z Axis Up S tudent Guide (FSE) SI PL ACE X Series and X4I C&P20A Edition 01/2009 EN 274 7.4.26 St andard Mode - Placement: Z Axis Up 7.4…

C&P20A

Detailed Standard Pickup Procedure: Z Axis Up Pickup and Placement Cycle for C&P20A

Student Guide (FSE) SIPLACE X Series and X4I

Edition 01/2009 EN C&P20A

273

7.4.24 Detailed Standard Pickup Procedure: Z Axis Up

7.4.25 Standard Mode - Placement: Z Axis Down

Axis controller:

 Enable signal for "light barrier down" function

LB down switches:

 End signal Z axis positioning downwards;

 Digital pressure control valve: switches "Air blast ON"

 Pickup/placement position; air blast threshold "place component"reached? Yes.

7-38: Detailed pickup procedure: Z Axis Up

LB down switches:

 Vacuum Threshold comp. picked reached?

YES

Z axis starts:

 Z axis starts positioning upwards

Component sensor switches due to Z axis

movement:

 Z axis position value; nozzle length +

comp.height measurement threshold

reached? YES

Z axis position in safety area:

 reset light barrier state,

 X, Y gantry axes start

 start component feeder (communication to

feeder table)

Vacuum query:

 Vacuum threshold for holding circuit reached?

YES

 Star axis starts.

7-39: Detailed component placement procedure: Z Axis Down

In this mode (light barrier down) the placement

force at the C&P20A head is around 2N.

End position signal for X and Y axes--> Z axis

starts:

 Positioning of Z axis downwards

 Component sensor checks nozzle length with

component. Z axis measurement value -

nozzle length "with component" - threshold

reached? YES

End position signal for star axis:

 Performs vacuum test "before placement".

"Vacuum closed" threshold reached? YES to

determine whether the component is held by

holding force on the nozzle.

C&P20A

Pickup and Placement Cycle for C&P20A Standard Mode - Placement: Z Axis Up

Student Guide (FSE) SIPLACE X Series and X4I

C&P20A Edition 01/2009 EN

274

7.4.26 Standard Mode - Placement: Z Axis Up

7.4.27 Optical Nozzle Query

 After the reference run, the gantries move into the wait position and performs the first nozzle

scanning. During the production, a nozzle scanning run is performed after 350 head cycles (can be

set by Siemens service if required) and after the completion of the board currently processed. This

ensures that the nozzle quality is continually checked during the production process:

– All nozzles listed in the scan parameters of the station database will be measured by the

component camera.

– If there is any deviation from the defined size, shape or brightness, the machine will show the

message:

Nozzle worn down or contaminated

 Tiny nozzles may touch the solder paste or the glue because of component shift and the minimum

component height.

 The number of components per segment (number of head cycles), after the next nozzle query has

been performed, should be adjusted to the customer's process requirements. This check is always

performed after completing PCB processing.

7.4.28 Air Blast Control During Placement

The air blast is controlled by the digital pressure control valve, which can be programmed via the

component shape data in the SIPLACE PRO computer. In the component shape data, values between

0 and 255 bar can be set at "Advanced Handling". The standard value which is transmitted with the

component shape to the station is 150 mbar. This value needs to be reached to 80 % during placement.

7-40: Detailed component placement procedure: Z Axis Up

LB down switches:

 ...

 Pickup/placement position; air blast threshold

"place component"reached? YES

 Start signal for upwards movement

Z axis starts:

 Z axis positioning upwards

Head firmware:

 Digital pressure control valve: switches air

blast OFF

 Reset "light barrier down" signal

Axis controller:

 Z axis measurement value for nozzle "empty"

and

 Z axis in safe area =

 Enable X, Y gantry axes.

Vacuum query:

 Vacuum threshold for holding circuit reached?

YES

 Star axis starts.

C&P20A

Board Descriptions for C&P20A Settings

Student Guide (FSE) SIPLACE X Series and X4I

Edition 01/2009 EN C&P20A

275

7.5 Settings

7.5.1 Board Descriptions for C&P20A

7.5.1.1 Head Adapter for C&P20A

7-41: Head Adapter for C&P20A

Legend

1 X1, X2 connection to intermediate distributor 5 H2 LED (green) for DP motor 24 V display

2 X5 Z axis track signals 6 H1 LED (red) for 24 V display at C&P20

3 X3 test connector: serial parallel interface (SPI)

bus

7 H3 LED (green) for component sensor display

4 X4 star track signals 8 H4 LED (red) for hardware error display at

C&P20A