00196457-05_UM_SX12DX12_SR706_EN.pdf - 第356页

6 Station extensions User manual SIPLACE SX1/SX2/DX1/DX2 6.10 PCB alignment From software version SC.706.xx Version 06/2012 EN 356 6.10 PCB alignment Item no. 001 1 9677-xx PCB alignme nt, single convey or Item no. 001 1…

User manual SIPLACE SX1/SX2/DX1/DX2 6 Station extensions

From software version SC.706.xx Version 06/2012 EN 6.9 Component camera for the MultiStar

355

6.9.1.1 Technical data

6.9.1.2 Position

The position of the stationary component cameras and the associated configurations are de-

scribed

in section 3.9.2

, from page 154.

Component dimensions 0.5 mm x 0.5 mm to 55 mm x 45 mm

Component range 0402, MELF, SO, PLCC, QFP, electrolytic capacitors, BGA

Min. lead pitch 0.3 mm

Min. lead width 0.15 mm

Min. ball pitch 0.35 mm

Min. ball diameter 0.2 mm

Field of vision 65 mm x 50 mm

Illumination type Front-illumination (6 levels, programmable as required)

6 Station extensions User manual SIPLACE SX1/SX2/DX1/DX2

6.10 PCB alignment From software version SC.706.xx Version 06/2012 EN

356

6.10 PCB alignment

Item no. 00119677-xx PCB alignment, single conveyor

Item no. 00119678-xx PCB alignment, dual conveyor

6.10.1 Description

PCBs to be processed sometimes have a length to width ratio of 1:2 or worse. This means that

the shorter side of the PCB points in the direction of travel. During travel, such PCBs may twist

slightly and, as a result, the fiducials no longer lie within the PCB vision camera's search window.

In this case, the "PCB alignment" option ensures that these PCBs are realigned precisely at the

stopping position.

If PCBs with recesses in the direction of travel are processed, this may result in different process-

ing

positions on machines with mechanical stoppers and on machines that monitor this position with

laser light barriers. The "PCB alignment" option ensures that the PCBs are stopped at the same

position on all PCB conveyors. The "PCB alignment" option is available for both single and dual

conveyors.

The PCB is transported into the placement area until the laser light barrier triggers the stop signal

for the PCB conveyor. The lifting table with the PCB stops then moves up into a position in which

the PCB is not yet clamped and can still be moved by the conveyor belts. The two PCB stops are

level with the PCB, and the PCB supports (magnetic pins) are already in contact with the PCB.

The two conveyor belts move the PCB against the PCB stops and align them at the same time.

The lifting table then moves into its top end position, clamps the PCB and releases it from the PCB

stops so as not to affect the placement process. After the placement process, the lifting table and

PCB alignment are lowered and the PCB is moved on.

6.11 Siemens interface

Item no. 00116808-xx SIPLACE interface

The conveyor interface on the placement machines from the SX and X series is configured to the

SMEMA

standard. It is, however, still possible to use this interface in accordance with the Siemens stan-

dard. This is a significant benefit when an X-series machine is to be integrated into older SIPLACE

lines, in which case it would not be necessary to retrofit the older machines to conform to the

SMEMA standard.

Simply configure the conveyor interface of the SX series and X-series machines to the Siemens

standard and

connect the machines using the associated interface cable.

User manual SIPLACE SX1/SX2/DX1/DX2 6 Station extensions

From software version SC.706.xx Version 06/2012 EN 6.12 Magnetic pin support

357

6.12 Magnetic pin support

Item no. 00119680-xx Magnetic pin support

Wide boards tend to deflect during placement such that, under certain circumstances, the compo-

nents can no longer be placed with the desired accuracy. Highly curved PCBs also affect the

placement accuracy. This problem can be easily rectified by fitting magnetic pin supports on the

lifting table.

Fig. 6.12 - 1 Magnetic pin support

NOTE

The free positioning of magnetic pin supports is limited by the stop bar of the board conveyor. 6