00196504-02_UM_X-Serie_SR70X_EN.pdf - 第419页

User manual SIPLACE X-series Station extensions From software version SR.70x.xx 0 1/2011 EN edition Siemens interface 419 The PCB is transported into the placemen t area un til the laser light barrie r trigger s the stop…

Station extensions User manual SIPLACE X-series

PCB alignment From software version SR.70x.xx 01/2011 EN edition

418

6.11 PCB alignment

Item no. 00119677-xx PCB alignment, single conveyor, SIPLACE HF/X/D3 (not for X4I)

Item no. 00119678-xx PCB alignment, dual conveyor, SIPLACE HF/X/D3 (not for X4I)

6.11.1 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 (HS-50, S-25 HM, F5 HM) and on machines

that monitor this position with laser light barriers (X-series, HF-series, HS-60, S-27 HM). 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.

Fig. 6.11 - 1 PCB alignment

(1) Lifting table

(2) PCB stop

User manual SIPLACE X-series Station extensions

From software version SR.70x.xx 01/2011 EN edition Siemens interface

419

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.

6.12 Siemens interface

Item no. 00116808-xx SIPLACE interface HF/X/D3

The conveyor interface on the placement machines from the 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 X-series machines to the Siemens standard and

connect the machines using the associated interface cable.

More detailed information can be found in the Siemens conveyor interface retrofit instructions",

item no. 00194343-01.

Station extensions User manual SIPLACE X-series

Magnetic pin support From software version SR.70x.xx 01/2011 EN edition

420

6.13 Magnetic pin support

Item no. 00119680-xx Magnetic pin support HS/HF/X/D-series

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. 6.13 - 1 Magnetic pin support