SIPLACE S-23 HM - 第411页

User Manual SIPLACE S-23 HM 11 Station extensions / hardware Software Version S R.406.xx 02/00 US Edition 11.6 Feeder position recognition 411 1 1 .6 Feeder position reco gnition If the fe eder modu les a re equip ped wi…

11 Station extensions / hardware User Manual SIPLACE S-23 HM

11.5 Ceramic substrate centering Software Version SR.406.xx 02/00 US Edition

410

Fiducial structure 11

Recommendation 1

Fiducial structure Black resistive paste as the background, with conductive paste printed on it as

the fiducial.

Recommendation Background 0.75 mm larger than the fiducial on all sides.

Method of illumination Normal light

Advantage Good contrast, good sharpness;

Reference Circuit-board conductor layer

Assessment This combination gives the best results. Highly recommended.

Recommendation 2

Fiducial structure Fiducial made from circuit-board conductor material, e.g. 6119, and overprinted

with passivated glass 4330.

Method of illumination Oblique light

Advantage No additional steps required

Reference Circuit-board conductor layer

Assessment Fiducials are less sharp than for recommendation 1. Recommended.

Recommendation 3

Fiducial structure Fiducials made from circuit-board conductor layer against a free ceramic back-

ground.

Method of illumination Oblique or normal light (depending on the paste)

Advantage No additional steps required

Reference Circuit-board conductor layer

Note Fiducials are less sharp than for recommendation 2.

The fiducial image depends on the surrounding free surface. It may be neces-

sary to teach every circuit separately.

Assessment Recommended under certain conditions.

User Manual SIPLACE S-23 HM 11 Station extensions / hardware

Software Version SR.406.xx 02/00 US Edition 11.6 Feeder position recognition

411

11.6 Feeder position recognition

If the feeder modules are equipped with positioning fiducials, the fiducials can be measured.

If the "Conveyor position detection" function has been selected on the line computer, the function

will also appear in the Machine options. It can then be activated or deactivated at each station.

Fig. 11.6 - 1 Feeder position recognition

PLEASE NOTE 11

The "Feeder position recognition" function is always deactivated when the station is switched on. 11

If a track has been entered in the cluster data, the PCB camera on the feeder module will ap-

proach the position of the centering fiducial. Any centering fiducial offset determined during the

measurement will then be assigned to this track and added to the pick-up position during the pick-

up operation. 11

11 Station extensions / hardware User Manual SIPLACE S-23 HM

11.7 PCB data transfer Software Version SR.406.xx 02/00 US Edition

412

11.7 PCB data transfer

11.7.1 Functional description

The ’Machine options’ menu contains a ’PCB data transfer’ option. The aim of this function is to

increase the placement system’s performance on the line. To do this, an entire PCB is measured

at the

first

placement station and the associated fiducial, single circuit, ink spot, etc. data is deter-

mined, saved and sent to the next station. At subsequent stations, the data is then determined for

two fiducial positions only. These two fiducial positions are then used to correct the position for the

PCB to be processed at each station. It is thus not necessary to measure the entire PCB again,

together with its single circuits, ink spots etc. 11

11.7.2 Activating the ’PCB data transfer’ option

Fig. 11.7 - 1 Machine option: PCB data transfer