SIPLACE X4 S micron X4i S micron.pdf - 第33页

33 SIPLACE Vision PCB position recognition Technical Data and Inkspot Criteria Ink spot criteria Methods • Synthetic fiducial recogn ition method • Mean gray scale value • Histogram method • Pattern recognition Shapes an…

SIPLACE Vision

PCB position recognition

Fiducial criteria

Locate 2 fiducials

Locate 3 fiducials

X-/Y-position, rotation angle, mean PCB distortion

Additional: shearing, distortion separately in X and Y direc-

tion

Fiducial shapes Synthetic fiducials: circle, cross, square, rectangle, dia-

mond, circular, square and rectangular contours, double

cross, pattern: any

Dimensions of patterns

Min. size

Max. size

0.5 mm

3 mm

Fiducial environment Clearance around reference fiducial not necessary if there

is no similar fiducial structure in the search area

Dimensions of synthetic fiducials

Min. X/Y size for circle and rectangle 0.25 mm

Min. X/Y size for annulus and rectangle 0.3 mm

Min. X/Y size for cross 0.3 mm

Min. X/Y size for double cross 0.5 mm

Min. X/Y size for diamond 0.35 mm

Min. frame width for annulus and rectangle 0.1 mm

Min. bar width / bar distance for cross, double-cross 0.1 mm

Max. X/Y size for all fiducial shapes 3 mm

Max. bar width for cross/double-cross 1.5 mm

Minimum tolerances generally 2% of nominal dimension

Max. tolerances generally 20% of nominal dimension

SIPLACE Vision

PCB position recognition

Technical Data and Inkspot Criteria

Ink spot criteria

Methods • Synthetic fiducial recognition method

• Mean gray scale value

• Histogram method

• Pattern recognition

Shapes and sizes of fiducials/structures for

Synthetic fiducials

Other methods

For dimensions of synthetic fiducials, see page

Min. 0.3 mm

Max. 5 mm

Masking material Good coverage

Recognition time Depends on the method: 20 ms - 200ms

Description

In the cluster technology

each subpanel is assigned

an inkspot. If this is present

during the measurement via

the PCB vision module, the

corresponding subpanel will

not be populated. This func-

tion helps prevent unneces-

sary costs caused by

placement of defective pan-

els.

Technical data for PCB position detection

PCB fiducials

Local fiducials

Library of bad panel recognition

Up to 3 (subpanels and multiple panels)

Up to 6 for the long board option (optional PCB fiducials

are output by the optimization.)

Up to 2 per PCB (may be of different type)

Up to 255 fiducial types per subpanel

Image analysis Edge detection method (singular feature) based on gray

scale values

Illumination type Front lighting

Fiducial recognition time 0.1 s

Field of vision 5.78 mm x 5.78 mm

Virtual inkspot handler (option)

The virtual inkspot handler allows you to scan in inkspots from an external system. These ink-

spots can then be allocated to the relevant board.

SIPLACE Vision

Barcode and Data Matrix Codes

Description and technical data

Description

The PCB camera can read

either a barcode or a data

matrix code. The data can be

used for traceability pur-

poses.

The barcode can be on the

board itself or on a compo-

nent. In addition, it is also

possible to attach a barcode

label to a board or a compo-

nent and to then read this

barcode label with the PCB

camera, directly after place-

ment. The focal height must

be taken into account during

reading, if there is a barcode

or barcode label on the top of

a component.

Data Matrix Codes

Code types supported Only Data Matrix ECC 200 is supported.

No. rows/columns All combinations of rows/columns as defined in the standard will be

accepted, including rectangular symbols and large symbols with multi-

ple data areas.

Minimum dot size 50 µ

Maximum size of data matrix

codes

≤ 30 mm and Y ≤ 30 mm, or

X ≤ 10 mm and Y ≤ 100 mm, or

≤ 100 mm and Y ≤ 10 mm

Symbol angle All symbol angles will be accepted.

Inverse symbols Inverse symbols (light modules on a dark background) will be

accepted.

Mirrored symbols Mirrored symbols will be accepted.

(Station software version 707.1 SP2 or higher required)

Ratio of column width to row

height

1/2

≤ (column width) / (row height) ≤ 2

Region of Interest (ROI) The area in which the barcode is searched for (ROI) should not

exceed the following values:

Width of ROI

≤ 6 * width of barcode symbol

Height of ROI

≤ 6 * Height of barcode symbol

Contrast Minimum 20 gray values.

Print growth The size of a module must be at least 1/3 of the cell size in the data

matrix grid.

The size of a module must be at most 5/3 of the cell size in the data

matrix grid.