Specification SIPLACE X-Series S 规格说明书 - 第40页

40 SIPLACE Vision PCB position recognition Technical Data and Inkspot Criteria Ink spot criteria Methods • Synthetic fidu cial recognition 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 39

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 corre-

sponding subpanel will not

be populated.

This function helps prevent

costs caused by unneces-

sary placement of defective

panels.

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

SIPLACE Vision

Barcode types

Technical data

The PCB camera can read a

Data matrix code, a 1D bar-

code or a QR code. The

data can be used for trace-

ability purposes.

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.

General information for all barcode types

Data matrix codes

Ambiguity No read errors are issued if multiple valid barcode symbols are found in a

particular region of interest (ROI). In this case, there is no clear rule, defin-

ing which of these valid barcode symbols would be read.

Ambiguity can be avoided by:

• Using a suitable ROI size

ASCII null characters Barcode information should not contain any ASCII null characters (ASCII

NULL), as the 0 byte in the software is interpreted as an final (end) char-

acter.

Code type 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 multiple

data areas.

Minimum dot size 5 pixels.

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.

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