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Component Shapes Specific Component Shapes Shields S tudent Guide SIPLACE V ision (Customer) Component Shapes Edition 12/2008 EN 92 Corner description Joint datasets with ICOS data NOT pos s ible due to new recognition m…

Component Shapes

Shields Specific Component Shapes

Student Guide SIPLACE Vision (Customer)

Edition 12/2008 EN Component Shapes

5.3.11 Shields

Since corners could be recognized on shields or frames, components of this type are defined in a

separate class. The pseudo description of leads on the shield body edges (as in ICOS) is therefore not

required.

5.3.11.1 Shield Component Shape

JEDEC description

 One or more groups are possible, with more than four corners. A group angle or X and Y group offset

does not need to be defined. In the type Corner, each starting or end point of the two corner lines is

defined with X and Y coordinates.

 The shortest length of the corner line is 1.8 mm (depending on the camera). Reliable distribution of

measurement points can not be guaranteed below this.

 At least two recognized corners are needed to center a Shield.

Additional descriptions are permitted, with one circle per group.

Group description

Body description: polygons are permitted as body shapes for

Shields (an all-enclosing rectangle is easier to program!).

 The Z-height of the body determines the CO height for the

Z positioning profile and the Z-position for centering with the

stationary camera.

 The X/Y body determines the size of the field of vision,

known as the Region of Interest and the rectangular outline

of the Shields.

 Lead type corner or polygon circle.

The leads are positioned within the body. The feature angle

is always 0°. The setting Hell can be set to Dark for circles.

 To recognize corners, a recognition field is drawn to the left

of the programming line, for the trimming the Shield. The

two vectors should have roughly the same lengths. Circle

programming is performed according to the principle for

BGA ball leads. However, recognition of polygon circles

uses a totally different method.

 The diagram only shows the different, possible corners;

NEVER program so many (3-4 is ALWAYS sufficient).

Component Shapes

Specific Component Shapes Shields

Student Guide SIPLACE Vision (Customer)

Component Shapes Edition 12/2008 EN

Corner description

Joint datasets with ICOS data NOT possible due to new recognition methods

There are inner and outer corners:

 The 1st programming type SV defines each starting and

end point with X/Y coordinates.

Due to the possible radiuses or recesses in the corners, the

recognition lines are not placed right into the corners of the

Shield!

This coordinate data is also stored in SIPLACE Pro.

 The 2nd programming mode radius can also be taught

online. In this case, the corner coordinates; the opening

angle of the 1st recognition line to the X body axis; the

distance of the recognition vector to the corner (radius 1/2)

and its length are programmed. The radius dataset is then

converted.

The coordinate or radius dataset is most effectively

calculated by using the mouse to mark the corners. Ensure

an accurate fit, as the coordinate values will later determine

the placement accuracy! The body dimensions must be

correct and match those in the teaching template.

 The illumination/evaluation ensures that these corners can

be recognized.

 Corner programming in SIPLACE Pro can be performed

with eight X/Y coordinates for the respective corner

recognition starting and end points.

 The procedure for 90° corners is somewhat simpler in

SIPLACE Pro: In tis case, the center point -> corner

coordinates are programmed and the eight corner

characteristic coordinates are then programmed based on

this corner (four of these coordinates are always 0).

 In the case of corners which do not have 90°, the simplest

method at the moment is to program in SIPLACE Vision, at

the station and using point, line or radius programming in

teach mode.

Punkt 1.1

nicht prog. (90°)

Punkt 1.2

Punkt 2.1 Punkt 2.2

Öffnungswinkel

90°

Eckenw.=0°

Radius1 Länge1

Eckpunkt X/Y

ussenecken

-90° Eckenwin.=0°

+X 180° 90°

Component Shapes

Shields Specific Component Shapes

Student Guide SIPLACE Vision (Customer)

Edition 12/2008 EN Component Shapes

5.3.11.2 Special Features for Shields

 Shields are sheet metal with curved edges in a wide range of body shapes, some with openings/

holes drilled through; inner and outer corners and various opening angles.

 The evaluation times increase with the programmed angle tolerances.

 Various corner filters: four corner filter types are possible, depending on the different shield edges

used.

 Filter type 248 e.g. for edge springs;

 Default setting: Several position candidates

are permitted for each edge, although each

candidate must be above the gradient

threshold. Each edge is also subjected to an

additional scan. This singles out poor quality

edges, primarily candidates caused by

springs.

 Filter type 249, for good edge quality;

 Outer edge: Always takes the outermost

position (as seen when looking from outside

the component) above the gradient threshold

(in the case of double edges, caused by

indentations in the Shield and steep

illumination). The system only considers

edges which are within the yellow search

frame.