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User Manual S-23 HM 6 Vision functions Software Vers ion SR.405.xx 05/99 Iss ue 6.6 Test Component 249 – F actor fo r the qual ity of me asureme nt. Use Esc to qu it this option. Th e video i mage d isappears and the T e…

6 Vision functions User Manual S-23 HM

6.6 Test Component Software Version SR.405.xx 05/99 Issue

248

Fig. 6.6 - 21 Test component menu, Measure component video image

Optical surveying of conventional components with lead connections 6

The crosshairs indicate the component’s center. The component outlines are emphasized in

color. 6

The measured values represent the geometric component parameters such as 6

– Lead skew

The value for lead skew will be indicated if you have selected the lead or ball measurement

mode.

–Pitch

The value for pitch will be indicated if the corner measurement mode is active as the last mea-

surement step.

– Number of leads

– x / y offset

– Orthogonality

– Dimensions of the component

–Skew and

Measure component GF No. = 5

X offset = ... Y offset = ... Phi = ...

Orthogon = ...

No. of pins = ...

Quality fact. = ...

Length[mm] = ...

Width[mm] = ...

Spacing[mm] =

RET: Measure component

P.dev.[mm] =

User Manual S-23 HM 6 Vision functions

Software Version SR.405.xx 05/99 Issue 6.6 Test Component

249

– Factor for the quality of measurement.

Use Esc to quit this option. The video image disappears and the Test component menu is dis-

played once more on the screen. 6

Color overlays of the individual measurement steps during step mode 6

1. Size-driven mode 6

See Section 6.6.4.14 on page 273 for a definition of the measuring methods. 6

You can recognize this measurement method by rotating windows around the component edges 6

Procedure: 6

(1) Inside the search window, profiles are created in the x and y directions. With the aid of the

gradients thus formed and a geometric filter, the approximate position of the component is

determined.

(2) Windows rotate around the component’s edges. The profile and gradients are determined for

each window. The sum of the gradients is an indication of the agreement of the window angle

with the position of the component.

If the sum of the gradients reaches a maximum, the angular position of the component has

been determined.

(3) Under the angle determined in step (2) the first step (1) is repeated. Now it will be possible

to determine the position of the component in the x and y directions more accurately.

Rectangles:

green: x and y pick-up tolerances 6

orange: component dimensions and tolerances supplied by the station 6

blue: search area for position recognition 6

Comments 6

1. The position of the component as determined must be within the green rectangle

otherwise the component will not be placed. 6

Applies to all measurement steps! 6

2. The component must be located within the orange window. Otherwise the measurement

results will not be dependable. 6

3. The search areas should have the same alignment as the component and also be larger

than the component. 6

6 Vision functions User Manual S-23 HM

6.6 Test Component Software Version SR.405.xx 05/99 Issue

250

Lines: 6

red: Edges of the component detected 6

Comments: 6

The red lines may often be covered by others and thus possibly not detectable. 6

Overlay: 6

gray: Profile in the integration direction in question 6

blue: Gradients from the above profiles 6

yellow: Results from the geometric filter 6

red: Interpolation limits for position determination 6

light blue: Results of interpolation -> Position 6

Comments: 6

The results of interpolation should be found around the maximum of the geometric filter. 6

Cross: 6

white: Results of position recognition -> x and y angles 6

Diagram: 6

Results function of the angle search (rotating windows). 6

Comments: 6

The minimum (corresponds to the maximum of the sum of the gradients) indicates the non-

interpolated angular position. The final results (via interpolation) are indicated by a light blue

line. The precision of the diagram is limited by the resolution of the monitor. 6

2. Row-driven mode

See Section 6.6.4.14 on page 273 for a definition of the measuring methods. 6

You can recognize this measurement method by the presence of windows around the central lead

of a row of leads. 6

Procedure: 6

(1) Position recognition takes place by creating a profile vertical to the direction of the rows. In

this way the edges of the component are determined.

(2) With two additional windows the angular position of the component can be determined.