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6 Vision functions User Manual HS-50 6.6 Test Component Software-Version 5.01 Edition 01/99 260 Rectangle s: green: x and y pick-up toleran ces orange: component di mensions and t oleranc es su pplied by the station …
User Manual HS-50 6 Vision functions
Software-Version 5.01Edition 01/99 6.6 Test Component
259
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The crosshairs indicate the component’s center. The component outlines are emphasized in color.
The measured values represent the geometric component parameters such as
– Lead skew
The value for lead skew will be indicated if you have selected the OHDGGULYHQ measurement
mode.
–Pitch
The value for pitch will be indicated if the FRUQHUGULYHQ measurement mode is active as the
last measurement step.
– Number of leads
– x / y offset
– Orthogonality
– Dimensions of the component
– Skew and
– Factor for the quality of measurement.
Use (VFto quit this option. The video image disappears and the 7HVWFRPSRQHQW menu is dis-
played once more on the screen.
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See Section 6.6.4.14 on page 6 - 281 for a definition of the measuring methods.
You can recognize this measurement method by rotating windows around the component edges
Procedure:
(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.
6 Vision functions User Manual HS-50
6.6 Test Component Software-Version 5.01 Edition 01/99
260
Rectangles:
green: x and y pick-up tolerances
orange: component dimensions and tolerances supplied by the station
blue: search area for position recognition
Comments
1. The position of the component as determined must be within the green rectangle
otherwise the component will not be placed.
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2. The component must be located within the orange window. Otherwise the measurement
results will not be dependable.
3. The search areas should have the same alignment as the component and also be larger
than the component.
Lines:
red: Edges of the component detected
Comments:
The red lines may often be covered by others and thus possibly not detectable.
Overlay:
gray: Profile in the integration direction in question
blue: Gradients from the above profiles
yellow: Results from the geometric filter
red: Interpolation limits for position determination
light blue: Results of interpolation-> Position
Comments:
The results of interpolation should be found around the maximum of the geometric filter.
User Manual HS-50 6 Vision functions
Software-Version 5.01Edition 01/99 6.6 Test Component
261
Cross:
white: Results of position recognition-> x and y angles
Diagram:
Results function of the angle search (rotating windows).
Comments:
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.
2. Row-driven mode
See Section 6.6.4.14 on page 6 - 281 for a definition of the measuring methods.
You can recognize this measurement method by the presence of windows around the central lead
of a row of leads.
Procedure:
(1) Position recognition takes place by creating a profile vertical to the direction of the leads. In
this way the edges of the component are determined.
(2) With two additional windows the angular position of the component can be determined.
Rectangles:
green: x and y pick-up tolerances
light blue: $ 2 to 4 search windows for position recognition. These are positioned
around the central lead of each row of leads.
% 2 additional search windows for angular measurement. The two
windows are located on the same row of leads.
Star:
orange: Results of approximate search
Comments:
The star indicates the position in the direction of the leads. Depending on which measure-
ment algorithm has been selected the middle or the tip of the lead will be displayed.