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7 Vision Systems SIPLACE 80S /F/G User’s Manual 7.7 Guidelines for D escribing Package Forms Edition 07/97 from Software Version S R.010.xx 7 - 108 Line engine er 7.7. 6.5 Testing Ill umination S ettings You can s et the…
SIPLACE 80S/F/G User’s Manual 7 Vision Systems
Edition 07/97 from Software Version SR.010.xx 7.7 Guidelines for Describing Package Forms
Line engineer 7 - 107
Fig. 7.7.8 Illumination parameters of other components at the revolver head camera 19 x 25
Adjusting the illumination of other components
Light and dull body
( white, yellow, red, brown, grey,
metallic dull )
Light Ceramic body
Dark and dull body
( black, blue, green )
Reflective body
(independently of color and material)
Dull leads
flat: 180
steep: 180
Visual separation between leads
and body is not possible.
Illuminate body and leads equally.
Measure outline.
Shiny leads
Dull leads
Shiny leads
Clear separation
between leads
and body.
flat: 180 - 255
steep: 0 - 50*
Clear separation between
leads and body.
( applies to dull leads only )
Clear separation
between leads
and body.
J-Lead (PLCC), convex-type leads
Gullwing leads ( SO, QFP )
Dull leads
Shiny leads
flat: 120
steep: 150
flat: 120
steep: 180
Clear separation between body
and leads, if these are convex-
type. In the case of flat leads, will
depend on type, not recommended.
Clear separation
between leads
and body.
J-Lead ( PLCC ), convex-type leads
Gullwing leads ( SO, QFP)
flat: 120
steep: 180
flat: 140
steep: 90
Clear separation
between leads
and body.
Clear separation
between leads
and body.
Other lead shapes
Dull leads
Visual separation between leads
and body is not generally possible.
Shiny leads
Leads:
Outline:
Measuring method:
Visual separation between leads
and body is not possible.
Illuminate body and leads equally.
Measure outline.
flat: 120
steep: 180
Leads are outside the body.
Visual separation between leads
and body is not possible.
Measure outline or leads using
Center
me asuring mode.
J-Lead ( PLCC ), convex-type leads
Gullwing leads ( SO, QFP )
Other lead shapes
Convex-type leads
Other lead shapes
flat: 180
steep: 80 - 140
Visual separation between leads
and body is not generally possible.
Illuminate body and leads equally.
Measure outline.
flat: 120
steep: 180
Visual separation between leads
and body is not generally possible.
Center over body. In general not
recommended.
flat: 180
steep: 0
flat: 0
steep: 180
flat: 180
steep: 180
Measure outline.
Useful measurement is only pos-
sible when the leads are located
within the body.
flat: 180
steep: 180
* Only permissable
when the unevenness
of the body is no more
than 2°.
flat: 180
steep: 0 - 50*
Only possible with
convex-type leads.
flat: 150 - 255
steep: 0 - 50*
flat: 150 - 255
steep: 0 - 50*
Illumination level Brightness
7 Vision Systems SIPLACE 80S/F/G User’s Manual
7.7 Guidelines for Describing Package Forms Edition 07/97 from Software Version SR.010.xx
7 - 108 Line engineer
7.7.6.5 Testing Illumination Settings
You can set the illumination parameters by calling the 'Illumination' option (see Section 7.6.4.4, Page 7 - 92).
Using the Option “Measure component” you can then measure the component and check your settings with
the aid of the measurement results.
Proceed as follows to test your illumination setting:
●
Using the illumination values suggested in Figures 7.7.7 or 7.7.8 carry out measurement.
Measurement should run through successfully.
●
For each level reduce the set brightness level by 50%.
Measurement should run through successfully.
●
For each level raise the set brightness level by 50%.
Measurement should run through successfully.
If you are not successful with the above procedure, proceed as follows:
●
Starting with the suggested illumination value, increase the brightness of each individual illumination level
for as long as measurement is still successful.
●
Find this upper limit value for each individual illumination level in turn.
●
Starting with the suggested illumination value, decrease the brightness of each individual illumination level
for as long as measurement is still successful. Find this lower limit value for each individual illumination
level in turn.
●
Determine the average value of the upper and lower limit values. This will be the optimum illumination
value.
Example of an illumination test:
–
Settings from the diagram:
flat: 170
steep: 120
–
Measure the component. Measurement is successful.
–
Reduce setting values by 50 %.
flat: 85
steep: 60
–
Increase setting values by 50 %.
flat: 255
steep: 180
–
Measure the component. Measurement is successful.
–
Reset the settings to the suggested values:
flat: 170
steep: 120
➧
optimum setting
SIPLACE 80S/F/G User’s Manual 7 Vision Systems
Edition 07/97 from Software Version SR.010.xx 7.7 Guidelines for Describing Package Forms
Line engineer 7 - 109
NOTE
With respect to 0402 and 0603 components, avoid the nozzle being displayed during imaging. If this seems
likely, remove the component from the nozzle and use the 'Illumination Option' to see whether the nozzle did
appear in the image.
7.7.6.6 General Information on Setting Illumination Values
–
As a rule it is better to overilluminate the component than to underilluminate it. A saturated image is prefer-
able to a low-contrast image.
–
Optimum illumination is attained when only the leads are imaged and the component body is not shown.
–
If you cannot clearly separate the image of the component body from the leads, we recommend to illumi-
nate body and leads equally and then to measure the outline.
7.7.7 Setting the Components Illumination at the IC Head Camera
7.7.7.1 General Information on Illumination Methods
The idea of illumination setting is to obtain an image of the leads of a component which is as high-contrast as
possible. At the same time it is also important to suppress representation of the body of the component.
These instructions are intended to help you find the best possible illumination parameters. This, however,
does not imply that you rigidly comply with the values specified in these instructions. The way you should pro-
ceed is first to follow these instructions and then to adjust the parameters yourself where necessary. It may
well be that you come across one or other component the leads of which are better illuminated using values
different to the ones suggested in these instructions.
The illumination system comprises two different illumination levels. The intensities can be programmed indi-
vidually. By using the individual illumination levels one at a time or in combination with one another you can
adapt the illumination to suit a wide range of components.
Flat illumination level
The flat illumination level is used for illuminating BGAs, J-lead components (PLCC), and components with
convex-type leads. It tends to emphasize body and lead edges and suppresses reflective component sur-
faces.
Middle illumination level
The middle illumination level can be used universally with a wide range of components. With bright component
bodies, ceramic components and BGAs it should, however, only be used at lower intensity levels.