80S-20用户手册 - 第358页

6 Vision functions SIPLA CE 80S-20/F4 User Manual 6.7 Guidelines for Describing Package Forms Software version SR.407.xx 01/2001 US Edition 358 6.7.7.5 T esting Illumination Settings Y o u can s et th e illum ination par…

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SIPLACE 80S-20/F4 User Manual 6 Vision functions
Software version SR.407.xx 01/2001 US Edition 6.7 Guidelines for Describing Package Forms
357
6
Fig. 6.7 - 10 Illumination parameters for other components on the fine pitch vision module
Adjusting the illumination of other components
Light and dull body
( white, yellow, red, brown
, grey,
metallic dull )
Ceramic body
Dark and dull body
( black, blue, green )
Reflective body
(independently of color and material)
Dull leads
flat: 70
middle: 60
steep: 150
Visual separation betwe
en leads
and body is not possible.
Illuminate
body and leads equally.
Measure outline.
Shiny leads
Clear separation
between leads
and body.
Dull leads
flat: 150
middle: 120
steep: 0 - 20
Shiny l
eads
1. Illuminate body and leads equally.
Measure outline.
2. Trick: Use flat and middle levels to
bring leads image to saturation.
Measure.
Clear separation
between lea
ds
and body.
for variant 2: flat: 150 - 255
middle: 60 - 150
steep: 0 - 2
0
flat: 200
middle: 80
steep: 0 - 20
flat: 120
middle: 80
steep: 0 - 20
Clear separation
between leads
and body.
Clear separation
between leads
and body.
J-Lead ( PLCC ), convex-type leads
Gullwing leads ( SO, QFP )
Dull leads
Shiny leads
flat: 120
middle: 50
steep: 170
fla
t: 170
middle: 50
steep: 120
Clear separation
between leads
and body.
Clear separation
between leads
and body.
J-Lead ( PLCC ), convex-typ
e leads
Gullwing leads ( SO, QFP)
flat: 170
middle: 50
steep: 120
flat: 80
middle: 40
steep: 120
Clear separation
between leads
and body.
Clear separation
between leads
and body.
Other lead shapes
Dull leads
fla
t: 170
middle: 50
steep: 120
Visual separation between leads
and body is not generally possible.
Shiny leads
flat: 0
middle: 0 - 10
steep: 100 - 255
Clear separation
between leads
and body.
flat: 0
middle: 0 -
10
steep: 150 - 255
Leads:
Outline:
Measuring method:
Visual separat
ion between leads
and body is not possible.
Illuminate body and leads equally.
Measure outline.
flat: 170
middle: 50
steep: 120
Visual separation between leads
and body is not possible. Measure
outline or lead tips. Leads are
outside the body.
flat: 80
middle: 40
steep: 120
J-Lead ( PLCC ), convex-type leads
Gullwing leads ( SO, QFP )
Other lead shapes
Convex-type leads
flat: 70
middle: 60
steep: 150
Other lead shapes
flat: 0
middle: 0 - 20
steep: 200 - 255
Visual separation between leads
and body is not generally possible.
Illuminate body and leads equally.
Measure outline.
Illumination level Brightness
6 Vision functions SIPLACE 80S-20/F4 User Manual
6.7 Guidelines for Describing Package Forms Software version SR.407.xx 01/2001 US Edition
358
6.7.7.5 Testing Illumination Settings
You can set the illumination parameters by calling the ’Illumination’ option (see Section 6.6.4.8 on
page 311
). Using the ’Measure Component Option’ on page 297 you can then measure the com-
ponent and check your settings with the aid of the measurement results. 6
Proceed as follows to test your illumination setting: 6
Å Using the illumination values suggested in Figures 6.7 - 9 or 6.7 - 10 carry out measurement.
Measurement should run through successfully.
Å For each level reduce the set brightness level by 50 %.
Measurement should run through successfully.
Å 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: 6
Å Starting with the suggested illumination value, increase the brightness of each individual illu-
mination level for as long as measurement is still successful.
Å Find this upper limit value for each individual illumination level in turn.
Å Starting with the suggested illumination value, decrease the brightness of each individual illu-
mination level for as long as measurement is still successful. Find this lower limit value for each
individual illumination level in turn.
Å Determine the average value of the upper and lower limit values. This will be the optimum illu-
mination value.
Example of an illumination test: 6
– Settings from the diagram:
flat: 170
middle: 60
steep: 5
– Measure the component. Measurement is successful.
– Reduce setting values by 50%.
flat: 85
middle: 30
steep: 2
– Increase setting values by 50%.
flat: 255
middle: 90
steep: 8
SIPLACE 80S-20/F4 User Manual 6 Vision functions
Software version SR.407.xx 01/2001 US Edition 6.7 Guidelines for Describing Package Forms
359
– Measure the component. Measurement is successful.
– Reset the settings to the suggested values:
flat: 170
middle: 60
steep: 5
© optimum setting
6
6.7.7.6 General Information on Setting Illumination Values
– As a rule it is better to overilluminate the component than to underilluminate it. A saturated im-
age is preferable 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 recom-
mend to illuminate body and leads equally and then to measure the outline.