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6 Vision functions User Manua l SIPLACE F5/F5 HM 6.7 Guidelines for Describing Pa ckage Forms Software version S R.407.xx 01/2001 US Edition 382 6.7.9.4 T esting Ill umination Sett ings Y ou ca n set the ill uminatio n p…

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User Manual SIPLACE F5/F5 HM 6 Vision functions
Software version SR.407.xx 01/2001 US Edition 6.7 Guidelines for Describing Package Forms
381
Fig. 6.7 - 12 Illumination parameters for components on the 6-segment
Collect&Place head camera (DCA-option)
BGA, µBGA
Flip Chip
BGA,
µBGA,
Flip Chip
Power IC
IC
Gullwing
SO, SOT,
TSOP
QFP,
J-Lead
PLCC
Melf
Illumination
level
Brightness
Tantalum
capacitor
General
Reflective
body
150
255
Contrast
sensitivity
Chip
0805 and
larger
0402,
0603
Bare Die
0201,
50
50
50
50
0
50
80
100
230
230
20
20
X plane:
flat:
middle:
steep:
X plane:
flat:
middle:
steep:
X plane:
flat:
middle:
steep:
X plane:
flat:
middle:
steep:
X plane:
flat:
middle:
steep:
X plane:
flat:
middle:
steep:
X plane:
flat:
middle:
steep:
50
50
50
50
200
100
40
40
0
80
50
50
0
0
100
20
0
80
50
50
150
30
0
0
0
0
50
110
X plane:
flat:
middle:
steep:
X plane:
flat:
middle:
steep:
X plane:
flat:
middle:
steep:
Adjusting the illumination of standard components
6 Vision functions User Manual SIPLACE F5/F5 HM
6.7 Guidelines for Describing Package Forms Software version SR.407.xx 01/2001 US Edition
382
6.7.9.4 Testing Illumination Settings
You can set the illumination parameters by calling the ’Illumination’ option (see Section 6.6.4.8 on
page 325
). Using the ’Measure Component Option’ on page 311 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 - 12 carry out measurement. Measure-
ment 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:
X-plane 200
flat: 100
middle: 40
steep: 40
– Measure the component. Measurement is successful.
– Reduce setting values by 50%.
X-plane 100
flat: 50
middle: 20
steep: 20
User Manual SIPLACE F5/F5 HM 6 Vision functions
Software version SR.407.xx 01/2001 US Edition 6.7 Guidelines for Describing Package Forms
383
– Increase setting values by 50%.
X-plane 255
flat: 150
middle: 60
steep: 60
– Measure the component. Measurement is successful.
– Reset the settings to the suggested values:
X-plane 200
flat: 100
middle: 40
steep: 40
© optimum setting
NOTE 6
With respect to 0402 components, avoid the nozzle being displayed during imaging. If this seems
likely, remove the component from the nozzle and use the ’Illumination Option
’ (see page 325 to
see whether the nozzle did appear in the image.
6.7.9.5 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.
6