80S-2080F480F4-680F5 User’s Manual - 第363页

5 Vision Functions SIPLACE 80S-20/F4/F4-6/F5 User’s Manual 5.7 Guidelines for D escribing Package Form s Edition 03/98 from Software Vers ion SR.404.xx 5 - 142 Line engine er . Fig. 5.7. 11 Illumination parameters for co…

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SIPLACE 80S-20/F4/F4-6/F5 User’s Manual 5 Vision Functions
Edition 03/98 from Software Version SR.404.xx 5.7 Guidelines for Describing Package Forms
Line engineer 5 - 141
5.7.8.2 Pseudo color representation
The pseudo color representation provides a powerful and objective assessment of the illumination, by repre-
senting a brightness value in a color.
A contrast of at least 4 color scales between the lead and body is required for a measurement. In the ‘Illumina-
tion’ menu of the package form manipulator, components are displayed in the pseudo color representation on
the station computer monitor.
5.7.8.3 Settings for Illuminating Components
The standard range of components includes chips (0603 to 2220), tantalum capacitors, Melf components,
PLCCs, QFPs, SOs, SOJs, TSOPs, ICs, power components, flip-chips, µBGAs and BGAs.
For the components which are listed below the GF interpreter in the station computer uses the default illumi-
nation parameters listed in Fig. 5.7.11:
– Chips (0603 to 2220)
– Tantalum capacitors (component bodies, non-reflective)
– Melf
– PLCC, QFP, SO, SOJ, TSOP, ICs, power ICs
– Flip-chips, µBGAs, BGAs
The special components include:
– Power transistors
– Plugs
– PLCC base
– Quartz timers
As a rule you will not need to change the illumination parameters for the components.
Color scale Brightness
white light
yellow
orange
red
brown
green
light blue
blue
violet
black dark
Tab. 5.7.5 Conversion table for the pseudo color representation at the 6x revolver head
5 Vision Functions SIPLACE 80S-20/F4/F4-6/F5 User’s Manual
5.7 Guidelines for Describing Package Forms Edition 03/98 from Software Version SR.404.xx
5 - 142 Line engineer
.
Fig. 5.7.11 Illumination parameters for components at the 6x revolver head camera (32x32)
D ia g r a m fo r a d ju s tin g th e illu m in a tio n o f c o m p o n e n ts
Chip
IC
Melf
BGA
Tantalum
capacitor
fla t: 1 5 0
steep:150
J-Lead
PLCC
fla t: 7 0
steep: 140
Ceram ic
BGA
fla t: 0
steep: 255
Plastic
BGA
0805 and
larger
fla t: 2 0 0
steep: 120
0603
fla t: 1 5 0
steep: 200
G eneral
fla t: 1 2 0
steep: 150
fla t: 2 5 5
steep: 130
fla t: 2 0 0
s te e p : 0
G u llw in g
SO, SO T,
TSO P
QFP,
Special com ponents
Power
transistor
fla t: 2 5 5
steep: 150
PLCC-
socket
fla t: 0 - 3 0
steep:150-200
Plug
fla t: 0
steep: 150-200
Q uartz
fla t: 2 0 0
steep:120-180
TBG A
re fle c t. b o d y
fla t: 2 0 0
s te e p : 0
TBG A
dull
fla t: 0
steil:150-200
approx. 180
255
If necessary,
use the LU T
below
1
Reflect.
body
fla t: 2 5 5
steep: 40
8
6
2
7
5
3
4
6
1
2
3
4
5
D o not use for reflective com ponents.
U se negative ball contrast w hen m apping the ball.
The description m ust only contain the innerm ost row of balls. U se negative contrast.
It m ust be possible to insert the com ponents. The test m ust be carried out for each type.
7
The edge of the large cooling surface is extrem ely irregular on som e types on account of the production m ethods used.
If you are unsure, do not use it for the m easurem ent
U p to PLC C 52 base. M ake sure that you are using the correct nozzle.
D escribe as for a BG A , if necessary.
8
D escribe as for an FD C . M easuring m ode: size+ lead
150
255
C ontrast
graduation
SIPLACE 80S-20/F4/F4-6/F5 User’s Manual 5 Vision Functions
Edition 03/98 from Software Version SR.404.xx 5.7 Guidelines for Describing Package Forms
Line engineer 5 - 143
5.7.8.4 Testing Illumination Settings
You can set the illumination parameters by calling the ’Illumination’ option (see Section 5.6.4.8, Page 5 - 101).
Using the 'Measure Component Option' 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 Fig. 5.7.11 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: 150
steep: 180
– Measure the component. Measurement is successful.
– Reduce setting values by 50%.
flat: 75
steep: 90
– Increase setting values by 50%.
flat: 225
steep: 255
– Measure the component. Measurement is successful.
– Reset the settings to the suggested values:
flat: 150
steep: 180
¬ optimum setting