User-Manual-of-NeoDen4-PNP-machine.pdf - 第37页
32 After finishe d the steps a bove, click “Get Came ra Angle ” to get the n umber. Round the angle nu mber off to 1 d ecimal plac e, the n fill it into "Upgr ade photograph an gle" an d save the da ta, see the…
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Click button to take pictures of nozzles and adjust the threshold until the cross is at the center of
nozzles.
Click the button to take a picture for nozzle No.2.Using the same method above to adjust the
threshold until the angle is -0.00 degree.
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After finished the steps above, click “Get Camera Angle” to get the number.
Round the angle number off to 1 decimal place, then fill it into "Upgrade photograph angle" and save
the data, see the Figure 4.31.
Figure 4.31
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4.7.7 First trial and testing
（1） First dry run
Usually we would suggest you to have a dry run (no components are loaded) before production test.
After it goes smoothly, you can start to produce few boards.
（2） Production test
a. Make a programming file
b. Test the file to pick and place components.
（3） Inspection
a. Inspection Items
Check if the specification, direction, polarity of components is aligned with what they should be.
Whether the components are damaged or the pins are distorted.
Whether the component is off beyond allowance.
b. Inspection Methods
The inspection methods vary from the equipment that you have.
Except visual inspection, all of amplifier, microscope, online or offline AOI equipment can be
applied if the pitch of IC is quite small to check.
c. Inspection Standard
Please follow SOP to do inspection or any other general standards (IPC Standard and SJ / T10670-
1995 SMT General Technical Requirements)
Adjust the programming file according to the placement effect after the first production test
If there is any issue of specification, direction and polarity, please follow process file to amend.
d. If the components are off, please adjust the file by following two methods
e. If the placement effects of all components are off in the same direction, it would be the fiducial
issues. Please resolve this issue by adjusting the coordinate of fiducials according to its value of
deviation.
f. If there are several components off beyond allowance, you’d better adjust their coordinates on
working file with downward-looking camera.
g. If there are couple of issues occur during test, some other points need to be considered.
h. Frequent pickup failure. Some suggestions are listed below,
The pick height is inappropriate, please revise the value after an inspection or a pick-test;
The pick offset needs an adjustment, it should be aligned with the center of component reel slot
rather than that of component.
Due to peel strength or installation issue of wasted film, the film on tape won’t be peeled
completely:
The nozzle was blocked
The nozzle is damaged or has a crack
The size issue of nozzle would cause air leakage or insufficient suction.
The air hose is blocked or has a leakage problem, and even the pump has an issue.
i. Frequently throwing components. Some suggestions are listed below,
upward-looking camera can’t take a clear picture of component due to brightness issue for example.