33
Move the nozzle to any place of PCB board, put one piece of carbon paper, then click
REMAINS(MARK), placement head will rotate and leave a dot, after that click the button of
Focus that dot and save,it will be done (show as photo above ).
Trash box position: setting the position of dropping component, it depends.
4.5. 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
1
Make a programming file
2
Test the file to pick and place components.
（
3
）
Inspection
1
Inspection Items
Check if the specification,direction,polarity of components are aligned with what they should be.
— Whether the components are damaged or the pins are distorted.
— Whether the component is off beyond allowance.
2
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.
3
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.
If the components are off, please adjust the file by following two methods
a.
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.
b.
If there are several components off beyond allowance, you’d better adjust their coordinates
on working file with down-looking camera.
If there are couple of issues occur during test, some other points need to be considered.
a.
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
