finetech FINEPLACER lambda - Loading the component for Placement; Alignment; Placement

FINEPLACER
®
lambda
Rev-Nr. 1.1
39
5.2 Loading the component for Placement
Align the component, lying e.g. face-down in a tray, with the placement head. Then
switch off the vacuum, lay down the arm, switch on the vacuum again and pick up
the component with the head.
See chapter 3.2.4, for information on vacuum control.
5.3 Alignment
1. Look at the screen of the vision system. Look at the bottom side of the
component. On the screen, all pads should be seen simultaneously. This
image will be superimposed on the image of the substrate. Seeing both, you
are able to compare the position of each pin of the component in relation to
their pad counterpart on the substrate.
2. Put your hands on the x and y micrometer screws (50) and (51) and use them
as handles for the positioning table.
3. Press the foot switch (64); the compressed air will be switched ON, lifting the
positioning table. Shift the air cushion supported positioning table (29) and
compare the images of component pins and substrate's pads; a coarse
overlapping can be quickly accomplished. The optional Target Finder AC1
helps to make this easier.
4. When overlapping has been achieved, release the foot switch and the
positioning table will be locked in the optical axis.
5. Look at two opposite chip contacts and their corresponding pads on the
substrate. At first, correct the angle deviation Θ (Theta), again using the
micrometers as handles to rotate the positioning table slightly around the
optical axis, without the air cushion. Ensure there is no dirt on the base plate,
because this might impair its positioning action.
6. Align the images of chip contacts and pads completely by adjusting the x and
y micrometer screws.
7. If necessary, repeat steps 6. and 7. until good alignment is achieved.
5.4 Placement
After successful alignment of both images, proceed as follows:
• Move the optics to the right end position. Gently swing down the placer arm.
• After placing only: Release the vacuum by actuating the foot switch so that
the component is released.