Manual

7-18 Advanced Programming
28. Select Pass Block.
! The Start Pass instruction dialog box opens.
! This is the command that allows you to reuse the fiducial and height sense information
for each pass, rather than perform the operation each time.
29. Enter
2 in the Number of passes text box.
30. Click on
OK.
! The program lines should appear as follows:
1 START PASS: FOR PASS 1
2 END PASS:
3 START PASS: FOR PASS 2
4 END PASS:
5 END
31. Place the cursor on the first END PASS.
32. From the Program Commands toolbar, click on
Dispensing Elements.
! A Teach Window opens.
33. From the Dispensing Elements toolbar, click on
Find Substrate Height.
34. Use the Position controls to move the Dispensing Head to a location near the flip chip model.
! When you have actual parts placed on a workpiece, you do not want to teach the height of
the parts, but rather the height of the substrate onto which you will dispense. That is why
a location near the flip chip model is chosen.
35. Click on
Teach.
!
DO NOT click on Done. You do not have to exit this Teach Window yet.
36. From the Dispensing Elements toolbar, click on
Weight-Control Lines.
37. Enter
50 mg in the Total Weight text box and select Type 1 for the Line Style.
! This is the total weight to be dispensed at all locations where this pattern will be placed.
38. Use the Position Controls to move the Dispensing Head to the ULHC of the first flip chip
model in the top row of flip chip models.
! Use Chip Offset or reticles.
" NOTE Refer to “Chip Offset” earlier in this section.