User Manual

Advanced Programming 9-1
9 Advanced Programming
Overview
This chapter discusses and demonstrates some of the more advanced techniques for
perfecting your dispensing programs. You will perform two underfill tutorials, one L-shaped
pattern and one U-shaped pattern. You will learn how to increase throughput by using timers
and skip marks and reusing fiducials and height sense information.
?NOTE You should complete the preceding chapter, “Beginning Programming”
before attempting the tutorials in this chapter.
Programming Tips
Below are several commonly used programming conventions that should help you perfect
your dispensing programs.
Order of Pattern Placement and Timers
The order that the patterns are dispensed is an important part of optimizing the whole
workpiece program.
For instance, in a U-shaped pattern, as shown in Figure 9-2, the first underfill line is
dispensed at all pattern locations on the workpiece. Then, the second underfill line is
dispensed at all pattern locations. Finally, the U-shaped seal pass is dispensed at all pattern
locations. Timers are set for each of these steps using the Reset Multipass Timer and Await
Multipass Timer commands in the Program Commands Toolbar. This technique is
demonstrated in the exercises later in this chapter.