Owner's manual

Advanced Programming 7-11
7.4 Editing a Pattern
1. Make sure the name of the pattern you wish to edit appears in the Pattern Name text box.
 If not, click on the arrow next to the Pattern Name text box and select the pattern from
the drop-down menu. See Figure 7-9.
Figure 7-9 Opening a Pattern
2. Edit the program as described in 6.8 Program Editing.
7.4.1 Multipass Patterns
A multipass pattern is a pattern that reuses one set of fiducials to repeat the same pattern at one or more
locations on the workpiece. This is a helpful feature when an application requires multiple dispenses or
requires a "seal run" after adhesion. One big advantage of multipass patterns is that once the substrate
height has been found and the fiducials defined, the information is reused for all of the passes, which can
greatly increase throughput.
For example, the workpiece shown in Figure 7-10 contains eight identical rectangle-shaped chips:
Figure 7-10 Multipass Workpiece
Assume you want to perform the following dispensing functions:
• Perform a height sense on each chip.
• Dispense an L-shaped weight control line.
• Dispense an L-shaped seal pass.
It is much faster to perform all the height sense operations, dispense the first fluid and then come back
and dispense the sealant for each chip than to perform all three operations on a chip before moving to the
next chip.
There are several commands associated with multipass patterns:
• Loop Block
• Pass Block
• Multipass Timer commands
Loop Block and Pass Block commands are accessed from the
Pattern drop-down menu. Multipass
commands are accessed from the
Timer drop-down menu.