Manual

Advanced Programming 7-15
Chip Offset
Chip Offset is the distance between the edge of the part (usually a die) and the edge of the dispensing
needle and is primarily used for underfill applications. It is defined to ensure that the needle does not chip
the die edge during dispensing. The Chip Offset is used in the X-axis and the Y-axis as shown in Figure
7-11. A formula is used to calculate the Chip Offset:
Chip Offset = ½d
n
+ 7 mil
where d
n
is the outer diameter of the needle
Reticles can also be used to provide the Chip Offset. Using reticles while programming can often be
easier and quicker to use than the Chip Offset formula. Refer to “Vision Setup” in the System
Configuration and Setup section for instructions on how to use reticles.
Item Description
1 Needle Tip
2 ½ Needle Diameter + 7 mils from Corner in X and Y-axes
3 Chip
4 Chip Offset Perimeter
Figure 7-11 Chip Offset
" NOTE Refer to Exercise 7-2 for step-by-step instructions on programming an underfill
workpiece using the features described in this section.
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