Operating instructions

Transition
Figure 4. 2- Delays and durations
A - Delay (Off)
B - Duration (On)
1 - Gun
2 - Trigger
3 - Transition sequence
4 - Line travel direction
C N Ot ds on Co rporation 1 993
AI R1g hts Res erved
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Operating Instructions 4-5
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Definition:
A change from one in.terval to the other: either a change from a delay to
a duration or from a duration to a delay. The combination of delays and
durations makes up a transition sequence (Figure 4.2).
2
Q
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0
3
A
-
-
~B~
..----4- --
Decision Factors:
• number of transitions - dependent upon number of delays and
durations
• delays - lengths of spaces between beads
• durations - material bead lengths
• transition set-points - cumulative sum of delay and duration values
The placement
of every bead of material on the substrate requires at
least two time intervals to be completed: one delay (gun off) followed
by
one duration (gun on).
NOTE: Nordson timers commonly use the first pattern interval as a
delay. In Figure 4.2, the pattern consists
of a delay, a duration, a
second delay, and a second duration. Each new pattern starts with the
first delay interval.
The
PC40 allows you to program from one to four delays and from one
to four durations.
PI N 1 08 389A
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