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applied to Pattern X and Pattern Y at the start
of each Pattern Cycle in order to maintain the
correct pattern length and position even if the
product speed varies.
During each pattern cycle, a servo signal is
calculated based on product speed as sensed
by the speed tracker and the volume gain
selected by the operator. This signal is sent to
a servo controlled pump or servo controlled
fluid pressure regulator which raises and
lowers fluid pressure in direct proportion to the
signal.
Increases and decreases in pressure
increase and decrease the flow (volume) of
fluid.
This results in a constant deposit of
adhesive even if machine speed varies.
A
uto and manual operation may be selected
for the servo signal.
described. In manual, the servo signal is fixed
at a setting corresponding to the programmed
volume gain value, and will not vary as
machine speed varies.
Auto functions as just
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