Spraying Systems Co 1550+ AutoJet, Руководство пользователя

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Using the Recirculation Feature
Recirculation
The 1550+ AutoJet Modular Spray System is designed to recirculate fluid in two methods. Re-circulating the fluid from the
system to the supply tank allows the customer to keep the fluid in a state of motion. This is very useful when spraying
fluids that need agitation to keep the viscosity constant.
Re-circulating the fluid from the spray nozzle to the system allows the customer to keep fluid pressure constant and
eliminate pulsing from the pump. Depending on the position of the return point, it will also allow the customer to keep
fluid in motion through the spray nozzles, again helping to keep the fluid at a constant viscosity. This should help prevent
spray nozzle clogging and keeps the material from separating.
Each of these recirculation modes are described below.

The first method is to re-circulate the fluid out to the spray nozzle and back into the system through the second
liquid port. (Ex. Nozzles of headers that have this feature include AA250AUH, VAU and VMAU, 98250 product
lines)
Duty Cycle Example 2
The example shown at left has the parameters set as follows:
1 second
start delay time
3 seconds spray period time
33% PWM or Duty Cycle
Set to
Fixed Spray Time timing mode

This works in the application by the system receiving the sensor or
trigger signal, the system is activated; the start delay time is
activated, then after 1 second time the spray nozzle is activated.

It sprays for 3 seconds of spray period time.

During that 3 second spray time the electric spray nozzle is pulsed,
at a 33% rate so that of the 3 seconds of spray time the spray
nozzle is spraying only a third of the time or 1 second’s worth of
total time.

The system thereby theoretically cuts the liquid flow rate for the
application by two thirds.
Duty Cycle Example 1
The example shown at left has the parameters set as follows:
1 second of start delay time
2 seconds of spray period time
100% PWM or Duty Cycle
Set to Fixed Spray Time timing mode
In this set of parameters PWM is not actually being used.
Note: For all pneumatic or non-electrically actuated spray nozzles the
PWM should always be set at 100%

This works in the application by the system receiving the sensor or
trigger signal, the system is activated; the start delay time is
activated, then after 1 second time the spray nozzle is activated.
 It sprays for the 2 second spray period time.

During that 2 second spray period time the electric spray nozzle is
not pulsed; the spray nozzle is spraying for the total 2 seconds of
spray time.