Adjusting The System - Graco RTX5000 Operation, Parts

Operation

Adjusting the System

Sufficient fluid output (volume and pressure)
and good atomization is a balance of
atomizing air, material thickness/material
flow and nozzle selection. Achieving the
correct balance for your application requires
experimentation to achieve desired results.
Keep in mind these important points when
adjusting gun:
•
To select correct nozzle for your
applications, consider size of aggregate
in material and coarseness of spray
pattern. Remember the larger the
nozzle, the larger the pattern. See
Recommended Nozzle & Disc
Selection Charts, page 15.
•
Start sprayer with gun air control valve
completely open. If needed, slowly
close gun air control valve until you get
a good spray pattern. Use minimum
amount of air at spray gun to achieve
proper spray pattern and to minimize
bounce back.
+ Test spray pattern on cardboard.
Hold gun 18 to 30 in. (45.7 to 76.2 cm)
from surface. Use this spraying dis-
tance for most applications.
+ When spraying with a nozzle only
overlap each stroke 50% in a circular
motion.
+ When spraying with a nozzle and disc
overlap each stroke 50% in a linear
motion.
•
Material flow is controlled with the fluid
flow regulator knob and displayed on the
gauge. Gun air flow is regulated using
air control valve located on the gun han-
dle.
+ Opening air control valve increases
air flow through gun, which decreases
texture material flow through pump.
+ Closing air control valve decreases
air flow through gun, which increases
texture material flow through pump.
16
For Less Material Flow
Try one or a combination of these methods:
•
Open air control valve.
•
Turn gun flow adjustment nut to
decrease flow, counter-clockwise.
•
Use smaller nozzle.
For More Material Flow
Try any one or a combination of these
methods:
•
Close air control valve.
•
Turn gun flow adjustment nut clockwise
to increase flow.
•
Use thinner material mixture.
•
Use a larger nozzle.
Preventing Material Surge at Gun
Trigger
Pressure will build up in the system when you
stop triggering the gun. To prevent material
surge at initial gun triggering:
•
Point gun away from surface you are
spraying when you first pull trigger.
•
When you first start to spray, hold the
gun away from the surface and gradually
work your way closer to it.
•
Keep gun moving.
•
After you begin spraying, trigger the gun
as little as possible.
For Continuous Spraying
Use trigger lock to hold trigger open and
reduce fatigue.
Check Material Consistency
Periodically
Check and thin material as needed to
maintain proper consistency. The material
may thicken as it sits and slow down
production. Agitate periodically.
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