17
308-105
Spray
Tip Selection
Other Applications
Sport
Court,
2” wide line
1
15, 1
17
Crosswalk,
12” wide line, 1 gun
621,
623, 625
Airport,
24” wide line, two guns
721
Stencils
417*, 419*
General Stationary
Painting 517
Fig.
12
Lineal
Feet/Minute
(rate at which unit is moved)
Based on 4” wide line and 15 mils of paint
Application 120 144 184 220 264 308 352 400
Parking Lot Lines
4” wide
217 LLT–319* 221* 223 224
6” wide
317 319* 321* 323 325
Long Lines,
4–6” wide
221* 223 225 227 228 231
Curbs 417* 419*
*
T
ips can be
used with two guns.
Supplied with the Line Lazer
.
Spray Tip Application Recommendations
Spray
T
echniques
These spray techniques discuss how to use and adjust
the
features of the
Line Lazer
. Y
ou must also consider op
-
erator
technique, job site conditions and weather
.
1. Use
water rather than paint to
practice spraying tech
-
nique
and positioning the guns.
2. Be sure the RAC IV Tip Guard is always parallel to
the
ground
and the “wings” of the spray tip guard face
the
front and back of the unit, as shown in Fig. 13.
WARNING
To
reduce
the risk of a fluid injection injury
, always dis
-
engage
the remote trigger cable to the gun(s) and en
-
gage
the gun trigger safety latch(s) before moving or
adjusting
the spray tip guards, guns or gun arms. See
page
22.
3. Use the lowest pressure necessary for good atom-
ization. High pressure may cause excessive paint
buildup
and overspray
.
4. Start
moving the Line Lazer before triggering the gun
to
prevent a build up of paint at the beginning of the
line. Release the trigger a second before stopping
the
Line Lazer. Move at an even rate of speed.
5. Always
check your gun adjustments on cardboard or
paper before starting each job. When painting curbs,
paint
first in an area that is less frequently seen.
6. Keep in mind that many factors af fect the straight-
ness of a line, including uneven surfaces, potholes,
rocks
and other debris and a clogged or worn
spray
tip.
See page 16 for how to clear or change a spray
tip.
7. To
minimize the ef
fect of bumps on the spray pattern,
keep the spray tip guard centered with the front
wheel
axis.
8. The
spray tip size and the rate at which you move the
unit
af
fect the
coating thickness. Generally
, the fast
-
er you move the unit, the larger the spray tip orifice
should
be.
The fan width of the spray tip indicates ap
-
proximately how wide the line will be. See the chart
in
Fig. 12
for spray tip application recommendations.
9. Position
the guns to suit your requirements. See the
section
below and pages 18 to 20.
10. Traffic
paints
may be formulated for air spray
, airless
spray or have no formulation description.Generally,
air
spray formulas are pre–thinned, and will work
well
in
the Line Lazer
, but there may be more overspray
.
Non–air spray formulas tend to deliver more lineal
feet
of line per gallon with less overspray
, since they
are
less easily absorbed into the pavement.
11. If
you use fast–draying traf
fic paint on a hot day
, float
compatible
solvent on top of the paint to prevent skin
from
forming on it.
Line Width Adjustment
Several factors affect line width: vertical distance of the
spray
tip to the spraying surface, spray tip fan pattern,
us
-
ing one or two guns, paint pressure, and a worn or
clogged
spray tip.
The typical conditions for a 4 in. wide line are: 319 size
Line Lazer T ip (supplied), the gun positioned one inch
from the lowest vertical position, and just enough pres-
sure to atomize the paint. Depending on the fan pattern
of
the spray tip, use one
gun to paint 2 to 12 in. wide lines,
and
two guns to paint 12 to 24 in. wide lines.
To
decrease line width
, lower the gun (if
possible) or use
a
tip with a narrower fan pattern.
To increase line width, raise the gun, or use a tip with a
wider
fan pattern, or use two guns.
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