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13.
Figure 25.
Note: For most media blasting operations,
maintain a blast distance of six inches.
Maintain a blasting spray at a 45°-60° degree
angle from the workpiece so the media will
ricochet off and not directly impact the lamp or
viewing window. Doing this will help maintain
workpiece visibility and make the protective
viewing window film and media last longer.
Do not point the gun at the workpiece where
the tip is perpendicular or 90°degrees from
the surface.
Note: When media blasting thin materials
made of aluminum, copper, brass, wood, or
other delicate parts, select the correct media
and begin blasting at a low pressure, such as
45 PSI. Next, slowly increase the air pressure
until you achieve the finish required. When
using some types of glass bead media, you
may have to keep the operating pressure
between 50-80 PSI, or the media will break
down prematurely. Some media like silicon
carbide and aluminium oxide can withstand
pressures of up to 120 PSI on this machine;
however, most media blasting operations
should occur at 80 PSI.
Figure 25
ON/OFF
Note: If the gun or metering valve begins to
clog or becomes completely clogged during
use, cover the hole in the blast tip tightly,
and pull the gun trigger. Air pressure will be
then diverted back through the media suction
piping and usually blow out the clog.
If clogging still persists, it is likely that the
moisture or contamination ratio in the media
is too high, or there could be a loose fitting
or leak in a hose. Dry out the media, install a
moisture trap, screen or replace the media, or
check for leaking hose.
Only use high quality DRY media. DO NOT
use regular sand, and recognize when media
has broken down and is too fine or loaded up
with contaminants to work properly. Worn-out
media and contaminants will cause caking
and clogging.
If clogging persists, refer to Troubleshooting
on Page
30
for further solutions.
14.
Figure 26
Maintenance
Page 29
Figure 26.
15.
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