Grizzly G0708 - Basic Operation

-22-
Model G0708 (Mfd. Since 1/15)
Basic Operation
This section details the correct order of operations
for using the Model G0708.
To use the blast cabinet:
1.
Conduct the daily check listed in Maintenance
on Page 29.
2.
Prepare the workpiece as discussed in Pre-
Use Overview on Page 20.
3.
PUT ON safety goggles and a respirator.
4.
Select and load the blasting media through
one of the doors. Never load media that
contains free silica, as this is a leading cause
of silicosis. Refer to Page 25 for media
types.
Note: Loading just enough media for the job at
hand will help you prevent over-using or having
to screen excess media. Typically use enough
media to cover the metering valve opening by
6" Keep the metering valve adjusted properly
for the type of media blasting being done and
the media being used.
Note: If the metering valve screw (Figure 18)
is turned clockwise and restricts the vents too
much, the gun will pulsate and a low-velocity
rich-media spray will result. If the metering
valve screw is turned counterclockwise too
far, opening the vents too much, the gun will
be noisy and a lean media spray will result.
Under both conditions, low productivity is the
ultimate outcome. Trial-and-error is the best
way to sort out your adjustments for the type
of media and blasting to be done.
5.
Install the correct tip into the blast gun, in the
order shown (Figure 19). For lower air use
the 6mm tip is used most often. Refer to Page
25 for air pressure and media options.
Figure 18. Metering valve.
Metering Valve Adjustment
Vent Hole
Figure 19. Blast tip installation.
Figure 20. Dust collector dump chute.
Note: It is very important to maintain
concentricity of the tip orifice as it wears. To
do this you must rotate the media blasting tip
1
⁄4-turn every 10 to 12 hours of use. Worn tips
make an inconsistent media spray pattern. As
a result, surfaces can be left with streaking
or spots of tear-out. Replace any tip that has
worn
1
⁄16" in diameter larger than its original
size.
6.
Empty the dust collector canister periodically
during long blasting operations and after every
use. Every five hours of blasting operations,
clean the canister filter using compressed air
(Figure 20).
Blast Tip