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Helpful Hints
The marking quality of all AirGrit machines depends
critically on providing a "blast" of air very quickly. In order
for your air system to provide this, the air line leading up to the AirGrit
must be as large and unrestricted as possible. Always use the air line
size specified in your AirGrit instruction manual. Quick disconnect fittings
or other restrictions to the air flow will produce inferior marking. Also
be sure to use only the high flow air filter supplied with your system.
When the grit becomes moist, it tends to clump together.
This clumping will clog the machine or greatly reduce the quality of the
mark. Many AirGrit machines come with a heater that is designed to remove
as much moisture as possible from the grit. Moisture can also enter the
unit through the air line. Make sure the airline to the unit includes
the proper filter, which will remove much of this moisture. Again, be
very careful to use the filter recommended for your system, because it
has been chosen also for its high air flow capacity (so not to impede
the air "blast" as described in the hint above).
Our AirGrit instruction manuals all recommend that the
grit be changed regularly. Over time, the grit breaks down and loses its
ability to make a mark. Therefore, when your markings become faint you
should REMOVE the old grit and replace it with new Matthews grit. All
of our AirGrit machines have been designed and tested to work with Matthews
#180 grit. Use of other grits with varying specifications has been shown
to produce inferior results.
Obviously, in order to make the best mark the Grit Nozzle
inside your machine must hit the proper area on the rubber mask. Misalignment
of the nozzle can result in uneven marking. Refer to your instruction
manual for directions on how to use the Nozzle Alignment Tool to correct
any problems.
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