Maintenance And Cleaning - Mestra T1 Manual Del Usuario

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9. When work is completed, move the slide on the fixed gun valve (B) fully back. Keep the
exhauster working for a few seconds to remove all dust particles from inside the booth.
10.Turn off the exhauster and open the booth lid to remove the workpiece.

MAINTENANCE AND CLEANING

To ensure a long service life for the unit, proceed as follows:
• Always use high-quality grinding medium. Talleres Mestraitua, S.L. recommends MESTRA
medium. The fixed micro-blasting gun (nozzle diameter 3 mm) can blow material with a
particle diameter of less than 300 micron. The moving micro-blasting module gun of T2 has a
nozzle diameter of 1.25 mm and can handle grinding medium up to 250 microns in diameter.
The T3 has a gun with a diameter of 1.25 mm, and the other gun has a diameter of 1 mm and
can handle grinding medium up to 150 microns in diameter. If grinding media with diameters
greater than 200 microns are used in the fixed gun, remove the filter at the end of the gun
tube in the booth.
• Use dry piston air compressors whenever possible. Oil particles in the blowing air can cause
lumps of sand which will clog the gun nozzles.
• The grinding medium discarded by the moving micro-blasting gun (T2, T3) can be used in the
fixed gun. However, never fill the micro-blasting module vessel with grinding medium from
the booth floor, since large-diameter particles may clog the nozzle of the moving gun.
• To prevent abrasion and wear on the inner booth walls, always point the jet at the rubber pad
on the rear wall when using the micro-blasting module (T2, T3).
• Stir up the grinding medium inside the booth periodically, and at the same time clean the filter
hood on the left-hand side of the booth.
• For an overall cleaning of the unit, use a dry cloth or moistened with a proper product.
If a moving gun (T2, T3) becomes clogged, remove the nozzle-holder nut with an M-12 fixed
wrench and remove the nozzle from inside. Unclog the nozzle with a pin or a thin wire, and refit
it on the moving gun.
If the fixed gun becomes clogged, unscrew the nozzle-holder manually and remove the blowing
nozzle from inside. Unclog with a pin or a thin wire, and refit.
The moving gun on the micro-blasting module T2 is factory-supplied with a 1.25 mm diameter
nozzle. However, 1 mm and 0.75 mm nozzles can also be fitted: consult your MESTRA dealer.
The moving guns on the micro-blasting modules T3 are factory-supplied with a 1.25 mm and 1
mm. diameter nozzle. The table below shows the grinding medium particle diameters for the
different nozzle diameters:
MAXIMUM PARTICLE DIAMETER
FOR EACH NOZZLE
Nozzle
1.25 mm
1 mm
0.75 mm
PRECAUTIONS
♦ Never exceed a pressure of 5 bars.
♦ Always work with the booth lid closed, and use suitable protective goggles and a face-mask.
10
Particle diameter
250 microns
150 microns
75 microns