CRYSTAL MARK SWAM-BLASTER LV-1, Руководство по эксплуатации и техническому обслуживанию

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Section III Page 3
3.2 OPERATING PROCEDURES
A. THE CUTTING PROCESS.
The unit performs a cutting action by impinging sharp-edged powder particles
to a surface. A cylindrical powder/air stream emerges from the nozzle for a
short distance (approximately 1/16") and then diverges into a cone shape, with
a seven degree included angle. With a close nozzle tip distance small holes
and cuts with straight walls are made. As the nozzle moves away from the
work, the hole diameter or width of cut increases, with the walls becoming
angular. With a large nozzle tip distance, one wall can be kept normal to the
surface by holding or setting the nozzle at an angle. The angle can be
determined with a few trials.
To obtain sharp definition (as in precision cutting) the nozzle tip distance
should be kept to a minimum of 1/32".
B. CUTTING SPEED.
Cutting speed (removal of material) increases up to a certain nozzle tip
distance. Adjusting the powder flow, using different pressure settings,
powders and nozzle sizes and types, may also vary the cutting rate.
Etching or removing broad areas of metallized film or coatings can be
accomplished by increasing the nozzle tip distance and diverting the stream at
an acute angle.
C. ADJUSTMENT OF POWDER FLOW.
Depressing the Footswitch or Flow Test Switch causes a mixture of powder
and air to be discharged from the nozzle. The mixture richness is controlled by
the Powder Flow Knob, which adjusts the vibrator voltage.
CAUTION!!
The Powder Flow knob should be never be set too high. This will
cause audible striking of the pole pieces by the magnetic coil
armature. It will create an excessive amount of vibration that could
cause damage to the Unit.
D. PRESSURE BEHIND THE NOZZLE.
Air pressure settings vary depending on material being cut, type of cut of
abrading process desired and powder being used. A suggested starting point
is 80 psi (552 kPa).