DIAMOND PACIFIC Genie Посібник - Сторінка 8

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oscillatory manner so that its point of contact with the wheel spirals from

the edge of the stone to the center and back without stopping, since

stopping produces a flat spot.

This circular, oscillating motion is the key to well shaped stones and

the prevention of flat spots. Check the curvature of your stone

frequently to achieve symmetry. The outline should form a smooth arc

when viewed in any direction, with no high spots or flats, especially at

the top of the dome.

Once you have achieved a uniform shape, move to the finer grit

wheel and remove all the scratches left by the coarse wheel. It is

important to remove all scratches possible before proceeding to the

Nova Wheels.

Sanding and Polishing with the Nova Wheels:

Before using any Nova Wheel, make certain that the geyser is

supplying water to that

wheel. NOVA WHEELS MUST NOT BE USED

DRY.

Start with the 280 grit Nova Wheel, making certain that the geyser

is supplying water to that wheel. Use a firm pressure, depressing

the rubber backing so that it conforms to the surface of the cab, and

keep moving your stone with a circular and oscillating motion at all

times. This firm pressure (in contrast to the light to medium

pressure used on the grinding wheels) and the circular and

oscillating motion are important procedures in eliminating flat spots

and scratches. Using too light a pressure, or allowing the stone to

remain in one position, can result in more scratches and flat spots.

Spend enough time on the 280 grit Nova Wheel to completely sand

away the scratches and facets left by the grinding wheels. This

should only take a minute or two, leaving the stone with a uniform

finish over its entire surface and reduced to very near its final size.

3. Proceed to the 600 grit Nova Wheel, making certain that you move

the geyser first. Continue using firm pressure and the circular and

oscillating motion. You should only need to spend a minute or two

on each of the 600, 1200, and 3000 grit Nova Wheels to achieve a

fine polish on your stone.

It is important to do as good a job of sanding and polishing as

possible at each stage before going on to the next, as the finer grit

wheels take longer to remove scratches than do the coarser grit

wheels

5. Some hard to polish materials, such as Jade, may require a finer

grit polish than the 3000 grit Nova Wheel. A 14,000 grit Nova Disc

is provided with the machine and will generally give an excellent

polish. Other polishes such as cerium and tin oxide can also be

used with canvas or leather pads to provide the final polish.

Using Nova Discs:

For stones requiring an additional step to achieve a satisfactory

polish (jade and some soft stones, for instance), we recommend using

the 14,000 grit Nova Disc that comes with the machine. Other types of

fine polishing compound such as cerium and tin oxides also produce

excellent results, and canvas and leather pads are available for use with

these compounds.

Remove the end panel from the right side hood and thread the

Nova Disc into the 1/4-20 mounting hole in the right end of the

machine (see page 13).

2. Snap the small, white plastic, geyser base that came with your

machine onto the bottom of the brass geyser to angle it to spray on

the Nova Disc.

NOVA DISCS MUST NOT BE USED DRY.

3. To allow for working room when using the Nova Disc or other right

end attachment rotate the pan so that the front of the pan is on the

right end of the machine .

4. Additional Nova Discs are available in seven grits ranging from 280

to 50,000.