Barranca Diamond GP-6 Cabmaker - Manual (Page 16)

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tank. Also, don’t over force the gemstone material into the diamond wheel surface while grinding. Al-
low the diamond bond on the wheel to work smoothly with a constant and steady application of hand
pressure. Rotate your gemstone frequently while grinding to uniformly remove material, nicks and flat
spots while rounding and contouring.
Remember, satisfactory results are dependent on the user's skill and experience, as well as the gem-
stone and equipment being used.
Fig 19 - Carbide stick applied to dia-
mond wheel
Fig 20 - Resin belt installed and cen-
tered on expandable drum
Fig 21 - Polytex pad being applied to
the convex polishing disc
EXPANDABLE DRUM AND DIAMOND RESIN BELTS
The GP-6 Cabmaker comes with four diamond resin belts (6“ OD x 1-1/2" wide) in abrasive grit sizes:
400, 600, 1,200, and 3,000 (6 micron). These are to be placed over the edge and outer rim of the 6" x
1-1/2" rubber expandable drum (Fig 20).
Be sure to center the diamond resin belt so that the width of the belt fits completely over the width of
the rubber drum. Once the GP-6 Cabmaker is turned on, the rotation of the shaft and rubber drum
will cause the drum to expand outward, which will expand the rubber drum and tension the belt on the
drum. It is to be expected that the diamond resin belts will slide somewhat sideways while sanding or
polishing material. To safely and correctly use the belt, shut the unit off and reposition or realign the
belt over the drum and restart the unit.
Under no circumstances should the belts be used dry, as the build-up of heat from the grinding friction
with the gemstone material will cause the belts to wear out prematurely and possibly tear. Therefore,
keep a constant stream of water from the needle water control valve on the top of the hood (far left
valve) on at all times. Do not circulate dirty water from the reservoir tank or from a collection container
back into the water valves or else contaminant abrasive particles may scratch the gemstone. Always
pump from a clear and clean water reservoir to the diamond wheels and belts. For best results always
dry the gemstone material and check for scratches before proceeding to the next wheel or belt dia-
mond grit size. Do not skip belts in the four belt sequence (400, 600, 1,200, and 3,000 grit).
GP-6 CABMAKER OPERATION AND ADJUSTMENT