Barranca Diamond SUPER CABMAKER-GP8 - Manual (Page 14)

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NEEDLE VALVES
The three stainless needle valves (Fig 9) are for fine control of water to each of the three grinding
and polishing stations. For best results, close the valves to the stations not in use. To shut off flow to
a needle valve, simply turn the grey ribbed knob clockwise until it closes to a firm stop (do not over-
tighten). To open maximum flow to a needle valve, simply turn the grey ribbed knob counterclockwise
until the valve stops. It may take up to 30 seconds for water flow rate to change to a specific station.
Fig 9 - The three stainless needle
valves
Fig 10 - Drain with hose installed
DRAIN
A length of 3/8" ID tubing is provided with the GP-8 Super Cabmaker for drainage of excess water
from the front base of the reservoir where a drain is located at the base of the reservoir (Fig 10).
To drain off the excess build-up of cooling water on the diamond wheels and expandable drum belts,
connect length of 3/8" ID clear tubing to the drain and route it into a 5 gallon collection bucket or drain
for dirty water.
Do not recycle dirty water from the drain valves into a collection bucket for pumping back up to the
intake valve on the rear of the hood as the contaminants (rock grit, mud, slurry and abrasive particles)
will likely scratch the gemstone material being worked and possibly clog the stainless steel water con-
trol valves or submersible pump.
SUPER CABMAKER GP8 OPERATION AND ADJUSTMENT
DIAMOND WHEELS
The Diamond GP-8 Super Cabmaker comes equipped with two 8" OD x 1-1/2" brazed diamond
wheels in two diamond abrasive grit sizes (80 and 170 mesh or grit). Both wheels are manufactured to
a low tolerance OD circumference run-out for maximum wheel life and to prevent pounding and poor
performance during grinding. The high temperature brazed diamond bond provides excellent abrasive
performance when grinding the rough shape of the gemstone material. Diamond wheels must have an
uninterrupted flow of water during use for proper cooling and flushing of slurry and rock fragments.
A tool rest is attached to the reservoir base of the GP-8 Super Cabmaker in front of both the 80 and
170 grit diamond wheels (Fig 11). If a dop-stick is being used to hold the gemstone material, the user
can use the tool rest to securely hold the dop-stick while grinding, shaping and sanding. The tool rest