Xcavator
Operating Instructions
13
Reference the diagram above as you read the
description below.
The air pressure is regulated to 35 psi in the air regulator
and turned on and off in the air valve, then passes into the
brass manifold block where part of the air goes upward into
the top of the bead jar and presses downward on the beads.
The rest of the air travels to the left in the diagram and
gets mixed with beads in the bead injector. The combined
bead/airstream exits the brass manifold block at the left in
the diagram and travels via the black tubing to the wand
and finally out the tip where the mixture collides with the top
of the investment mold, removing the investment material.
The entire system, including the bead jar is pressurized to
35 psi. If any leaks occur, this reduces the velocity of the
beads and hence lowers the cutting force.
The two primary locations where leaks can develop
are in the two O-Ring seals.
Beads can worm their way
underneath the sealing surfaces, creating a path for air
to escape. (See O-Ring Seal #1 in the Jar Lid and O-Ring
Seal #2 in the wand in the diagram above)
The procedure for cleaning the O-Ring Seals is described
in detail in the Maintenance section of this manual.
Mold not Cut to Center –
Premature Cycle Termination
Press the Abort key to reinitialize the system, then
deliberately select a smaller ring size cycle (usually
100 gram) to finish the mold in progress. The most likely
cause is fluctuating or low volume flow of the vacuum
sensor during the run. Replacing the dust collector bag
is the best way to increase the vacuum air flow.
Oblong Cutting Inside Mold
The mold is not centered inside the chuck or the wrong
(too large) chuck is installed or a non-standard
ring-former was used.
jet Begins Cutting Too Far Inside The Mold
1. Wrong Cycle selected (TOO SMALL)
2. Internal synchronization lost –
Press Abort key to re-synchronize
3. Chuck assembly not seated over the
two index pins on the mounting plate
Troubleshooting
(continued)
Summary of Contents for Xcavator
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