13
English
Troubleshooting
Symptom Cause Remedial action
No clay is extruded.
There is not enough clay.
Add clay until the case is lled with that clay.
The clay in the case is too soft. Since the clay is soft, add slightly hard clay.
The clay in the nozzle is hard. Remove the clay in the nozzle.
Rough-surfaced clay keeps
coming out of the extruding slot..
Dry clay is stuck in the end of the nozzle
(cylindrical part).
Clean the inside of the nozzle.
Clay is extruded as it rotates.
Clay is too soft.
Add some leather hard clay or open the
hopper cover for a while to help dry the clay.
Clay is not properly de-aired. De-air the clay.
The extruded clay has holes.
There is too much clay or the air remains in the
end of the nozzle (cylindrical part) because the
nozzle is clogged with clay.
Remove some clay.
Remove some clay from the nozzle.
The screw stops.The circuit
breaker trips.
Clay is hard during mixing. Add water to make the clay softer.
A large clay lump is caught between the screw
and the case.
Remove the clay lump.
There is too much clay. Remove some clay
The clay in the nozzle
becomes hard.
The clay in the nozzle is dried. Clean the nozzle by removing it.
The vacuum pressure is low.
The vacuum gauge reading
does not increase.
The vacuum gauge reading does not increase
even if the air inlet is covered with ngers.
→The tube comes o or the tube is torn.
Connect the tube or replace the tube.
The vacuum gauge reading increases if the
air inlet is covered with ngers.
→A)The gap between the hopper cover and the
barrel becomes larger.
→B)The lter is clogged.
A)Use wet cloth, or the like, to clean the
mating surfaces of the case and the
hopper cover.
B)Clean the lter.
Clay is not de-aired.
The air inlet is clogged with clay.
Before de-airing, clean the air inlet and
its peripheral area. If the air inlet is still
clogged with clay during mixing, there is
too much clay. Remove some clay.
De-airing time was too short. Extend the mixing time in vacuum.
Clay comes up to the vacuum
chamber.
There is too much clay.
Remove the vacuum chamber cover (acrylic
plate) and remove clay.
The vacuum pump is not
operating properly.
The hopper case is already vacuumed, preventing
the pump valve from being actuated.
The vacuum pump may stop working when
the hopper case is already vacuumed.
Open the pressure relief valve to pressurize
the hopper then start the operating the
vacuum.
The hopper cover will not
open even if the pressure
relief valve is opened.
The air inlet is clogged with clay, keeping the
hopper case vacuumed.
Insert a thin rod or the like from the nozzle
end to allow air to ow into the hopper
case.
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