Sanding And Finishing; Bowl Turning - Jet 4224 Gebrauchsanleitung

Turn the workpiece by hand to see if it
rests securely between centres and
can be rotated freely.
Fig 10
For turning between centres the tool
rest is set appr. 3mm higher than
centre line (Fig 10 and 11).
Fig 11

6.5 Bowl turning

Turn outside of bowl between centres.
Turn a short tenon the size of the hole
in the faceplate (A, Fig 12). This will
allow centring the workpiece.
Fig 12
Mount the workpiece (A, Fig 13)
directly to the face plate using 4 wood
screws (C) from the back. Be careful
to use screws short enough not to
interfere with the cutting process but
long enough to hold the workpiece
securely to the face plate.
If screw mounting is not allowed at all,
the work may be glued to a backing
block (D) and the backing block
screwed to the face plate. A piece of
paper in the glue joint will prevent
damaging the wood when separated
later.
Mount the face plate with the
workpiece already attached onto the
spindle nose thread and hand tighten.
Move tailstock away, remove centre
from tailstock to prevent injury.
Turn the workpiece by hand to see if it
rests securely and can be rotated
freely.
Fig 13
For face plate turning the tool rest is
set slightly lower than centreline.
Caution:
Cut with your chisel on the left side of
the turning centre only.
Use left hand to control cutting edge
of gouge, while right hand swings tool
handle around toward your body (Fig
14).
Fig 14
Try to make one, very light continuous
movement from the rim to the bottom
of the bowl to ensure a clean,
sweeping curve through the
workpiece.
Move tool support to the exterior to re-
define bottom of bowl.
7

6.6 Sanding and Finishing

Remove the toolrest and begin with a
fine grit sandpaper (120 grit) and
progress through each grit, using only
light pressure.
Use power sanding techniques to
avoid concentric sanding marks.
Finish sanding with 220 grit.
Apply first coat of finish. Allow to dry
before sanding again with 320 or 400
grit sandpaper.
Turn lathe back on and make a
separation cut through the base. Stop
at about dia. 80mm and use a fine
tooth saw to separate the bowl from
the waste.
Apply additional finish coats and allow
to dry before buffing.
7. Setup and adjustments
General note:
Setup and adjustment work may
only be carried out after the
machine is protected against
accidental starting by pulling the
mains plug.
7.1 Changing speed range
Disconnect the machine from the
power source!
Loosen the locking screw and open
the belt cover.
Loosen the locking handle .
Lift up on the tensioning handle to
remove tension from the poly v-belt.
You can now position the belt in the
desired speed range.
Note:
The "High" speed range (0-3500)
provides maximum speed, where as
the "Low" speed range (0-910) will
provide maximum torque.
Lower the tensioning handle so that
the weight of the motor provides the
needed tension and tighten the locking
handle.
Close and lock the belt cover.
Warning:
The AC Inverter does not require any
programming. It is pre-programmed
from the factory. The buttons and
knob on the face of inverter should not
be changed.