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To check to ensure the tip is at the correct height, position the tool so that the tip is
almost touching the point of the tailstock centre. They should coincide. If necessary
make adjustments using shims, grind down the
cutting tool tip or select another tool.
Mark the surface of the work at the point where
the cut is to end, i.e. the shoulder, using a scriber
or similar means, and move the saddle so that
the cutting tool is directly opposite the mark,
then wind in the cross-slide so that the tool
touches the surface of the work.
Whilst carrying out these manouvres, rotate the
chuck by hand to ensure that nothing will come
into contact with it when turning takes place,
i.e. there is adequate clearance between the saddle, cross-slide, tool post or cutting
tool, and the chuck.
It may be necessary to adjust the position of the cross slide or reposition the work in
the chuck to guarantee that there is adequate clearance.
When satisfied retract the cutting tool, by turning the Cross Sllide Feed Handle 'B',
and wind the Saddle away from the Headstock using the Saddle Feed Handle 'A',
then wind the cutting tool up to the work, somewhere along the length to be cut,
whilst rotating the work by hand, using the chuck.
Continue to advance the cutting tool slowly, until it just
touches the surface. Record this position by zeroing the
scale on the cross-slide, i.e. turn the moveable scale until
the zero marks coincide, (see diagram opposite).
Once zeroed, retract the cross-slide one complete turn,
then move the saddle until the tool is a short distance
from the right hand edge of the work.
Wind in the cross-slide again one full turn until the zero
marks again coincide.
IMPORTANT: If you go past the zero marks, back off again at least one half of a turn,
then slowly bring the marks back together.
14
FIG.6
FIG.7
FIG.8
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