Clarke MetalWorker CL300M, Инструкция по эксплуатации и обслуживанию, Страница: 15 / 32

15
OPERATION
A. SIMPLE TURNING
Before starting the machine, as described above, it is imperative that the setup for
the type of work to be carried out is
fully checked .
The following notes are guidelines as
to how to set up the lathe in order to
carry out a simple turning operation.
ALWAYS plan your work. Have
drawings or a plan on hand together
with any measuring instruments you
may require, such as micrometers/
verniers/calipers etc.
Select a cutting tool that will produce
the desired cut and mount it in the
Tool Rest, with as little overhang as
possible, securing it using three hex
socket head screws in the manner
shown in FIG. 6.
(Ideally, the overhang should be
approx. 10 mm but not more than
15mm for a straight tool).
It is IMPORTANT to ensure that the tip of the cutting tool is on the centre line of the
work, or very slightly below it. On no account should it be above the centre line.
Where necessary shims should be used beneath the tool in order to achieve the
correct height, or, if the tip is too high, the only recourse is to select another tool or
grind down the tip.
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.
When satisfied, mount the work, either in the chuck or on a faceplate, and if
necessary, use the tailstock centre for additional support (If the work cannot be
adequately secured by the chuck, or if it is a long piece, or of small diameter).
Additionally, ‘Steadies’ may be used which are described in greater detail under
‘Accessories’.
If the Tailstock is not to be used, you may remove it completely by slackening off
the securing nut at its base, and sliding it free of the bed.
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.
Fig 6