Baumr-AG BMLAT-07 User Manual Download

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Mini Metal Lathe – BMLAT-07

E&OE

Operation

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 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 micrometres, callipers, 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 with the three socket head cap

screws in the manner shown in Fig. 6. (ideally, the

overhang should be approx. 10mm but not more than

15mm for a straight tool). It is IMPORTANT to ensure

that the tip of the cutting tool is on the horizontal centre line of the work, or very slightly below it. On no account

should it be above the centre line. When 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, take the tip is at the correct height, position the tool so that the tip coincides with the point of the

tailstock centre. If necessary, adjust 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 place or of small

diameter. Additionally, 'Steadies' or rests 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.

It may be necessary to adjust the position of the compound slide or reposition the work in the chuck to guarantee

that there is adequate clearance.

When satisfied, retract the cutting tool and crank the carriage/saddle away from the headstock, then crank the

cutting tool up to the work along the length to be cut while 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 carriage/saddle until the tool is a short

distance from the right-hand edge of the work. crank 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. Whenever you use the scale, as an indicator, to advance the cross-slide or

compound slide, ALWAYS use this procedure to align the marks. This is to take up any backlash or other

clearances in the gearing and slides etc. Continue to turn the handle an amount equivalent to your desired depth

of cut.

NOTE

: We recommend that for rough cutting, you do not exceed 0.010" (0.25mm) as your depth of cut.

The setup is now complete to begin your cutting operation, but, before starting, check the position of:

•

Auto feed lever. Ensure it is in the UP position for manual feed.

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