E&OE
© 2020 Baumr-AG
34
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 consider backlash and 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.
•
Forward/Neutral/Reverse leadscrew lever. If Auto feed is not required, set to 'Neutral'.
•
HIGH/LOW lever. Select required speed range.
Switch the machine ON as described under
and slowly feed the cutting tool into the work
using the Manual Feed Handle. Proceed until you reach the previously marked line on the work, then retract the
tool one or two complete turns on the Cross-Slide feed handle.
Wind the saddle back to the beginning, then wind the tool the same number of turns 'in', plus the depth of
desired cut, and proceed to cut once more.
NOTE
: This describes the procedure for general, rough cutting. For other types of cuts - finishing, cutting
shoulders etc., you should consult a suitable handbook.
Simple Turning with Power Feed
The same basic setup is used as described above, except that, before starting, the Leadscrew F/N/R Lever (25)
is set to the 'Forward' position and the Auto Feed Lever (13), is operated in order to drive the saddle.
As mentioned previously, the rotational speed of the leadscrew, and hence the rate of feed of the tool, is
dependent upon the gear configuration of the gear train.
The feed rate for normal turning is considerably less than that used for screw cutting.
The lathe is factory-configured for normal turning, however, if you have been screw cutting, always remember to
reset the gear configuration to that for normal turning.
Please refer to the chart on later pages which shows the gear configuration, and the explanation of how to
change the gears on the same page.
19. Taking all precautions previously mentioned, position the cutting tool a short distance to the right of the
workpiece with the appropriate depth of cut set on the cross-slide.
20. Ensure the leadscrew F/N/R lever is set to 'Forward' and select 'Forward on the Forward/Off/Reverse switch
on the main control panel. Switch on the machine.
21. Turn the knob to achieve your desired spindle speed with your right hand, push down on the auto feed lever
until the nut becomes firmly engaged with the leadscrew.
IMPORTANT
: Your left hand should always be free in order to hit the emergency stop should it become
necessary.
22. Carefully observe the movement of the tool and as it approaches the mark on the surface, denoting the end
of cut, pull the Auto Lever UP sharply and ensure it stays UP. If a degree of accuracy is required, it is
recommended that you finish the cut by hand.
