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Parts & Service: 020 8988 7400 / E-mail: Parts@clarkeinternational.com or Service@clarkeinternational.com
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 (15), 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 dependant 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 page 24 which shows the
gear configuration and the explanation of how to change the gears on the
same page.
1. 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.
2. 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. Release the
Emergency Stop and switch ‘ON’ the speed control knob.
3. Turn the knob to achieve your desired spindle speed, and 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.
4. 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.
NOTE: If you require a shoulder with perfectly clean corners, then you need to
use an appropriately shaped tool.
5. Retract the tool one or two complete turns on the cross-slide feed, then
wind the saddle so that the tool is at the start point once again. Advance
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