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OTMT SC4 User Manual And Installation Manual page 28

Bench lathe
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X-Y Auto Feed Lever
Note: the following operation assumes that the
gear train is set up to the factory default
configuration. If the gear train has been
changed from the default, do not attempt this
exercise as the feed rate may be too fast for
safe operation.
Verify that the factory default gears are in
place and that the gears are engaged to turn
the leadscrew. If necessary, loosen the locking
bolt for the gear train assembly and swing the
gears to mesh with the spindle drive gear, then
lock the bolt.
Before making an actual facing cut, the
following procedure will familiarize you with the
power cross feed with the tool at a safe
distance away from the workpiece.
1. Move the carriage towards the tailstock
until the cutting tool is at least 6-8" away
from the end of the workpiece.
2. Press the green Start button. Confirm that
the leadscrew is rotating.
3. Set the rotational speed to about 600 RPM.
4. Move your hands clear of the cross-feed
handle as it will rotate under power in the
next step.
Caution: In the next step, be sure to move the
X-Y Auto Feed
downwards will cause the carriage to move to
the left. Move your hands clear of the cross-
feed handle as it will rotate under power.
Note: When engaging the power feed, it may
be necessary to apply light pressure to the X-Y
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Auto Feed lever for several seconds until the
leadscrew meshes with the power feed gear.
The lever should then drop into the engaged
position.
5. Push the handle of the X-Y Auto Feed lever
to the left, then rotate it upwards to
engage the power cross-feed. The cross-
feed
handwheel
clockwise and that the cross-slide should
be moving slowly away from the operator.
6. After the tip of the cutting tool has moved
across the center of the workpiece, push
the handle of the X-Y Auto Feed Lever to
the left, then rotate it downwards to the
center ("0") position to disengage the
power cross-feed.
7. Rotate the cross-slide handwheel manually
counterclockwise to move the cross-slide
back approximately to its starting position.
8. Repeat steps 5-7 a few times until you are
completely comfortable with the procedure
for using the power cross-feed.
9. Press the red Stop button.
Next we will repeat the power cross feed
procedure but this time actually making a
facing cut on the workpiece.
1. Use the carriage handwheel and cross-
feed lever to manually move the cutting tool
into proximity of the work, as you would to
take a facing cut.
2. Use a 4mm hex key to lock the carriage
lock.
3. Use the cross-slide handwheel and/or
compound handwheel to move the tip of
the tool until is just touching the face of the
workpiece.
4. Grasp the outer collar of the compound
handwheel and while holding the handle
steady, rotate the collar to set the dial to
zero.
5. Rotate
the
counterclockwise until the tip of the cutting
tool is clear of the face of the workpiece.
6. Press the green Start button. Confirm that
the leadscrew is rotating.
28
should
be
rotating
cross-slide
handwheel

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