Clamping The Work Piece In The Lathe Chuck; Turning The Jaws Of The Lathe Chuck; Longitudinal Turning - Proxxon PD 230/E Manual Del Usuario

Clamping the work piece in the lathe
chuck
Important
If work pieces are clamped in the lathe chuck using the tail-
stock without a steady, the projection (Fig. 12) must not be
greater than three times the diameter of the material
(L = 3 x D).
The normal lathe chuck has three steel jaws, which are uni-
formly adjusted and centre round work pieces automatically.
In the normal position, work pieces can be clamped up to a
diameter of 35 mm. After turning the jaws, it is possible to
clamp up to a diameter of 68 mm.
1. Turn the lathe chuck 2 (Fig. 12) using the wrench 1 until
the work piece fits in the mount.
Important
Do not leave the wrench in the lathe chuck. Risk of injury.
2. Clamp the work piece tightly and remove the wrench from
the chuck.
3. Check the running of the work piece and correct if neces-
sary.
Important
Clamping a longer work piece which has been guided
through the spindle and is projecting to the left increases the
risk of injury. In this case, be particularly careful to ensure
that no objects are caught in the rotating shaft. Protect this
zone separately by fuse.

Turning the jaws of the lathe chuck

Important
Remove mains plug.
Important
Do not clamp work pieces with a diameter greater than
68 mm. The clamping force of the jaws is then too small and
the work piece may become loose. Danger of accident.
The jaws are numbered.
1. Open the lathe chuck until the jaws are released from the
chuck. This occurs in the sequence 3, 2 and 1.
2. Turn the jaws and first insert no. 3 in one of the three gui-
des (Fig. 13).
3. Press jaw no. 3 in the direction of the lathe chuck centre
and simultaneously turn the chuck wrench in the "clamp"
direction.
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Note:
Note:
4. When the thread worm 4 has gripped jaw no. 3, insert jaw
no. 2 into the next guide (clockwise).
5. Repeat procedure described above with nos. 2 and 1.
6. Then check that all jaws are in the central position.
7. If you want to work with the inside jaw chuck again, repeat
the steps described above in the reverse order, i.e. first
insert jaw nos. 1 and 2, and then 3.

Longitudinal turning

Turning parallel to the rotational axis and machining cylindrical
objects are the main uses of a lathe.
1. Select the spindle speed according to the table on your
lathe.
2. Adjust the required speed by shifting the belt in the drive
gearbox (see previous section).
3. Clamp a right side tool 2 (Fig. 14) in the tool holder (see
previous section).
4. Switch off the automatic feed 3.
5. Move the support from the right to the left of the work
piece.
6. Adjust the cutting depth using the cross-slide 1.
Important
Before switching on the machine, manually check whether
the spindle, chuck and work piece are running free.
Do not allow the support or turning tool to collide with the
lathe chuck.
7. Switch on the machine (clockwise rotation).
8. Manually feed or switch on the automatic feed 3, do not
overload the machine.
If the top slide is not necessary, it is advisable to clamp it with
the screw 4 (Fig. 14). The turning performance is improved by
eliminating play.
Note:
Note: