Setting The Spindle Speeds (Fig. 10); Shifting The Drive Belt; Electronic Speed Control; Working With The Machine (Fig. 11) - Proxxon FD 150/E Manuel D'utilisation

For that reason, we have equipped our lathes with an electronic
speed control as well as a two-stage belt drive.
This covers the rotational speed range from 800 up to 5000 rev-
olutions.

Setting the spindle speeds (Fig. 10)

Shifting the drive belt

You absolutely must disconnect the mains plug before working
in the gear case. Risk of injury!
1. Loosen the knurled screw 1 at the headstock and swing open
the cover 2.
2. Loosen the Allen screw from the belt tightener 3.
3. Preselect the corresponding speed by shifting the drive belt
4. Please make sure the drive belt is seated correctly on the
belt pulley!
4. Lightly press the tension jack 3 in the long slot 5 against the
belt drive and then retighten the Allen screw. Ensure suitable
belt tension. Too much tension increases wear to the belt and
bearings and greatly slows down the motor.
5. Before starting work, close the gear case and retighten the
knurled screw 1.

Electronic speed control

In addition to the selection of gearbox stages by means of shift-
ing the drive belt, your machine also offers you the possibility
to electronically adapt the rotational speed to the respective con-
ditions.
1. Turn the rotational speed regulating knob Item 6 (Fig. 10) to
the left or right to set the rotational speed during operation.

Working with the machine (Fig. 11):

Before inserting the mains plug, please check if the information
on the rating plate matches the local conditions of your mains
supply. If they do not match, then damage or hazards during
work could be result!
Always wear hearing protection and protective goggles while
working!
Avoid abnormal body posture! Make sure you stand securely and
can keep your balance.
Only work with a folded down chuck guard! If the guard is de-
fective, the machine may no longer be operated!
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Caution!
Caution!
Caution!
Caution!
Caution!

Example of straight turning (a)

Turning parallel to the rotary axis and machining cylindrical ob-
jects are the main applications of a lathe.
1. Clamp the workpiece as described in the chapter "Clamping
the workpiece".
2. Make sure that the workpiece can be turned freely.
3. Set the necessary rotational speed by shifting the belts in the
gear case (see previous section). Caution: Turn the rota-
tional speed regulating knob to the left before switching on.
4. Clamp the appropriate tool in the tool holder (see "Clamp-
ing the cutting tool").
5. Move the support to the workpiece from right to left.
6. Set the cutting depth with the cross slide 1.
7. Move the cross slide and upper carriage up to the work-
piece.
8. Switch on the machine using the master switch. Caution:
Make sure that the chuck guard is folded down.
9. Traverse the cross slide and upper carriage by turning the
handwheels. Caution: Do not let the carriage or cutting tool
run against the lathe chuck!
10. When you have completed your work, use the master switch
to shut off the machine.

Example of face turning (b)

This operating method is used to face turn the face side of a
workpiece. To do so, proceed in the manner of the previously de-
scribed straight turning with the following particularities:
1. Clamp the right cutter adjusted by approx. 2° to 3°. The an-
gle adjustment must be set by swivelling the tool holder.
2. Move the cross slide with cutting tool from the outside to the
inside (towards the centre) while machining the right face or
shaft shoulders.
For larger workpiece diameters, the cutting speed from the out-
side to the inside differs rather considerably. Therefore, infeed
the cutting tool with the cross slide slowly and with sensitivity!

Example of taper turning (c)

The upper carriage is equipped with a scale and can be swivelled
to two sides by 45° for taper turning. To do so, proceed as de-
scribed at "Working with the upper carriage". The method of ma-
chining is the same as for straight turning.
Note:
Note:
Caution!