- 21 -
S
et the belt transmission to the correct speed (note table on
gearbox and Fig. 6).
Disengage the leadscrew (leadscrew switch 2 (Fig. 2) to left) and
engage the support (lever 3 (Fig. 3) downwards).
N
ow move the support from the right to the left close to the work-
p
iece (handwheel 10 (Fig. 1)).
Before switching on the machine, check that the chuck moves
freely by twisting the chuck by hand.
Switch on the machine (direction switch 1 (Fig. 2) to right).
S
et the cutting depth by moving the cross-slide (handwheel 5
(Fig. 3)). It is best to start with a cutting depth of 1/10 mm
(4 graduations on the scale).
Now move the support in the working direction by turning the
handwheel 10 (Fig. 1) at the rear. If all settings are correct, the
m
achine works smoothly and without excessive loading.
Important
Risk of injury. When turning, always keep your fingers away from
the rotating workpiece. Never measure the workpiece with a cal-
l
iper gauge or a similar tool when the machine is running. Do not
apply a file or emery cloth to the workpiece when the machine is
running.
Taper turning
To turn tapers, the top slide is adjusted according to the desired
angle.
1. Move top slide to the right with handwheel 1 (Fig. 11).
2. Loosen clamping screws 2.
3. Adjust the angle of the top slide and re-tighten the screws.
Note:
The top slide is equipped with a vernier scale (similar to a calliper
gauge). The correct angles are indicated on the outer scale A
(Fig. 11a). On the inner scale B, they are compressed (1 gradua-
tion on the inner scale corresponds to 4.5°). The angle can be
read in 5° stages by aligning the zero mark of the inner scale with
the outer scale. If you wish to add 1°, the “2” on the inner scale
must be aligned 10° further outwards on the outer scale. For 2°,
the “4” must be aligned 20° further outwards etc. In this example,
the “2” is aligned with the “20”, or 10° further outwards than the
basic value of 10°. This produces an angle of 10°+1°=11°.
4. Clamp support with screw 3 (Fig. 11).
5. The feed is advanced via the handwheel of top slide 1.
Note:
A precise taper is only achieved when the height of the
turning tool is adjusted exactly to the centre position.
Grooving and parting off a workpiece
Grooving designates the production of fine grooves. If the groove
is continued to the middle of the workpiece, this is called parting
off. Ensure that the height of the parting-off tool is adjusted to the
centre of the workpiece and clamp the tool as short as possible.
Use a small turning tool and lubricate the tool with a little machine
oil if possible.
Machining longer work pieces with tail-
stock and centre
Longer workpieces (chuck projection greater than 3 times the
workpiece diameter) must be held at the right hand end by the
t
ailstock and the travelling centrepoint. For this purpose,
p
rovide a centrebore on the right hand face:
1
. Turn the face of the right hand end carefully.
2. Insert chuck 1 (Fig. 12) in the tailstock and clamp a centring
bit.
3
. Move the tailstock to the workpiece and fasten with clamping
screw 2.
4. Switch on the machine and make the centrebore using the
sleeve feed (handwheel 4).
You can then replace the chuck with the travelling centrepoint.
G
uide the point into the centrebore and close down carefully until
any play is eliminated. Then fasten the sleeve with tommy screw
3.
Changing the feed
Danger!
Always disconnect the mains plug for all adjustment and mainte-
nance work! Risk of serious injuries or damage due to inadvertent
starting up of the device, or hazard due to electric shock!
In the standard version, the PD 400 is supplied with a feed of
0.07 mm/rev. To use a faster feed (0.14 mm/rev.), the gear-
wheel of shaft Z1 (Fig. 13) with 20 teeth must be replaced by
the gearwheel with 40 teeth in the gearbox. For this purpose,
please proceed as follows:
1. Switch off the machine at the main switch 25 (Fig. 1) and
open the gearbox 23.
2. Loosen screw 1 (Fig. 13) slightly and tilt wheel arm 2 down-
wards.
3. Remove clip 3.
4. Loosen shaft 4 at the square section by half a turn. Replace
the gearwheel 5 with 20 teeth by one with 40 teeth.
Note:
When changing the gearwheels, always place a strip of news-
paper between the tooth flanks before tightening the shafts.
The thickness of the paper strip should correspond to the
required tooth flank play.
5. Re-tighten the shaft, push on the clip, fold up the wheel arm
and re-tighten screw 1.
Mounting change gears for thread
cutting (Fig. 13)
The PD 400 can turn 19 different metric threads (see table in the
gear case and Fig. 25) and 14 inch threads of 10 to 48 turns. To
adjust the thread pitches, the change gears need to be combined
in a certain order. For this - and as described above - the fasten-
ing clips in axis are firstly pushed off. Then the cog wheel combi-
nations are mounted in the gear case in accordance with the
table.
To Next Page
Loading...
