Proxxon FF 500 Manual page 6

4.3 Assembling the collet chucks (Fig. 7 and 8):
You must disconnect the plug from the power socket to prevent unin-
tentional start-up! Risk of injuries!
• Never insert the collet chuck singly into the spindle receiver!
• Always engage the collet chuck in the swivel nut fi rst!
• Always make sure that the collet chuck and the milling shaft have
the matching diameter!
Please note: In addition to the supplied collet chucks, we have further
sizes available in our accessories range. Please contact our Customer
Service should you have any further questions. You will fi nd the postal
address at the back of these instructions, or simply write us an email
to technik@proxxon.com.
1. Release sleeve nut 4 (Fig. 7) at the milling spindle.
2. Place required collet 5 by hand in the sleeve nut 4 and let snap into
place by exerting slight axial pressure at the continuous groove.
Caution: The thinner end of the collet must point up, as shown in
the fi gure.
3. Insert sleeve nut 2 with the collet in spindle 1
(Fig. 7, see small illustration) and tighten lightly by hand.
4. Insert shaft of tool 3 in the collet.
5. Use the supplied wrench to tighten the sleeve nut, as shown in Fig. 7.
6. To remove the collet, release sleeve nut 4 and pull out tool 3.
7. Now remove the complete sleeve nut with collet out of the milling
spindle.
8. Apply slight side pressure to disengage and remove the collet.
4.4 Switching on the milling motor (Fig. 1)
Pressing the On/Off button at the top of the housing establishes ope-
rational readiness. Please ensure the motor switch at the front side of
the milling head is positioned at "0", otherwise the spindle will start
up after the On/Off button is pressed!
1. Press the On/Off switch 2. The operational readiness of the device
is signalled by the lit up speed display.
2. Press the motor switch 3 to switch on the drive
3. Select the correct speed with rotational speed adjusting knob
4. The current rotational speed will be displayed in the digital speed
display 5.
4.5 Changing the spindle speed
Setting the spindle speed is necessary to adapt the cutting speed of
the tool to the characteristics of the material to be machined and to
the tool geometry.
Large tool diameters at equal rotational speed also mean a large cir-
cumferential speed and thus potentially a large cutting speed. Con-
versely, the same is also true for small tool diameters. The speed can
be adjusted with the rotational speed adjusting knob and the current
value is shown on the digital display.
5 Milling
Always wear protective goggles during milling. Comply with the safety
regulations without fail!
- 12 -
Caution!
Caution!
Caution!
Caution!
The work piece to be processed must always be securely fastened
to the cross table! There are various possibilities available to you:
Clamping jaws (e.g. 24 257 from PROXXON), vices (e.g. 24 255 from
PROXXON) are very well suited. If divisions are to be manufactured, it
is possible to work with dividers or feed receivers, for example. You
will fi nd examples for clamping devices and accessories in our equip-
ment brochure, on the internet at www.proxxon.com, also together
with other valuable notes, in our "Manual for the Creative Modeller"
(Art. No. 28 996).
5.1 Setting the milling depth and milling procedure
Please observe the section "Height adjustment of the spindle". This
explains the methods used to set the height of the milling spindle for
the various application ranges.
In practise, after fi rst tightening the work piece and then roughly
clamping the milling cutter (approx. 2 mm above the work piece), ad-
just the spindle and then adjust the milling depth while you work.
You can work with either the handwheel or the drilling feed.
If the infeed (the dimension by which the milling cutter dips into the
work piece) should have a certain amount on the other hand, then this
can be achieved by using the scale ring of the handwheel as well as
the drilling feed.
Both can be "zeroised". To do so, for example and before (!) you
switch on the machine, position the milling cutter lightly on the work
piece (but without touching it!) and then adjust the respective scale
ring to zero. Please remember to release the screw for the scale ring
of the drilling feed as described in "Height adjustment of the spindle".
The scale ring of the handwheel is simply turned; so remember: the Z
carriage traverses by 2 mm per revolution.
This is how to proceed:
1. Securely fasten the work piece with clamping jaws, vice or chuck.
2. Roughly adjust the desired spindle height by handwheel 1 (Fig. 5).
To do so, Allen screw 3 must be open, but toggle screw 4 but must
tightened! If necessary, "zeroise" the scale rings as described in
the text above.
3. Make sure that the milling cutter does not touch the work piece.
4. Make sure that the correct spindle speed is set.
5. Select direction of rotation! (See below at "Feed").
6. If the milling depth will be varied during milling, then this works
best by using the handwheel 1 (Fig. 5). Here, Allen screw 3 is open,
toggle screw 4 is closed. If the milling depth will not be changed
after the adjustment (e.g. while face milling a work piece), we re
commend keeping both screws 3 and 4 closed.
7. Alternatively, you can regulate the milling depth with the drilling
lever 2 (Fig. 5). To do so, tighten Allen screw 3 when the carriage is
in the desired position. After actuating the drilling lever 2 to the
desired depth, the achieved position is locked by tightening toggle
screw 4 to clamp the quill. Drilling or counterboring work can be
carried out with this function.
8. Press the On/Off switch 2 (Fig. 1). The operational readiness of the
device is signalled by the lit up speed display. Press the motor
switch 3 to switch on the drive. Select the correct speed with the
rotational speed adjusting knob 4. The current rotational speed will
be displayed in the digital speed display 5.
9. Work with the adjusted feed
5.2 Feed:
During milling, make sure that the feed always occurs against the
cutting direction of the milling cutter (Fig. 9).