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the housing on the scale (no. 12 - Fig.
8). If this is not the case, adjust the va-
lue accordingly with the hand wheel
(no. 11).
7. By turning the hand wheel (no. 21 - Fig.
12), set the horizontal path of the mil-
ling unit in such a way that the position
indicator shows at least the width of the
workpiece. We recommend to add a sa-
fety margin of some mm to this value.
8. Press the pushbutton "Z-" to return the
milling unit to the lower end position.
Then, set the operating mode selection
switch (no. 7 - Fig. 5) to position "4" and
close the lid of the machine housing.
9. For flattenings, loosen the handle lever
(no.27 - Fig. 15) and set the double
stop plate in such a way that the pointer
(no. 28) points to the finished timber
length without flattening length "t" on
the scale (no. 29) (see Fig. 7). Re-tigh-
ten the handle lever. Lay the workpiece
against the contact edge of the workpie-
ce support and insert it into the slide-in
opening until it hits the front shutter of
the double stop plate. Then, fix the
workpiece with the screw clamp (no. 26
- Fig. 14).
Per work step, the blade length
"t" can be max. 110mm (4 3/8 in.).
For longer blades, machining
must be divided into several
steps. (The rear shutter of the
double stop plate may possibly
be used).
10. Press the Start pushbutton (no. 8 - Fig.
5). The protection curtain closes. The
milling head automatically follows the
preset flattening contour. After comple-
tion of the cycle, the milling motor re-
turns to home position and is switched
off. The protection curtain opens auto-
matically.
11. Lay the marked workpiece against the
contact edge of the workpiece support
and insert it into the slide-in opening
until the mark "t" is aligned with the 0
position (corresponds to the line pro-
jection of the laser). Observe the maxi-
mum machining length of 110 mm (4
3/8 in.) per work step. Now, fix the
workpiece with the screw clamp (no.
26 - Fig. 14).
3.9 Feed control
The ZAF 250 Vario has the option to redu-
ce the feed rate of the feed motors to 50%
of the regular rate.
To select this setting, turn the potentiome-
ter on the top left of the control panel.
4
Tooling and maintenance
Before starting to do any mainte-
nance work, either switch off the
main switch and protect it against
accidental re-activation, or dis-
connect the power plug!
4.1 Tool change
The milling tool delivered with the tenon
cutting machine has been developed spe-
cifically for this machine. It consists of the
cutter head (no. 37 - Fig. 18) and the cut-
ter ring (no. 38) fitted with replaceable hard
metal reversible knifes. This eliminates the
need for labour- and time-intensive sharpe-
ning of the tool: When the hard metal re-
versible knifes are dull, they only require
reversing or replacing. Proceed as follows:
1. Check whether the indicator (no. 13 -
Fig. 9) points to the value "0" at the indi-
cator scale (no. 14) at the segment for
tilting. If this is not the case, loosen the
handle lever (no. 15) to correct the posi-
tion of the segment for tilting
accordingly.
Never tilt the milling unit with the
protection curtain closed!
2. Set the operating mode selection switch
(no. 7 - Fig. 5) to position "1".
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