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1.6 Machine description
The tenon cutting machine ZAF 250 makes
it possible to manufacture straight and
angled (max. 60°) tenons fast, accurately,
efficiently, and with exact tolerances, com-
plete with an all-round chamfer and auto-
matic face-grinding for angled tenons. The
tooling change for the manufacture of flat-
tenings is fast and simple. For all kinds of
machining operations and for straight as
well as for angled tenons, the workpiece
always remains in the same position and
does not require labour- and time-consu-
ming moving. This is made possible by the
integrated tilt position of the entire machi-
ning unit.
The 3 m (9.9 ft) long infeed table safely
supports the workpiece to be machined
and can accommodate workpieces of up to
500 x 250 mm (19 11/16 x 9 27/32 in.) for
straight tenons, and up to 220 x 250 mm (
8 21/32 x 9 27/32 in.) for maximum tilt
angle. The integrated double stop plate
and the accurate scale allow for exact
length measurement even in case of ma-
chining at both ends of the workpiece.
The combination cutting tool developed
specifically for ZAF can be set easily and
quickly to different tenon length and, after
removal of the cutter ring, switched to flat-
tening operation. It is equipped with repla-
ceable hard metal reversible knifes that
can be reversed three times. Thus, a long
operating life of the tool is guaranteed be-
fore the reversible knifes need to be repla-
ced.
The machine has easily accessible setting
elements. Together with the clearly reada-
ble scales and the easily visible line laser,
these elements allow for accurate setting
of the desired geometry of tenon or flat-
tening.
All electrical switches for controlling the
machine are arranged at the clearly struc-
tured operating panel located directly at the
workplace. Use the operating mode selec-
tion switch to preselect the operating mo-
des Curtain closed, Setting, Manual milling,
Tenon, and Flattening. In the operating
mode Tenon and Flattening, all functions
will run automatically after the start com-
mand has been given:
Closing the protection curtain, starting the
drive motor for the cutting tool, tracing the
tenon contour with face grinding, setting
and chamfering, returning the tool to home
position, switching off the drive motor, and
opening the protection curtain.
The ZAF 250 Vario allows reduction of the
feed to 50%.
At this setting, the powerful drive unit relia-
bly meets the high requirements of the chip
removal processes commonly applicable in
a carpentry.
The chips resulting from machining are eit-
her ejected downwards through adjustable
shutters, or - in case of stationary operati-
on in a joining shop - may alternatively be
disposed of into the extraction system via
the standard hose connectors.
1.7 Safety devices
The equipment described her-
ein is necessary for the safe
operation of the machine. It
must not be removed or ren-
dered ineffective.
Already during the development of this
new machine, optimum working conditions
were one of our key concerns, from a num-
ber of mechanical and electrical safety fea-
tures up to the consideration of ergonomic
principles and measures to reduce the
emission of noise and dust.
The machine is equipped with all protective
devices required during its intended use to
protect the operator and others from those
risks that could not be eliminated by the
machine design. This protective equipment
comprises in particular:
1. Milling tool:
Designed pursuant to EN 847-1, with chip
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