ujk technology Parf MK II Bedienungsanleitung Seite 3

The PGS concept is based on the Pythagoras Theorem -
for any right angled triangle the square of the hypotenuse
is equal to the sum of the squares of the other two sides.
Woodworkers have been using this knowledge for millennia.
The particularly useful special case for this theorem is when
the length of the sides are 3 and 4 units then the hypotenuse
is 5 units long.
The relationship still holds true if those lengths are doubled so
that the sides are 6 and 8 units and the hypotenuse is 10. These
are the values used with the PGS and one unit equals 96mm.
Using just 2 Parf Sticks it is possible to create a series of
accurately placed 3mm holes with the rows at right angles to
the columns. Then, using the Guide Block, the 3mm holes can
be enlarged, again very accurately, to produce the final pattern
of 20mm holes.
There are two 3mm Drill Guides which look very similar.
On the underside of each is a short protrusion or spigot
which is 6mm in diameter and is designed to fit into the
6mm holes of the Parf Sticks. It is recommended that a
pecking action is used with both the 3mm drill and the 20mm
cutter. Cut a quarter of the way through and withdraw the drill
slightly, drill the next quarter and withdraw and so on. One
3mm Drill Guide has a spigot designed to fit into a single Parf
Stick and the other has a longer spigot that will go through
two Parf Sticks.
The 3mm Drill Holder will have a 3mm drill fitted and
secured with a grub screw. The Drill Holder fits into either
of the 3mm Drill Guides.
The spigot of the appropriate 3mm Drill Guide should
be inserted into the 6mm hole on the Parf Stick before the
3mm drill holder is fitted. Always ensure that the spigot is
fully home in the 6mm holes of the Parf Stick before
inserting the 3mm Drill Holder.
Note: The groove in the 3mm Drill Holder needs to be wiped
occassionally.
The 3mm Pins have a 6mm wide shoulder that is designed
to fit into the 6mm holes of the Parf Sticks. It is essential that
when using 3mm Pins with the Parf Sticks that the user
checks that the Pins are fully seated in the 6mm holes.
TIP: When inserting a pin through a Parf Stick and into an
existing 3mm hole, raise the end of the Parf Stick, locate
the 6mm section of the pin in the Parf Stick and only then
push the Pin into the 3mm hole.
USING THE 3MM DRILL GUIDES
3
THE CONCEPT
USING THE 3MM PINS
Continues Over....
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Figure 4