Aztec GEM II - Page 11

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3. Whyisitnecessarytosupplytwotypes
 ofcungdiscwhynotjustusea
 diamonddiscforallringcung?
4. ThemotorkeepsstallingandIamcertain
 thatIamfollowingthecungprocedure
 outlinedintheinstruconsi.e.not
 pressingdowntoohardonthecung
 discasImoveitbackwardsandforwards
 acrosstheringsurface.Alsothealkaline
 baeriesusedwerevirtuallynew.
5. HowdoIcheckauseddiamonddiscto
 ensurethatisserviceable?
6. Althoughwehaveusedwaterbased
 gelaspertheinstruconswesllreceive
 complaintsfromafewpaentsabout
 heatbuild-upinthering.
In fact either disc could be used for all the
cung procedures. However if a carbide
disc is deployed to cut through a hard metal
i.e. Steel it will wear down rapidly and
require to be replaced several mes during
the process of cung through a single ring.
If a diamond disc is used on so metal the
metal starts to clog up the diamond cung
facets eecvely blunng the discs cung
edge.
If you are not forcing the cung process
the fault lies with the power source.
Although Alkaline baeries are an excel-
lent power source when fresh the GEM II
ring cuer does drain the power from them
quite rapidly and if one of the four baer-
ies is below strength it will have a marked
eect on the performance of the ring cuer
motor. A more consistent and reliable
power source these days are provided by
re-chargeable NiMh baeries which are
widely available and inexpensive. They can
store and deliver more power over a longer
period of me than their Alkaline equiva-
lent. Re-chargeable NiMh hold their charge
for up to 6 months and can be re-charged
at any me as they do not suer from
the memory eect shown by the old NiCd
rechargeable baeries.
Simply run a nger around the outer rim of
the disc. If 50% of the surface feels rough to
the touch the disc has just enough diamond
grit to be serviceable. If not it must be
replaced. A worn disc will cut very lile but
generate a great deal of friconal heat.
Cung generates friconal heat. It can’t
be prevented but it can be controlled to
acceptable levels.