| The following is from the rec.sport.fencing FAQ 11/2/97.
PART 2: Equipment
Equipment & Maintenance:
2.9 Guards
Foil guards vary mostly in diameter, being between 9.5 and 12 cm
across. The largest guards (eg. Negrini) may fail the weapon
guage check if they are dented or misshapen.
Epee guards are almost always the maximum diameter (13.5 cm) for
best protection, although they can vary considerably in shape,
depth (3 - 5.5 cm), weight, and eccentricity (up to 3.5 cm off of
center).
"Mini epee" guards are available from some vendors, but they are
recommended only for children or possibly Pentathletes.
Sabre guards come in left- and right-handed versions (the outside
of the guard being larger). Competition guards include attachments
for the capteur sensor. Sabre fencers may wish to insulate the
outer edges of their guards to prevent it from shorting to their
cuff.
2.10 Points
Many fencers have experienced trouble mixing their points,
barrels, and wires. They are best used in matched sets.
Points are regularly tested in competition. Both foil and epee
points must pass a weight test, by lifting a mass (500g for foil;
750g for epee) after the point is depressed. (Technically, epees
only have to lift the mass 0.5 mm, whereas foils must lift it to
the top of the point travel.) In addition, epees must pass two
shim tests, the first to make sure that there is at least 1.5 mm
of travel in the tip, and the second to make sure that the point
doesn't light until the last 0.5 mm.
If the weight test fails, the main spring can be replaced or made
heavier by lightly stretching it. If the fencer thinks his point
is too heavy, the spring can be replaced, compressed, or softened
by heating one end in a flame.
If the epee 0.5 mm shim test fails, the secondary contact spring
is too long. It should be adjusted or compressed. If the 1.5 mm
shim test fails, your point may be improperly set up, or may be
mismatched with the barrel.
Most points are held together by a pair of screws on the side of
the barrel, and adjusting the springs requires disassembly. Some
(Italian and Russian?) epee points are screwless and are adjusted
using a small wrench.
FIE epee points use a solid contact in place of the secondary
spring. Lighting distance can be increased by carefully filing
the contact.
Epee points work by closing the circuit between the two blade
wires when they are depressed. Dirty or faulty points will
normally cause the weapon to fail to register touches. Foil
points work in the opposite manner, by opening a closed circuit
between the blade wire and blade. Dirty or faulty points will
usually cause the weapon to produce spurious off-target lights.
See Troubleshooting (sections 2.13, 2.14), below.
Blade wires are typically insulated with cotton to facilitate
gluing and cleaning. Nevertheless, inexpensive wires can be made
at home using plastic-coated wire-wrap wire from an electronics
store. Use the cup from an old wire, and attach the new wire by
heating the solder connection with a soldering iron.
Blade tips are threaded metric 3.5 x 0.60 for foils and 4.0 x
0.70 for epees. Rethreading with a die is difficult, but
possible with adequate preparation. Pre-filing the tip into a
long, blunt cone (5.5 mm long with the top 1.5 mm narrower than
the inside diameter of the die) will assist in guiding the die
through the initial turns; the extra metal left behind can later
be removed with a file. The leading edge of the wire groove
should be rounded and the groove filled with epoxy putty or
similar hard compound to prevent the die from jamming on the
groove edge. The putty must be removed afterwards, of course.
No more than 4 mm of threading is needed to affix the barrel.
2.11 Body Wires
The primary question with foil and sabre body wires is bayonet
(eg. Paul brand) vs. two-prong (eg. Uhlmann brand). They are
equally functional; the primary difference is in cost and
maintenance. Two-prong is a simpler design, and usually less
expensive, but also has a reputation for being less reliable
(depending on the brand). Naturally choice of body wire also
determines the choice of weapon socket (or vice versa). One of
the primary considerations in deciding which format to go with
should be the prevalent format in your club or region. Going
with the local favourite will make it easier to borrow weapons or
wires when yours fail.
Epee body wires are all of the same basic 3-prong design. Some
(French) designs have metal sheaths on the prongs that can
accumulate grime underneath them over the years. If not cleaned,
the dirt can break the circuit at inopportune times.
2.12 Glue
Recycled blades must be cleaned before they are re-wired.
Solvents such as acetone can help, but 10 minutes with a utility
knife (foil) or wire brush (epee) to remove all traces of glue
residue from the wire groove also works. New blades sometimes
require a small amount of cleaning as well, to remove grease and
grit from the machining process.
Popular wiring glues include Duco cement, 5-minute epoxy, and
cyanoacrylate glues (eg. super-glue). Cleaning and gluing
techniques will vary depending on your choice. Thin,
quick-drying glues such as cyanoacrylates are best put down over
top of the wire as the wire is held in the groove. If you use a
thicker glue such as epoxy, you can carefully prepare one surface
first. For foil wires, coat the wire in glue, and then gently
pull it tight and lay it into the groove. For epees you can
alternatively lay a bed of glue down before setting the wire in
the groove, then make a second run of glue over the wire to seal
it in place. Top glue the blade, and let it dry while the blade
is held in a flexed position with the point in the air.
An acetone bath for cleaning blades can be constructed from a
length of copper tubing, sealed at one end. Fill with acetone,
drop in your blades, and let soak overnight.
A blade-bowing tool for holding blades flexed while the glue
dries can be constructed from a length of cord or chain attached
to some small cups (film cannisters work well). Place the cups
over either end of the blade, and the tension of the cord will
hold the blade bent for as long as you need it. Alternatively,
stand the blade up with the point bent under the rim of a counter
or table.
2.13 Scoring Apparatus
The scoring apparatus consists of the reels, floor wires, and
indicator box, and optionally a timer and scoring tower(s). In
sabre, the capteur sensors can also be considered part of the
scoring apparatus, since they are provided by the tournament
organizers.
Modern foil scoring boxes should display only a coloured light or
a white light for each fencer. Older boxes (or ones with older
firmware) may display both if an off-target touch is immediately
followed by an on-target touch.
It is possible to defeat the foil scoring circuit by grounding
your own weapon to your lamé (your opponent's touches will fail
to register, but yours will register). This is illegal, and
scoring boxes must be equipped with a grounding light to detect
when fencers do this. Some newer boxes have an anti-fraud
feature to eliminate this hazard and allow touches to be scored
in spite of grounding. Boxes without such an anti-fraud circuit
are useful for detecting dead spots on lamés (ground the lamé,
and then poke the opponent in various locations; white lights
indicate a dead spot).
Many sabre scoring boxes come with a variety of special options
or programs for variations on the standard rules; for example,
fencing without sensors, or with modified whipover timeouts.
Reels are typically portable, spring-wound devices (either
"turtles" or "snails"), although some salles have permanent
overhead installations involving pulleys and bungee cords. The
overhead variety is normally more reliable, since it has fewer
mechanics and no electrical brushes.
The Parcival, K.U.Leuven Fencing Club has a schematic and
instructions for constructing a scoring box at their website:
http://lcbdindy.fys.kuleuven.ac.be/fencing/fencing.htm
2.13.1 Wireless Systems
Wireless scoring systems are currently prohibited, largely due to
the difficulties in distinguishing between real and forged
signals. Various modern electronics technologies hold the
promise of circumventing these problems, and some wireless
designs are currently in development. The FIE is expected to
rule on the use of these wireless scoring systems in the near
future.
Simple "buzzboxes", compact battery-powered devices that signal
touches with a light or buzzer, are available from various
sources, but have very limited functionality. As a rule, they
cannot distinguish between targets (on/off, bell hits, etc.), or
distinguish the timing of hits, and do not work with sabre at
all.
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