Navendynamo
SON SX 6V 3W
K439 Schmidts Original 16" - 20"
Schmidt Maschinenbau Navendynamo
Manufacturer
Wilfried Schmidt Maschinenbau Tel. (+49) 7071 38870
Aixer Strasse 44 Fax (+49) 7071 38876
D-72072 Tübingen e-mail: info _at_ nabendynamo.de
Germany www.nabendynamo.de
Instrucciones de montaje en la Brompton:
Montaje SON XS
http://www.nabendynamo.de/produkte/pdf/english/Montage_SON_XS_bro_e.pdf
Fotos del desmontaje en este blog
Important advice
With lights switched off, the fast spinning generator induces a high and
possibly dangerous voltage. For this reason the switch and generator must
be connected by a fully insulated cable like the one provided, i.e. with no
bare parts.
Wheelbuilding
The SON XS is designed for the usual tangent (crossed) form of spoking. Radial
spoking is also permitted. Flange thickness and spoke holes are optimized for
high quality 2 mm (14g) spokes. For the current Brompton rim 349x19 (available
since 2005, wear-indicator groove at the sidewall) with 28 spoke holes 148 mm
long spokes are recommended, mounted 2 cross not interlaced. For radial
spoking use 133 mm long spokes. Older Brompton rims (marked “Alesa”) need
spokes 2 mm longer.
Attention! Unlike the classic SON the axle is made from aluminum and
correspondingly more delicate. The axle end should in no case be clamped
from the sides or highly loaded during the wheelbuilding process.
Fitting the front wheel
A Brompton with the original mudguards has one
mudguard stay clamped onto the hub axle on the left
side of the fork. The axle ends are longer than usual
for hollow axle hubs to hold the retaining washers,
which also embraces the eyelet of the mudguard stay
on the left side.
The hub is secured using the included skewer set. It
fits the same way as a quick-release, but fastens with
a 4 mm Allen key. Apply a little grease on thread
and screw-head but not on the shank (to prevent
clogging up the pressure compensation system
leading into the hollow axle). Recommended
fastening torque is 8 to 10 Nm - easily achieved with
the normal length of the Allen key. If the skewer
tension is too low, the axle may move inside the fork
end causing a rattling noise.
The skewer has to be screwed into the nut for at
least 5 turns before noteworthy force is necessary
to tighten it. You might have to remove a washer
on the right side to achieve this.
Fitting the headlamp
The room between the locking-lever of the mounting block for the Brompton front
bag system and the mudguard is very limited. The round Lumotec with toggle
switch and our E6 with ring switch can be fitted. The lamp bracket has to be
appropriately bent to make sure the headlamp won’t touch the mounting block
and the brake function is not affected.
Mounting at the handlebar means more freedom of choice between headlamps.
A good solution is the handlebar bracket made by riese & müller.
Connection of a rear lamp
The generator should always be connected to a 6V3W load. The usual way
is the combination of the 2.4W halogen headlight and a 0.6W rear light or a
special 6V3W halogen bulb. The permanent use of a 6V2.4W bulb alone
will shorten the bulb lifetime radically (not relevant for the E6 headlamp)!
We recommend a good quality LED rear lamp with capacitor standlight (e.g.
Toplight D plus by Busch+ Müller).
The rear lamp should be connected to the head lamp by double wiring, because
the bicycle frame with its bearings and links is no good conductor.
Most reliable and elegant cables are the Schmidt coaxial cables for rear lamps.
The cable for rear lamp with overvoltage protection (item no. 72095) must be
used in case the headlight itself is not provided with an integrated overvoltage
protection.
Maintenance
The generator is fully enclosed and maintenance free: there are no gears or
other moving parts inside. The wiring and lamps should be checked regularly,
and any defects repaired in order to avoid dangers caused by high voltage.
The ball-bearing cartridges are pre-lubricated and similarly maintenance free in
normal everyday use. A slight amount of play is normal with this type of bearing -
do not attempt to adjust or regrease them.
The aluminium axle and the parts that are pushed on are threadless. They
cannot and must not be twisted.
To avoid water ingress do not immerse the hub and take care when
washing it never to spray water (from a hose etc.) directly at the axle.
In case of any problems (e.g. worn bearings, damaged electrical contacts) let
your bike shop contact the manufacturer or importer. For warranty claims
(5 years from date of purchase) please add a copy of the purchase receipt.
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