UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
Multi-Conductor Cable: Cotton-Covered, Waxed and Twisted
A cable of several insulated wires in one bundle, such as the four leads of a strain-gauge bridge. Each copper wire is wrapped in cotton thread and soaked in beeswax, then the wires are twisted together and covered again.
Utangiye
An afternoon
Amabwiriza
1
1
Cut the conductors
Cut the conductors
Cut one copper wire per conductor (four for a bridge), a little longer than the cable.
Ibikoresho by'iyi ntambwe:
Insinga y'Umuringa4 lengthIbikoresho bikenewe:
Igikoresho cyo gukuramo igifuniko cy'insinga2
2
Wrap each wire in cotton
Wrap each wire in cotton
Clamp one end in the vise and the other in the hand drill's chuck, keeping it taut. Wind cotton thread on in a close spiral with no gaps, then a second layer the opposite way.
Ibikoresho by'iyi ntambwe:
Ubudodo bw'Ipamba1 as requiredIbikoresho bikenewe:
Ifatiro ry'Ameza
Igikoresho cyo gutobora gikoreshwa n'intoki
Umukasi3
3
Soak in beeswax
Soak in beeswax
Melt beeswax in a double boiler and draw each covered wire slowly through it. Wipe off the excess and let it set.
Ibikoresho by'iyi ntambwe:
Igishashara1 as requiredIbikoresho bikenewe:
Isafuriya ebyiri zo guteka ku mazi
Urubaho rushyushya4
4
Twist them together
Twist them together
Lay the covered wires side by side, clamp one end and twist them together evenly with the drill.
Ibikoresho bikenewe:
Ifatiro ry'AmezaIgikoresho cyo gutobora gikoreshwa n'intoki5
5
Cover the bundle
Cover the bundle
Wind an outer layer of cotton over the twisted bundle and wax it again.
Ibikoresho by'iyi ntambwe:
Ubudodo bw'Ipamba1 as requiredIgishashara1 as requiredIbikoresho bikenewe:
Ifatiro ry'AmezaIsafuriya ebyiri zo guteka ku maziUrubaho rushyushya6
6
Test it
Test it
Strip the ends. With a multimeter check each wire end to end, and check that no two wires touch.
Ibikoresho bikenewe:
Igikoresho cyo gukuramo igifuniko cy'insinga
Igipimo cy'amashanyarazi kinyuranye7
7
Limits
Limits
Cotton insulation is only good for low temperatures, up to about 105 °C (Wikipedia, Magnet wire), and for dry places and low voltages such as instrument leads. The method is general workshop practice, ours.
Ibikoresho
3- 4 lengthUmwanya
- 2 as requiredUmwanya
- 2 as requiredUmwanya
Iki gishushanyo gikora
CC0 Umurenge rusange
Iyi blueprint yasohowe munsi ya CC0. Ushobora gukoporora, guhindura, gukwirakwiza no gukoresha nta kwemererwa.
Shyigikira Umuremyi ugura ibicuruzwa binyuze muri Blueprint ye Komisiyo y'Umuremyi byashyizweho n'Abacuruzi, cyangwa kora verisiyo nshya y'iyi Blueprint ukayinjiza nk'isano muri Blueprint yawe kugira ngo musangire inyungu.