Ngā Kani Pōhatu Rakau: Te Tūhura i ngā Āhuatanga, ngā Taipitopito Hangarau, me ngā Painga Matua

He taputapu tapahi porotaka te kani poka rakau i hangaia hei poka i ngā poka nunui, porowhita i roto i te rakau me ngā rauemi rakau (pērā i te papa rakau, te MDF, me te papa matūriki). Kāore i rite ki ngā wiri, e tango ana i ngā rauemi mā te tapatapahi i te mata, ka tapahia e ngā kani poka te taha o te poka e hiahiatia ana, ka waiho he mono rauemi i roto i te kani—nā tēnei ka whai hua mō te hanga poka mai i te ¾ inihi ki te 6 inihi (neke atu rānei) te whānui. Ka piri atu ki ngā wiri, ki ngā mīhini wiri rānei mā te mandrel, he tokotoko pokapū e mau ana i te kani me te tuku i te kaha hurihuri.

Ngā Āhuatanga Matua o ngā Kani Pōhao Rakau

1. Hanganga Rauemi

He pānga tika tō te rauemi o te kani poka rakau ki tōna pakari, tōna tere tapahi, me tōna pai mō ngā mahi rerekē:

• Rino Tere-Teitei (HSS): Ko te rauemi tino noa mō ngā kani rakau whānui. He utu tika te HSS, he koi, ā, he pai te mahi mō ngā rakau ngohengohe (pēnei i te paina me te hita) me te whakamahinga i ētahi wā. Ka taea e ia te tu atu ki te wera ngawari, ā, he ngāwari ki te whakakoi ina mangu.

• Rima-Metara: Ka whakakotahi ēnei kani i te mata tapahi maitai tere-teitei me te tinana maitai koranu ngāwari. Ka roa ake te koi o ngā niho HSS, ko te maitai koranu ia ka ātete ki te piko, ki te whati rānei—he pai mō ngā rakau mārō (pērā i te ōki me te māpere) me te whakamahinga auau. Ka hototahi hoki ngā kani poka maitai-rua ki ngā rauemi pēnei i te kirihou me te konganuku angiangi, ka nui ake te whakamahinga.

• He Mata Warowaihā: Mō ngā mahi taumaha me ngā rakau tino mārō (pēnei i te tīki, i te rōhi rānei), he pai ake te ātete o ngā kani poka he mata warowaihā ki te pakaru. Ka mau tonu te koi o ngā niho warowaihā ahakoa i raro i te wera nui, he mea tino pai mō ngā kaupapa ngaio, nui te rahinga.

2. Te Hoahoa Niho

Ko te whakatakotoranga me te āhua o ngā niho e whakatau ana i te ma me te whai hua o te tapahi kani:

• Niho Raker: He tauira me ngā niho hohonu me ngā niho papaku e taupatupatu ana, i hangaia hei whakakore tere i ngā maramara. Mā tēnei ka whakaiti i te aukati me te ārai i te wera nui, ka pai ai ngā niho raker mō ngā rakau ngohengohe me ngā rauemi matotoru.

• Wiri Whakamātautau: He wiri whakamātautau iti kei waenganui o te nuinga o ngā kani poka. Ka hangaia e tēnei wiri he kōhao ārahi, hei whakau i te kani, hei whakarite hoki kia noho pū te kōhao ki waenganui—he mea nui mō te tika, inā koa i ngā tapahi whānui.

• Tau o ngā Niho: Ina inehia ki ngā niho mō ia inihi (TPI), ko te TPI teitei ake (18–24) ka hua ake he tapahi pai ake, he maeneene ake (he pai mō ngā kōhao e kitea ana i roto i ngā tāonga), ko te TPI iti ake (10–14) ka tere ake te tango i te rauemi (he pai ake mō ngā kōhao taratara, huna).

3. Te Āpuro me te Mandrel​

Ka hono te arbor (te mandrel rānei) i te kani poka ki te wiri. Ko ngā āhuatanga matua ko:

• Rahi o te Kakau: He kakau ¼-inihi, ⅜-inihi rānei te nuinga o ngā mandrel hei whakauru ki ngā wiri paerewa, engari ko ngā kani nunui ake ka whakamahi pea i ngā kakau ½-inihi hei tāpiri i te pumau i roto i ngā mahi taipana teitei.

• Tikanga Tukunga Tere: Kei roto i ngā mandrel kounga teitei he pātene tukunga tere, e āhei ai ngā kaiwhakamahi ki te whakawhiti i ngā kani poka me te kore he taputapu—e penapena ana i te wā ina whakawhiti ana i waenga i ngā rahi.

Ngā Mōhiotanga Hangarau: Te Mahi a ngā Kani Pōka Rakau

1. Te Tere o te Tapahi

• RPM (Tahuritanga Ia Meneti): Ka tino pai te mahi a ngā kani poka rakau i ngā tere taurite. Mō ngā rakau ngohengohe, he pai te 1,500–2,500 RPM; mō ngā rakau mārō, āta haere ki te 500–1,500 RPM hei ārai i te wera o te rakau, i te whakapōturi rānei i ngā niho.

• Pēhanga Whāngai: Whakamahia he pēhanga pumau, māmā hoki. Mā te kaha nui rawa ka piri te kani, ka puta he kōhao kāore i te ōrite, ka pakaru rānei te taputapu. Tukua ngā niho ki te mahi—mā te tuku i te kani ki te whāngai māori ka ma ake ngā tapahi.

2. Te whānuitanga o te diameter o te poka

Kei te wātea ngā kani poka rakau i ngā diameter mai i te ¾ inihi (mō ngā poka waea iti) tae atu ki te 12 inihi (mō ngā whakatuwheratanga nui pērā i ngā putanga kaikorero). He maha ngā rahi o ngā huinga motuhake, e āhei ai ngā kaiwhakamahi ki te whakahaere i ngā kaupapa maha me te kete kotahi.

3. Te Kaha Hōhonu

Ko te roa o te rango o te kani e whakatau ana i te hohonu o te kōhao ka taea e ia te tapahi. Ko ngā kani paerewa ka taea te tapahi i te 1–2 inihi, ko ngā tauira tapahi hōhonu (tae atu ki te 6 inihi) he mea hanga mō ngā rauemi matotoru pērā i ngā kurupae rakau, ngā kāpata rānei.

Ngā Painga o te Whakamahi i ngā Kani Pōka Rakau Kounga

1. Te Whai Hua

Ka tangohia e ngā kani poka te taha o te poka anake, ka waiho he puru rakau pakari—he iti ake te kaha e whakamahia ana e tēnei i te keri i te rohe katoa, ka penapena wā, ka whakaiti hoki i te ngenge. He tere ake ēnei i te whakamahi i ngā mata kōhao, i ngā panga rānei mō ngā poka nunui.

2. Te Tika

Mā te wiri pairati me te hoahoa pumau, ka hangaia e ngā kani poka rakau he kōhao porowhita, pokapū me te iti o te 偏差 (peke). He mea nui tēnei mō ngā kaupapa pēnei i te tāuta i ngā raka tatau, ina kore e pai te tūnga o ngā kōhao.

3. Ngā mahi maha

Ahakoa i hangaia mō te rakau, ka taea e ngā kani poka kounga teitei (ina koa ko ngā tauira he mea hanga ki te maitai rua me te mata karāhe) te tapahi i ētahi atu rauemi pēnei i te kirihou, te pakitara maroke, me te mea angiangi. Nā tēnei ka taea te whakamahi hei taputapu maha i roto i ngā awheawhe me ngā papa mahi.

4. Te Whai Hua o te Utu

Ki te whakaritea ki ngā taputapu tapahi poka motuhake, he iti ake te utu o ngā kani poka, inā koa i roto i ngā huinga. Ka taea e te huinga kotahi te hipoki i ngā diameter rerekē, ā, kāore e hiahiatia te hoko taputapu takitahi mō ia rahi.

5. Ngā Tapahi Ma

Mā ngā niho koi me te tango maramara tere, ka waiho e ngā kani poka he taha maeneene, kāore he kohao. Ka whakaitihia te hiahia ki te oro, ki te whakaoti rānei, ka penapena wā i roto i te tukanga mahi—he mea nui mō ngā kaupapa ngaio he poto ngā rā kati.

Te Kōwhiri i te Kani Pōka Rakau Tika mō tō Kaupapa

• Rauemi: HSS mō ngā rakau ngohengohe me te whakamahinga DIY; bi-metal mō ngā rakau mārō me te tapahi whakarewa i ētahi wā; he pito carbide mō ngā mahi taumaha, ngaio.

• Rahi o te Kōhao: Kōwhiria he kani e rite ana ki ngā whakaritenga whānui o tō kaupapa. He pai ngā kete mō te maha o ngā mahi, engari he pai ngā rahi takitahi mō ngā mahi motuhake.

• Hoahoa Niho: Ngā niho raker mō te ātea maramara; he TPI teitei mō ngā whakaotinga maeneene; kia koi te wiri pairati mō te tika.

• Hototahi ki te Wiri: Tātaitia te rahi o te kakau o te mandrel ki te pū o tō wiri (¼-inihi, ⅜-inihi rānei mō te nuinga o ngā wiri kāinga).