Thaum xaiv tus naj npawb ntawm cov hniav zoo tshaj plaws rau cov saw hniav, nws yog ib qho tseem ceeb uas yuav tau xav txog ntau yam. Cov hniav naj npawb txiav txim seb hom kev txiav thiab cov khoom uas tuaj yeem txiav tau zoo. Txhawm rau xaiv kom raug, ib tus yuav tsum coj mus rau hauv tus account hardness thiab thickness ntawm cov khoom raug txiav, nrog rau qhov xav tau tiav.
Ua ntej, lub hardness thiab thickness ntawm cov khoom ua si lub luag hauj lwm tseem ceeb. Feem ntau, cov ntaub ntawv xws li hlau lossis ntoo tawv yuav tsum tau saws nrog cov hniav tsawg dua thiab cov gullets loj dua kom tshem tawm cov khoom zoo. Qhov no ua kom cov hniav tsis dhau dhau thiab cov txheej txheem txiav tau zoo. Hloov pauv, cov ntaub ntawv softer xws li plywood lossis yas xav tau cov hniav ntau dua kom ua tiav qhov zoo dua.
Qhov thib ob, qhov xav tau tiav ntawm kev txiav yog qhov tseem ceeb rau kev txiav txim siab. Lub saw hniav nrog cov hniav ntau dua yuav ua kom tiav, nrog cov kua muag tsawg heev thiab cov npoo du. Qhov no yog qhov tseem ceeb tshwj xeeb thaum ua haujlwm nrog cov khoom muag muag lossis muaj txiaj ntsig. Ntawm qhov tod tes, cov hniav qis dua yuav muab cov rougher tiav, uas tej zaum yuav siv tau rau qee yam kev siv xws li cov kws ntoo ntxhib.
Thaum kawg, ib qho yuav tsum xav txog qhov ceev ntawm kev txiav. Cov hniav nrog cov hniav qis dua yuav txiav sai dua, thaum cov hniav ntau dua suav muab qhov txiav qeeb dua, meej dua. Qhov no yog qhov tseem ceeb thaum ua haujlwm ntawm cov haujlwm nrog lub sijhawm txwv lossis thaum qhov tseeb yog qhov tseem ceeb tshaj plaws.
Hauv cov ntsiab lus, xaiv tus naj npawb ntawm cov hniav zoo rau cov saw hniav yuav tsum xav txog qhov hardness thiab thickness ntawm cov khoom, qhov xav tau tiav, thiab qhov yuav tsum tau txiav ceev. Los ntawm kev noj cov khoom no rau hauv tus account, ib tus tuaj yeem ua kom tau txais txiaj ntsig zoo thiab raug txiav.
Xaiv txoj cai saw hniav tshwj xeeb yog qhov tseem ceeb, tsis hais seb koj puas txiav ntoo, txhuas, hlau, lossis acrylic. Ib qho tseem ceeb tshaj plaws uas yuav tsum tau xav txog yog tus naj npawb ntawm cov hniav ntawm cov saw hniav. Ob peb cov hniav tuaj yeem ua rau kev txiav tsis ruaj khov thiab qhov chaw txiav tsis zoo. Ntawm qhov tod tes, ntau cov hniav tuaj yeem ua rau txiav tsis kam thiab cua sov, ua rau cov hniav hlais thiab ua rau lub neej luv luv. Yog li ntawd, nrhiav kev sib npaug ntawm cov hniav thiab cov khoom raug txiav yog qhov tseem ceeb rau kev ua tiav cov txiaj ntsig zoo.