1.Band hniav dav

Qhov dav ntawm cov hniav yog qhov ntsuas los ntawm sab saum toj ntawm cov hniav mus rau sab nraub qaum ntawm cov hniav. Cov hniav dav dua yog qhov nruj dua tag nrho (ntau hlau) thiab nyiam taug qab zoo dua ntawm cov log tsheb dua li cov hniav nqaim. Thaum txiav cov khoom tuab, cov hniav dav dua muaj peev xwm tsis sib txawv vim qhov kawg ntawm lub nraub qaum, thaum txiav, pab tswj lub hauv ntej ntawm cov hniav, tshwj xeeb tshaj yog tias sab clearance tsis dhau. (Raws li lub ntsiab lus ntawm kev siv, peb yuav hu tau ib lub hniav uas yog 1/4 txog 3/8 nti nyob rau hauv dav ib "nruab nrab dav" hniav.)

Cov lus ceeb toom tshwj xeeb: Thaum rov ua dua ib daim ntoo (uas yog, ua rau ob daim ib nrab tuab li qub), cov hniav nqaim yuav txiav ncaj dua li cov hniav dav dua. Lub zog ntawm kev txiav yuav ua rau lub dav dav deviate sideways, thaum nrog cov hniav nqaim, lub zog yuav thawb nws rov qab, tab sis tsis yog sab. Qhov no tsis yog qhov yuav xav tau, tab sis nws yog qhov tseeb tiag.

Cov hniav nqaim tuaj yeem, thaum txiav qhov nkhaus, txiav ib lub vojvoog me me dua li qhov dav dav. Piv txwv li, ¾-inch-dav hniav tuaj yeem txiav 5-1 / 2-inch vojvoog (kwv yees) thaum 3/16-inch hniav tuaj yeem txiav 5/16-inch vojvoog (txog qhov loj ntawm dime). (Faj seeb: Lub kerf txiav txim siab lub vojvoog, yog li ob qho piv txwv no yog qhov tseem ceeb. Ib qho dav dua, lub ntsiab lus ntau dua sawdust thiab qhov dav dua, tso cai rau lub vojvoog me me dua nrog lub nqaim nqaim. Tab sis qhov dav dav dua txhais tau hais tias txoj kev txiav ncaj yuav yog. rougher thiab muaj ntau wandering.)

Thaum pom cov ntoo tawv tawv thiab cov ntoo siab ntom ntom zoo li Southern yellow Pine, nws yog kuv qhov kev nyiam siv dav dav li qhov ua tau; Cov ntoo uas tsis tshua muaj zog tuaj yeem siv cov hniav nqaim, yog tias xav tau.

2.Band hniav thickness

Feem ntau, qhov tuab ntawm cov hniav, qhov nro ntau dua tuaj yeem siv tau. Cov hniav tuab kuj yog cov hniav dav dua. Ntau qhov nro txhais tau tias kev txiav ncaj. Txawm li cas los xij, cov hniav tuab txhais tau tias ntau dua sawdust. Thicker blades kuj nyuaj rau khoov ib ncig ntawm lub log, yog li feem ntau manufacturers ntawm bandsaws yuav qhia ib lub thickness los yog thickness ntau. Me me txoj kab uas hla band log xav tau cov hniav nyias. Piv txwv li, 12-inch txoj kab uas hla log yog feem ntau nruab nrog 0.025-nti tuab (siab tshaj plaws) hniav uas yog ½ nti lossis nqaim. Lub log 18-inch inch tuaj yeem siv 0.032-inch tuab hniav uas yog ¾ nti dav.

Feem ntau, cov nplooj tuab thiab dav dua yuav yog qhov kev xaiv thaum saws ntoo tuab thiab ntoo nrog cov pob txha tawv. Xws li ntoo xav tau lub zog ntxiv ntawm cov tuab tuab, dav dav kom tsis txhob tawg. Thicker blades kuj deflect tsawg dua thaum resawing.