1. Saib seb cov cim ntaus cim ua tiav. Kev ntim khoom ntawm cov khoom lag luam muaj txiaj ntsig zoo, cov ntawv xuas tes sau rau ntawm lub thawv ntim tau yog qhov tseeb, thiab cov ntawv txheeb xim ci tau ci. Cov thawv ntim khoom thiab lub hnab yuav tsum khij nrog cov khoom lag luam, cov khoom tshwj xeeb, qauv, cov khoom lag luam, cov ntawv sau npe ntawm cov tub ntxhais lag luam, cov npe tsev lag luam, chaw nyob Hoobkas thiab xov tooj, thiab lwm yam Cov tuam txhab lag luam tseem ua lawv tus kheej cov cim ntawm cov khoom siv. Qee qhov tseem ceeb, xws li lub tshuab tsim hluav taws xob, cov xa tawm, cov roj twj tso kua mis, kuj tseem muaj cov lus qhia, daim ntawv pov thawj thiab cov ntawv pov thawj tus neeg kuaj xyuas txhawm rau coj cov neeg siv thiab tswj kom raug. Thaum xaiv thiab yuav khoom, nws yuav tsum tau ua kom zoo zoo kom tiv thaiv kev yuav khoom ntawm cov khoom cuav thiab qis.
2. Saib seb lub ntsuas loj puas tsawg. Qee qhov yooj yim deformed vim kev tsim khoom tsis zoo, kev thauj mus los thiab kev cia khoom. Thaum kuaj xyuas, qov ntu tuaj yeem muab dov ib qho ntawm daim iav kom pom seb puas muaj lub teeb nrawm ntawm qhov sib koom ua ke ntawm cov ntu thiab iav phaj los txiav txim seb lawv puas khoov lossis tsis; thaum xaiv clutch driven disc steel ntawv lossis ntawv txhuam, daim ntawv hlau thiab cov ntawv txhuam tuaj yeem tsa nyob rau hauv pem hauv ntej ntawm lub qhov muag kom pom seb lawv puas ntsiag to; thaum xaiv cov roj foob, roj roj foob nrog cov pob txha pob txha yuav tsum nyob rau hauv txoj kab ke zoo, thiab lub zog yuav txuag tau. Tsis muaj qhov deflection yuav tsum tau thaum nws raug sib txuas nrog cov iav tiaj tus; lub sab nraud ntawm cov roj foob tsis muaj pob txha yuav tsum tau ncaj ncaj thiab txiav los ntawm kev tuav tes, kom nws tuaj yeem rov qab mus rau nws lub xeev qub tom qab loos tes. Thaum xaiv thiab yuav txhua yam ntawm cov ntaub pua chaw, yuav tsum tau them nyiaj rau kev kuaj lub geometric loj thiab cov duab.
3. Pom tias qhov sib koom tes sib luag. Nyob rau hauv tus txheej txheem ntawm kev tuav thiab khaws cia, qhov chaw feem ntau tsim cov burrs, indentations, puas tsuaj lossis tawg hauv qhov sib koom vim muaj kev co thiab khob, uas cuam tshuam rau kev siv ntawm qhov. Thaum xaiv thiab yuav khoom, xim yuav tsum them rau qhov kuaj xyuas.
