Inzwa yokucindezela engu-17216318 ifanele i-VOLVO roller/grader

Lapho ukhetha inzwa efanele, izinhlobo ezahlukene zemishini nezilawuli ezihlelekayo zidinga ukunaka imininingwane. Cishe yonke imishini yesimanje edinga ukulungiswa noma ukuthuthukiswa inezidingo ezicacile zezinhlobo zedatha okufanele zilandwe. Akuwona kuphela umshini onezidingo ezithile, kodwa futhi i-CPU nemojula yesistimu yokulawula inezidingo zabo.

Ngenxa yalokhu kuhlukahluka, kunezinhlobonhlobo zezinzwa ezitholakalayo, futhi inzwa ngayinye yakhelwe umsebenzi okhethekile futhi inikeza ukucushwa kwedatha okucacile kakhulu. Kuleli phepha, inqubo yokukhetha inzwa efanele yezinhlelo zokusebenza ezahlukene izocutshungulwa ngokucophelela. Ikakhulukazi, ulwazi oluyisisekelo lokusebenzisa imingcele yomshini ukucacisa uhlobo lwenzwa okufanele lukhethwe, indlela yokuhlonza i-polarity yezinzwa edingekayo, kanye nendlela yokukhetha phakathi kwezifunda ezivame ukuvuleka nezivamile ezivaliwe zizokwethulwa.

Izinhlobo ezihlukene zezigaba zezinzwa

Ubudlelwano phakathi komkhiqizo ozama ukuwuthola nokukhetha kwenzwa kubaluleke kakhulu kunanoma yini enye. Ngokuvamile, uma uthola ukuthi wenze ukukhetha okungalungile kulezi zici, ungathola indlela yokuhlela noma imojuli ukuze uhlehlise ukugqama kwesiginali.

Kodwa-ke, uma isigaba sezinzwa esingalungile sikhethiwe, umkhiqizo ungase ungabonwa nhlobo. Alikho inani lamasekhethi elingaxazulula le nkinga.

I-polarity yezinzwa

Ama-inputs amaningi edijithali adinga ukuxhunywa ku-voltage ye-DC, ngokuvamile engu-10 kuya ku-24 vDC. Nokho, ezinye izinhlelo zingasebenzisa i-voltage engu-120 vAC noma ngezinye izikhathi engu-24 vAC yokulawula. Lezi ziwusizo kwezinye izimo ezikhethekile, ngoba azidingi ukuxakaxaka kwamandla kagesi we-DC futhi zidinga kuphela i-transformer.

Lezi zinzwa ze-AC ngokuvamile azisethwa nge-polarity, futhi amashidi edatha ngokuvamile abonisa ukuthi imithwalo ingafakwa ezintanjeni ezishisayo noma ezintanjeni zamandla ezimaphakathi, ezivame ukuba nsundu neziluhlaza okwesibhakabhaka kusukela kumahhanisi omsila anezintambo zangaphambili.

Inzwa ye-AC kufanele ikhethwe kuphela uma imojuli yokufaka yesilawuli ilungiselelwe njenge-AC. Lokhu akuvamile njenge-DC, kodwa lolu hlobo kufanele lusetshenziswe uma imojuli yakhelwe okokufaka okungu-120 vAC.

Ivamise ukuvuleka noma kuvame ukuvaleka

Omunye umehluko kunqubo yokukhetha inzwa ukukhetha phakathi kokuvula okujwayelekile (NO) nokuvamise ukuvala (NC). Ngaphakathi kobubanzi besistimu yokulawula idijithali, akwenzi mehluko ngempela, inqobo nje uma uhlelo lubhalelwe inzwa efanelekile.

Umehluko kuphela we-NO / NC ukuthi uma uhlobo lwenzwa lukhethiwe ukwenza isifunda senzwa sivuleke ngaphezu kuka-50% wempilo yayo, ingasindisa amandla. Ukonga izindleko kungase kube kuncane, kodwa uma izindleko zokuqala zenzwa zifana, kunengqondo ukukhetha imishini esebenza kahle kakhulu yokuklama.