1.Stomatal gazawar yanayin
Sakamakon yawan iskar gas da aka samu a cikin rami na simintin simintin gyaran kafa yayin jefar da simintin babu komai, lalacewar simintin da ya haifar da rashin kyawun tsarin simintin simintin.

2.Camshaft rami zagaye
Izinin sarrafawa da ya rage a tsarin da ya gabata bai isa ba.
Matsakaicin daidaitawar aiki na tsarin da ya gabata.
Fuskar daidaitawa baya lebur (yanke ko ƙazanta).
Matsakaicin daidaitawa na gabanin aiwatarwa da bayan aiwatarwa ba su zo daidai ba.

3.Scratches akan saman da aka sarrafa
Ana samar da kayan aikin a lokacin aikin isarwa.
Toshe madaidaicin madaidaicin yana da bursu ko tsangwama.
Lokacin cirewa da hannu, rashin aiki na kayan aikin hannu yana haifar da shi.

4.Crushed surface an sarrafa
Lokacin da na'urar yankan ke clamping da workpiece, da sakawa surface na tsayarwa ba a tsabtace, da saura kwakwalwan kwamfuta suna crushed da workpiece ne crushed.
Chips sun kasance a cikin tashar ruwa na aikin aikin yayin tsaftacewa, yana haifar da kwakwalwan kwamfuta don murkushe aikin lokacin da aka danna catheter da zoben wurin zama.

5. Yanayin rashin ƙarfi
Dakarun waje suka haifar.
Damuwar zafi da aka haifar yayin aikin simintin gyare-gyare.

6. Ba a danna zoben wurin zama a wurin ba
Akwai ƙazanta a cikin rami na ƙasa na zoben wurin zama.
Lokacin da aka danna zoben wurin zama, ba a sanya zoben wurin zama da kan matsa lamba daidai ba.
Matsin injin bai isa ba.
Babban diamita na waje na zoben wurin zama ko ƙaramin rami na zoben kujera na Silinda ya yi girma da yawa kuma ba ya cikin wurin latsawa.

7. Gyaran zoben bawul
Gyara kayan aikin ya gaza.
Sigar da aka bayar na zurfin ciyarwa baya aiki.
Yanayin kayan aiki yana haifar da ƙaƙƙarfan rashin cancanta.