One, after 500 hours, the gearbox will have the iron dust or other impurities, so the gear should be cleaned and the reducer should be replaced at the same time.
Two, after a period of time, a comprehensive examination of the extruder should be carried out to check the tightness of all the screws.
Three, if the power is suddenly cut off in the process of production and the main drive and heating stop, when the power supply is restored, it is necessary to reheat each section of the barrel to the prescribed temperature and keep it for a period of time, then it can activate the extruder.
Four, if the steering full of the instrument and pointer is found, it should be checked whether the contact of the thermocouple equilateral line is good.
For more on these themes, see below.