First, before turning on the 3D printer every day, do some necessary checks: if the nozzle is blocked or damaged, whether the connection wires are normal, whether the motor bearings and guide rails are short of oil, and whether the platform is calibrated. If there is any retentate in the nozzle, it should be cleaned up immediately. If the part is damaged or aged, it should be replaced in time. Regularly add lubricating oil to the moving parts. If the nut is loose, tighten it. Secondly, in the printing process of the 3D printer, the parameter settings should not exceed the limit of the device. Otherwise, the qualified product cannot be printed. If the temperature is too high or the load is too large, the device may be damaged. There is also a place where something is wrong during the printing process. If necessary, stop the machine. Do not let the device continue to work because of the need to reprint after worrying about the downtime. Finally, after the printing is completed, the cleaning work should be done. The dirt on the nozzles, platforms, guide rails, motors, fans, etc. of the 3D printer should be cleaned up. Do not accumulate for a long time and cause the last bad cleaning.