FDM 3D Printing: Troubleshooting Mechanical and Temperature Issues

The popularity of 3D printing technology has made FDM printers increasingly common and popular among makers. Although the principle of this technology is relatively simple, users may still encounter various failures. In particular, problems with mechanical components and temperature control are obstacles in the FDM printing process. In this troubleshooting guide, we'll discuss common problems in both areas, possible causes, and solutions. Mastering the solutions to these common problems will not only help users become more proficient in using FDM printers, but will also help improve print quality and optimize printer performance.


Mechanical and Movement Issues

Users may experience motor jitter, unusual sounds, and print head movement problems. These problems are usually related to the mechanical settings of the printer and can be checked to locate the problem.

Motor Shaking or Abnormal Sound

  • If the belt is loose, the motor may vibrate or make abnormal sounds during printing. Please check the belt tension at each position of X/Y/Z. And whether the belt slips during motor movement.
  • The motor cable is not connected correctly. Check each connection to make sure all components are securely connected and aligned. Then check the cable routing for any faults.
  • If the driving current is too large/too small or the motor is faulty or damaged, it is recommended to contact the manufacturer of the FDM printer for customer service support and help.

Print Head Move Abnormal

Abnormal print head movement may occur due to loose or blocked rails, worn bearings, or damaged stepper motors. You can try to clean the guide rails and remove debris and other obstacles; if the bearings are worn, you can consider replacing them. If necessary, you can replace the stepper motors that are not working properly.

Temperature and Sensor Problems

Temperature control is crucial for FDM printing. When the sensor is abnormal, problems such as filament extrusion or leakage can easily occur. These types of problems can be solved by checking and maintaining temperature sensors, hot end assemblies, etc. to ensure proper temperature settings and proper extrusion of the selected filament.

T0 sensor abnormal

T0 sensor anomalies are usually caused by loose or damaged connections. Please check the hot end wiring to make sure it is well connected. Please check to make sure the sensor is clean and free of debris. If the temperature sensor is faulty, consider replacing it with a new one.

Filament Leaking

  • Hot end component is loose or damaged. Check and tighten the hot end assembly. Please pay attention to safety measures when operating.
  • The nozzle is worn and needs to be replaced in time.
  • Incorrect temperature setting. Different materials have different printing temperatures, and too high a temperature is prone to filament leakage. Please set the temperature according to the parameters recommended for the filament.

No Extrusion or Extrusion Motor Knocking

  • Tangle of filament on the spool may result in insufficient extrusion. Please straighten the filament and Teflon tube.
  • The correct temperature needs to be set. Make sure the nozzle temperature is set correctly and can reach the set temperature. (PLA is generally set at 190-210°C and ABS at 230-240°C).
  • The nozzle is clogged, try briefly heating the print head to a temperature above 230°C and then pushing the filament into the extruder. You can also use a nozzle cleaning kit to unclog the nozzles.
  • If the extruder motor fails and causes no extrusion, please replace it.


In Conclusion:

The proper operation of machine components and temperature control are crucial to improving the success rate of 3D printing and ensuring high-quality printing. Mastering the solutions to these common problems is a key step in using FDM printers proficiently. Keeping your printer in good condition and avoiding unnecessary wear is beneficial for printing smooth, ideal models, as well as enhancing the printing experience. This guide is for reference by 3D printer users. Specific issues may vary from machine to machine. If necessary, please consult the FDM printer manufacturer for help.

Anycubic Kobra 2 Series FDM printers have high-speed capabilities and can greatly improve 3D printing efficiency. Both high speed and high quality, with powerful performance FDM printer: Anycubic Kobra 2 Pro, speed up to 500mm/s. Among large-size fast 3D printers, Kobra 2 Max is the first choice, it has a printing size of 420*420*500mm and a printing volume of up to 88 liters.

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