Blocked nozzle

Cause 1:Extruder Clogging

Solution 1: The printer chamber temperature is too high, causing the material to soften and compress at the extruder gear, resulting in clogging (low-temperature-resistant materials like PLA and PETG are more prone to this).

Solution 2: Material is too soft and deforms under pressure at the extruder gear. When printing flexible materials like TPU or TPE, reduce print speed and retraction distance. It’s best to use direct-drive extrusion for such materials.

Solution 3: Extruder gear is worn out, or the tension is too tight or too loose, causing it to either fail to grip or overly squeeze and deform the filament.  Check for excessive wear on the extruder gear. Replace if worn, and adjust gear tension appropriately.

Solution 4: Filament diameter is too large or too small, preventing smooth passage through the extruder gear. Measure the filament diameter. If deviation is too large, replace with a filament of consistent diameter.

Cause 2:Nozzle Clogging

Solution 1: Extended use or abrasive materials like carbon fiber can cause buildup and wear inside the nozzle. Regular cleaning is necessary. Use a hardened steel nozzle for carbon fiber. If unclogging fails, replace the nozzle.

Solution 2: Printing too fast causes the nozzle to lag behind extrusion speed, leading to material buildup and blockage. Reduce print speed, increase nozzle temperature to improve material flow.

Solution 3：Insufficient printing temperature prevents proper melting, causing clogging. Check that the temperature is correctly set for the material in use. If incorrect, increase the nozzle temperature accordingly.