Extrusion Issues How to Fix it Now

Discover effective solutions for 3D printer extrusion issues. Learn to fix clogged nozzles, ensure filament supply, and tackle slipped extruder gears.

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In the realm of 3D printing, encountering a situation where your printer stops extruding mid-print can be frustrating and time-consuming. Understanding Extrusion Issues and addressing the root causes of this issue is essential for smooth, uninterrupted printing. This article delves into the common problems and their effective solutions.

Identifying and Resolving Clogged Nozzles

The Prevalence of Nozzle Clogging

Nozzle clogging is a frequent culprit behind Extrusion Issues. The blockage typically occurs due to hardened filament within the nozzle, disrupting the smooth flow of material.

Effective Clearing Techniques to conquer Extrusion Issues

  1. The Cold Pull Method: This technique is highly effective, especially with materials like Nylon. It involves heating the hotend to the filament’s working temperature, pushing the filament through until it clears previous material, and then allowing the hotend to cool. Repeating this process 2-3 times often results in a clear nozzle.
  2. Needle or Wire Technique: Utilizing a thin needle or wire (0.4 mm in diameter), this method involves gently poking the nozzle at printing temperature to dislodge blockages. Caution is advised to avoid injuries and potential damage to the nozzle.

Ensuring Adequate Filament Supply

Regular Filament Checks

A simple yet often overlooked aspect is verifying the filament reel’s sufficiency before starting a print. Running out of filament mid-print can abruptly stop the extrusion process.

Tackling Slipped Extruder Gear Issues

Understanding the Mechanism

The drive gear in FDM printers grips and pushes the filament towards the hot end. If the filament is obstructed or the gear is dirty, it may slip, ceasing to feed the filament effectively.

Practical Solutions against Extrusion Issues

  • Adjusting Nozzle Temperature: Increasing the nozzle temperature by 5-10 degrees can facilitate smoother filament flow.
  • Modifying Printing Speed: Slowing down the extrusion rate ensures the hot end has enough time to melt the filament, preventing gear slip due to over-speed.
  • Regular Gear Maintenance: Keeping the drive gear clean is crucial. Accumulated plastic shreds from previous slips can impair the gear’s grip, increasing the likelihood of future slips.


Addressing mid-print extrusion stops in 3D printing involves a multifaceted approach. Regular maintenance, timely identification of issues, and applying the appropriate solutions can significantly reduce printing disruptions.


What causes a 3D printer to stop extruding mid-print?

Common causes include clogged nozzles, insufficient filament supply, and slipped extruder gears.

How can I unclog a 3D printer nozzle?

Use the cold pull method for soft filaments or a needle/wire technique for more rigid blockages.

What should I do if my printer runs out of filament mid-print?

Regularly check the filament reel before starting a print to ensure there is enough material for completion.

Why is adjusting the nozzle temperature important?

Increasing the nozzle temperature by 5-10 degrees can help the filament flow more smoothly, preventing extruder gear slip.

How do I prevent the extruder gear from slipping?

Keep the extruder gear clean to maintain grip and adjust printing speed to match the hot end’s melting capacity.

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