This is the most straightforward thing you can do to avoid clogs. Simply remove your rubber extruder machine and use a toothpick-sized object to clean out any fragments of material left inside. You might also consider periodic cleaning with acetone. Bear in mind that waste material can get into other areas of the printer, particularly moving parts, and affect their performance, so it is advisable to use this opportunity to inspect the rest of the machine and ensure it is kept clean.

You might also consider a ‘cold pull’, where a clean length of filament is heated manually and pushed into the extruder. The heat is then turned off, and the filament is quickly pulled out, ideally taking any waste material with it. This method can prove effective, although it does involve wasting additional filament, which can prove expensive in the long term.

Check your extruder has been correctly fitted

Whenever you remove your printer’s extruder for cleaning, make sure it has been fitted correctly once you are done. An improperly fitted extruder will affect your printer’s achievable accuracy and is likely lead to misshapen prints.

Make sure your filaments are suitable for your machine

Filaments for 3D printing are not universal in design. As the diameters of different filaments can vary between materials and manufacturers, it’s important to choose one that will fit your printer, otherwise you run the risk of the extruder becoming clogged. Consult your printer’s manufacturer and your material supplier if you are in any doubt.

Make sure you always use the right temperature settings

3D printing materials need to be heated to different temperatures to print effectively, so it’s you should check your printer’s settings and your filament’s specifications before every print run. If a material is heated to an incorrect temperature, it will not deliver a clean print and is likely to cause a blockage.

Consider investing in a cleaning filament

These are specialist filaments that can be used to scrub the inside of an extruder. They are loaded into your machine in the same way as conventional filaments, heated and extruded, drawing any waste materials out of the printer as they do so. While these allow your extruder to be cleaned without having to remove it from the printer, bear in mind that they will represent an ongoing material expense, and so may not be a cost-effective choice for large-scale operations.

Periodically replace your extruder

Extruders are functional parts that will inevitably experience wear and tear over time, particularly if you’ll be making heavy use of abrasive filaments. It’s therefore a good idea to periodically replace your extruders as they wear out, or to use different extruders for different filaments (a heavy-duty steel extruder for more abrasive filaments, for instance).

Make sure your filament has been properly stored

3D printing filaments need to be stored correctly to ensure their chemical qualities stay optimised, allowing them to print correctly. Your filaments will be supplied with instructions for storage, which should be followed to the letter.

Developing an efficient maintenance process

Of course, with any sort of production-scale printing, it is essential that all maintenance for your fleet of printers is factored into the wider project workflows to ensure it does not become a disruption. For example, you should avoid situations where — for example — production of a part has to be delayed due to the scheduled printer being unavailable due to necessary cleaning. Any routine maintenance should therefore be factored into your machine scheduling process, so engineers can have complete confidence that any printers listed as available will be clean, functional and ready to go.

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