Some tips to prevent nozzle clogging

Posted by Teddy Quinones on

It is normal to have some situations especially when you are starting in the world of 3D printing.

Here at 3DSmartShop, we are going to give you some tips that you should know to avoid the possibility of the filament getting clogging.

Clean the nuzzle when changing filament: This practice is very helpful as it will prevent excess plastic from clogging the new filament. Especially when you make changes to filaments that have different components and textures.

Print at the right temperature: Maintaining a suitable temperature is very important, but not all machines will work with the same temperatures. You may have to make some adjustments depending on the machines you are using, however always use the manufacturer's recommendations as a reference point. The nozzle of a 3D printer is usually much smaller than the diameter of the filament. This means that the filament must be completely melted in order for it to flow smoothly through the nozzle. If the filament does not reach its most optimal diffusion point, the probability of having an obstruction is high.

Make sure the filament is clean: On many occasions, we overlook this detail and it is very important that the filament is kept clean at all times. Dust or dirt in the environment can adhere to the filament. These particles will burn and eventually accumulate inside the nuzzle and cause possible clogging. A good practice is to fit a dust filter to collect all the particles before the filament enters the extruder. In the portal, you will find some examples that you can use.

Keep the nuzzle at the proper height: It is very important that you make sure you have the proper distance between the nuzzle and the bed. Having a very high nuzzle will prevent the plastic from adhering properly to the bed, as it will dry out prematurely. On the other hand, having the nuzzle that is too low will not allow the filament to come out smoothly and continuously. Also, make sure you have the printer bed properly calibrated.

Brush the nuzzle after every print: This may not do much for you if the clogging is severe, but it's good practice to keep the nuzzle area clean. On many occasions after each print, you will leave plastic residues. One way to keep it clean and remove excess material is by using a soft wire brush.

Push the clogging with a pin: If you are lucky and the problem is not very serious because it is only slightly covered, you can use an acupuncture pin to try to clear the hole of the nuzzle and thus be able to make the filament come out without problems.

Inconsistency in the diameter of the filament: It is possible that depending on the filament or the manufacturer you will run into some problems of this type. Depending on how the spool of filaments was manufactured, you may find that the diameters according to the manufacturer's label are not exactly correct. For this, you will have to measure with a caliper in different areas of the filament to make sure that the filament really has a consistent diameter. But for a better printing experience, try to use high-quality filaments.

Make sure you have a spare nuzzle: As much as we give them proper maintenance on a regular basis, we must not forget that they are wear parts and after many miles, they begin to give printing problems. On many occasions, just by changing the nuzzle for a new one, you will avoid some headaches.

I hope these steps will guide you in case you have a similar situation. You can make the recommendations preventively to minimize the possibility of having a clogging.

And how have you solved your clogging problem with your prints?

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