The significance of filament runout sensors – Bestgamingpro

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Fused Deposition Modeling (FDM) 3D printers, commonly known as filament 3D printers, come in different fashions at different costs and with many different options.

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The function we are going to talk about is the runout sensor. As you may be thinking, this sensor will tell the printer when it runs out of filament.

This may not be necessary on printers with a smaller design space. That’s because with a printer that may not print particularly heavily, you will run out of filament spool.

However, what about massive printers with massive design areas? It’s entirely possible that you need to print something that can hold a few spools of filament.

Filament is sometimes available in 1 kg spools. Sure, there are smaller coils that are accessible, in addition to larger ones, but larger coils are likely to become unwieldy. Don’t forget that the spool needs to unwind in order to feed the filament. The larger the coil, the better the pulling pressure required. In addition, the larger the spool, the larger the spool holding device required.

I would like to consider one of my printers loaded with ColorFabbs PLA Economy White, which comes in a 2.2 kg spool. It’s handy for some of the bulk prints I do for some of our household chores.

That means 90% of the time I use a 1 kg spool. Since the attached video has exhibits, a 1kg spool would not hold enough filament for some prints.

The problem is, many printers don’t know when they’re running out of filament. You just pull in the filament with a gear mechanism. This mechanism does not report to the printer again. It just feeds, melts, and extrudes.

However, some printers have a sensor called a filament lay sensor or a filament break sensor that indicates when a spool is empty or when no filament is being fed. These sensors report to the printer’s internal processor again. When a hit is reported, the printer will knock the printhead away from the print and let everything calm down until you change the filament.

If you load a brand new spool and thread the filament using the extruder, you can let the printer know to continue. If everything works, the pressure will pick up where it left off.


Aria the Dragon ran out of white filament, so a little bit of silver filament really completed her wings.

The printer in the attached video is the $ 6,000 Ultimaker S5. However, you don’t want a super-expensive printer to have a runout sensor. The Creality Sermoon D1 is a tenth of the value at $ 599, but it also has a leak sensor. Stand ready. I will quickly get a full review of the Sermoon D1.

Even if your printer didn’t have such a sensor, you can usually add one. I connect to a $ eight BIQU sensor that you can add to most printers.

Usually I can work pretty well with the cutting program to estimate the amount of filament I want for my prints. However, I have found that I rely on concentricity sensors, each used for huge prints and for coils that are just near the end, as was the case with my print of Aria the Dragon.

My reasonable recommendation for 3D printing is straightforward: If you happen to buy a brand new 3D printer, get one with a filament runout sensor. If you don’t already have one, see if this can be added and invest a few dollars to upgrade your printer. It is a reasonable improvement that any money and time can prevent.

What’s your favorite feature for 3D printers? Do you have a leak sensor? Do you have a 3D printer? Let’s discuss 3D printing in the feedback below.

You can watch my daily challenge updates on social media. You’d like to watch me on Twitter at @DavidGewirtz, on Fb at, on Instagram at and on YouTube at

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