In short: when you choose a filament production machine or an industrial filament extruder, don't compare kg/h at the nozzle. Compare the usable kg that end up on the spool within tolerance, the operator time each kg needs, and how quality is measured. If you want to make your own filament, a faster, cheaper machine can still cost more per spool.
Our slogan at 3devo is simple: become your own filament supplier. So it is worth asking what you expect from a filament supplier in the first place. You want every spool within tolerance. You want a fair price per kg. And you don't want to think about it, because your real job is the 3D print, not the filament.
In-house production has to meet that same standard. If it doesn't, you can just as well keep buying filament.
When people compare filament extruders, the first number they look at is output in kg/h. It is easy to compare, so it ends up on every spec sheet, including ours: the Filament Maker X10 produces up to 1.5 kg/h with PLA, which is 2 to 3 times the output of our Filament Maker TWO.
But look closely at what such a number measures. Some systems quote output as the mass of plastic leaving the nozzle, with a note that the filament you actually get may be lower. Plastic leaving a nozzle is not filament. Filament is what ends up on the spool, at the right diameter, round, and ready to print.
So the number that matters is usable output: kg/h at the nozzle, times the share of it that lands on the spool within tolerance, times the hours the machine can run without someone standing next to it. Then you divide the total cost, including your people, by those usable kg.
Every minute of attention a machine needs is added to the cost of every kg it makes. Nobody stands next to an extruder all day. But on a system without closed-loop control, someone walks over every few minutes, checks the diameter and adjusts the puller. Say that adds up to 10 to 20 minutes of every hour. At the 2025 EU average labor cost of €34.90/h (Eurostat), that is real money.
Illustrative example. Operator time valued at the Eurostat 2025 EU average labor cost of €34.90/h.
If such a system puts 3 kg/h of usable filament on the spool, operator time adds about €1.90 to €3.90 to every kg. The Filament Maker X10 needs about one minute per 3 kg spool: 30 seconds to swap the spool and 30 seconds to refill the hopper. That is about €0.20 per kg, 10 to 20 times less.
Over a year it adds up. At 50 kg a week over 48 working weeks, the difference is roughly €4,200 to €8,800 in operator time, every year. And that assumes every spool comes out within tolerance. A spool that doesn't throws away its feedstock and its labor too. A machine with a lower price tag can easily end up with a higher cost per spool.
One more thing to check on any quote: what it includes. An extruder on its own doesn't make filament. You also need cooling, a puller, a spooler and inline measurement. On some modular systems these are separate purchases, which can add significantly to the price. So compare the price of a complete production line, not of an extruder.
Money is one side of it. Time and focus are the other. Take a print farm that needs 50 kg of filament a week. At 3 kg/h that is about 17 machine hours, and at 10 to 20 minutes of attention per hour, roughly 3 to 6 hours of someone's week, spent in short interruptions every few minutes. With the Filament Maker X10, the same 50 kg is about 17 spools, so about 17 minutes of hands-on time, plus starting up the machine.
That difference matters. Unless making filament is your core business, it is a means to an end. The goal is the printed part. A filament machine should not create a part-time job, or pull your engineers away from the work you hired them for.
Swapping a full spool on a Filament Maker X10 that supplies an on-site print farm.
Cost only counts if the filament is good. Filament that drifts out of tolerance means clogged nozzles, failed prints and printers standing still (see our guide to common filament defects). If you produce your own, you need to be sure every spool is right, from the first meter to the last.
The only way to know that is to measure the filament continuously, without touching it, on more than one axis. The commercial supplier MatterHackers explains why. A single-axis gauge measures width only, so oval filament can still pass. Two axes can still pass a square cross-section. In their worst-case example, that square pushes about 27% more plastic through the nozzle than a round 1.75 mm filament. With three axes the worst case drops to about 9%, which is why they measure their own premium line on three axes.
Some systems measure with a contact gauge instead. A gauge that touches the filament reads one axis at one point. It can't see ovality, it can miss small local defects, and it can press into soft or still-warm material, which distorts the reading.
The Filament Maker X10 uses a 3-axis optical camera system. It reads diameter and roundness at 10 µm resolution, with more than 25 measurements per second across its three axes combined. At full speed on 1.75 mm PLA, that is a measurement roughly every 6 mm along the entire spool.
Three axes measure diameter and roundness, not just width.
Because it is a camera, it also sees what a gauge can miss, such as a small blob or contamination on the surface of the filament.
The camera view picks up a small blob on the filament.
An integrated infrared thermal camera checks that the filament has cooled enough before it is wound. Filament spooled too warm can fuse together or deform on the spool.
The thermal view confirms the filament is cool enough to spool.
The measurement data is logged for every spool. The machine stores the last 30 days automatically, and you can export it as a CSV file or a report. So when a customer or your quality team asks about a spool, you have the answer.
Diameter drifts. Polymer flow is never perfectly constant, especially with regrinds and powders or material that has picked up moisture. On many systems, the operator spots the drift and turns a knob on the puller.
The Filament Maker X10 is closed loop. It adjusts the puller speed continuously based on the live sensor readings, so the filament pulls itself back to the set diameter as soon as it starts to drift. No manual tuning during the run. The result is an on-spool tolerance of ±30 µm, measured on recycled PA12 with carbon fiber.
In practice, an FMX10 production run is simple:
Because each spool runs unattended, one operator can look after several machines. Connected to your local network, every machine can be monitored from any browser on a PC, tablet or phone, including how full each spool is.
Before you take a machine to management, ask every supplier the same questions:
A good filament supplier gives you reliable spools, a fair price and no headaches. In-house production should give you the same, or it isn't worth doing. That's why we built the Filament Maker X10 around usable output, not nozzle output: closed-loop control, 3-axis measurement over the whole spool, and only a minute of operator time per 3 kg spool.
Want to see what that means for your own numbers? Run your material, volume and labor cost through our ROI calculator. Or come and see the FMX10 running at Formnext in Frankfurt, 17–20 November 2026.
Written by Timo van der Laak.