1The spool is no longer near the machine
When filament comes from a dryer, remote holder, or enclosed cabinet, a long loss-heavy section is already created before it even reaches the printer.
Supporter coupon system
Support development – unlock supporter rewards
Every contribution matters. Even smaller support levels receive supporter recognition, while higher tiers unlock a coupon redeemable on the first RFF product.
0–5 €
Supporter recognition
6–20 €
Recognition + 5% coupon
Most popular
21–100 €
Recognition + 10% coupon
101–200 €
Recognition + 20% coupon
201–500 €
Recognition + 50% coupon
Maximum
501 €+
100% coupon on the first unit
The coupon can be used on the first RFF product.
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Eligibility is approved after supporter verification.
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Smaller contributions also receive a supporter certificate.
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The coupon can be used on the first RFF product.
•
Eligibility is approved after supporter verification.
•
Smaller contributions also receive a supporter certificate.
Support and supporter discount
Did you support us on 4fund?
If you supported RFF development on 4fund, you can claim your supporter discount here. After verification, we will send your coupon code, which can be used on your first product order.
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1
Send these details by email 4fund name, contribution amount, contribution date, email address, and order email if different.
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2
Attach proof A confirmation email or screenshot helps us verify your support clearly.
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3
We send your coupon code After approval, you will receive your unique code.
Claim your discount by email
If you use Gmail, choose the Gmail button for the most reliable experience. For other mail apps, use the default email application button.
The email template is pre-filled. You only need to add your details and attach the confirmation.
The coupon can be used on the first RFF product.
In real use
Not just a concept — the system is already working on a real filament path.
This image shows the full operating logic: the spool can stay farther away, the RFF takes over the mechanical burden of the long path, and the printer extruder receives a controlled, stable filament section.
1
Supports remote spool or dryer setups
The filament source no longer has to sit right next to the printer.
2
Removes pull load from the extruder
The printhead extruder no longer has to deal with long-path resistance by itself.
3
Real-time adaptation
The system reacts to actual consumption instead of running at a blind fixed speed.
Why this matters
The problem is not the filament — it is forcing the extruder to handle the entire path.
When the spool or dryer sits far from the printer, the extruder is no longer just feeding material — it must also overcome friction, bends, and rolling resistance. That is exactly the kind of load most lightweight printhead extruders were never optimized to handle.
A single weak point can ruin a multi-hour print.
The longer the filament path, the higher the chance of inconsistent feeding, grinding, under-extrusion, and total print failure.
2The extruder is not only feeding — it is fighting
Lightweight direct drive and Bowden systems were built primarily for precise material delivery, not for handling the full resistance of several meters of path on their own.
3The failure is not always immediate — just expensive
The issue often shows up hours later: unstable retracts, ground filament, unreliable pull-in, under-extruded layers, or a completely failed print.
Higher pull load
Every extra bend, roller, and bit of distance adds more load to the extruder.
Unstable retract
If the filament path is not controlled before the printhead, retract and restart will not be either.
Costly print failures
On long prints, even a small feeding inconsistency can become expensive.
That is exactly why RFF exists.
In the next section, we show the current prototype and development status through real images.
Prototype views
Current prototype
Development details
Development details
Quick overview
Gallery
