Filament Splicer

Project cancelled, click here to read why
The idea for Filament Splicer was born about a month after our Ultimaker 3D Printer was build. As cool as 3D Printing is, printing in one color is boring.

Users of normal, single head FFF/FDM printers are stuck with single color unless they join filament pieces together to produce one multi-colored string. It is not very complicated but process is quite awkward and you will get fed up very quickly.

If you want to have proper, stable filament join you need to have right temperature on the tip of plastic when you connect pieces together. This is hard to achieve when you use some arbitrary heat source. You either underheat or overheat and burn the plastic. Using print head of your printer is best 'ad-hoc' solution but it leaves quite a mess on it, you cannot print when you splice and plastic which is in the head slowly gets burned while you take time to splice your string.

Then, of course there is issue with forming of the joint, carpet knife and fingers where our favorite tools for that job but it took quite a long time to form each joint.

We have had our share of failed prints due to broken joints / stuck filament and finally decided to create a device which will help to splice filament. Initial idea was to create fully automated unit: you place filament ends on copper block, close it, push the button and viola - you have your joint. That was the theory.... In practice this is impossible because PLA and ABS expand during heat-up and contract during cool down, this results in either no joint at all or bubble-filled mess.

Many headache filled days [Even best PLA is really nasty stuff when you breath it in for a while] later we dropped the idea and went for 'open' model with precisely manufactured grooves which help to quickly heat up, connect and form joints.

Thermal insulation was another challenge, we wanted to allow up to 260c temperature but nothing could properly insulate enclosure from hot copper block for prolonged period of time. Ceramic fiber thermal tape can take that heat but one needs a lot of it and then there is itching... Chinese tape is horrible and even best branded, made in USA [ThermoTec] tape is not flawless. We eventually gave up on ceramic fibre and went with PFTA [Teflon] plates. Since PFTA can be outright poisonous at high temperatures, we decided to use high quality - made in Europe material - this way we are sure that maximum temperature of 235c is well within safety limit.

Availability

Filament splicer can be pre-ordered via our campaign on Indiegogo, it is available as a DIY kit or fully assembled unit.

 

Assembled
Assembled
Kit
Kit

 

Open Source

Filament splicer blueprints are released under Creative Commons Attribution-NonCommercial 4.0 International License and can be downloaded from Thingiverse and Youmagine.

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filament splicer

21967 Comments

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Mon, 02/10/2025 - 01:34

Thieves blow up museum door and steal ancient artifacts, including 2,500-year-old gold helmet
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Thieves have stolen four ancient artifacts, including an approximately 2,500-year-old gold helmet, after using explosives to break into a museum in the Netherlands.

The daring heist took place at Drents Museum in Assen during the early hours of Saturday morning, according to Dutch police, who said they received a report of an explosion at 3:45 a.m. local time.

CCTV footage released by police shows the suspects opening an exterior door before a blast sends sparks and smoke into the air. The thieves made off with three gold bracelets, dating from around 50 BC, as well as the 5th-century BC Helmet of Cotofenesti, a historically important artifact on loan from the National History Museum of Romania in Bucharest.
The items were part of an exhibition about the Dacians, an ancient society that occupied much of present-day Romania before being conquered by the Romans. On show since July, “Dacia: Empire of Gold and Silver” featured treasures borrowed from institutions across Romania.

In a press release on its website, Drents Museum described the Helmet of Cotofenesti — which was discovered in a Romanian village almost a century ago — as a “masterpiece.” Its design features mythological scenes and a pair of eyes, located above the wearers’, that were thought to deter enemies during battle while protecting against the “evil eye.”
The exhibition was set to conclude Sunday, though Drents Museum remained closed through the weekend due to the robbery. Its premises were damaged by the explosion, though no injuries were reported, the museum said.

Dutch police announced that they are working with global police agency Interpol and had, as of Sunday, received more than 50 tip-offs. Investigators are currently looking for information about a gray car that was stolen from the nearby city of Alkmaar earlier in the week and was discovered around four miles from the crime scene, on fire, shortly after the overnight heist.

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Mon, 02/10/2025 - 01:42

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Mon, 02/10/2025 - 03:24

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Country music star Carrie Underwood is slated to perform “America the Beautiful” at President-elect Donald Trump’s inauguration, according to a copy of the program obtained by CNN and confirmed by a spokesperson for the inaugural committee.

“I love our country and am honored to have been asked to sing at the Inauguration and to be a small part of this historic event,” Underwood said in a statement to CNN. “I am humbled to answer the call at a time when we must all come together in the spirit of unity and looking to the future.”

The presidential oath of office will be administered by Supreme Court Chief Justice John Roberts with Justice Brett Kavanaugh expected to administer the oath of office to Vice President-elect JD Vance.

Trump’s inauguration as the 47th president of the United States will take place on January 20 at the US Capitol.

Underwood is a big get for Trump’s inauguration, considering Hollywood’s Trump blackout over the course of his political career.

In his first term and throughout the past three elections, Trump has struggled to garner support from major Hollywood stars. At the Republican National Convention last year, the two biggest stars onstage with Trump were musician Kid Rock and retired WWE wrestler Hulk Hogan – a far cry from a superstar at the height of their career, like Underwood.

The Grammy-winning artist is as high-profile as you can get in country music, not only with numerous platinum hits, but also with public-facing, mainstream business associations. Underwood is the face of Sunday Night Football and is set to make her debut this March as a judge on ABC’s “American Idol” – the singing competition show that catapulted her to fame when she won in 2005.

While many NFL fans will likely applaud Underwood for singing at the inauguration, any time a celebrity aligns themselves with Trump, they run the risk of alienating left-leaning fans and Hollywood allies.

Underwood has kept her politics under wraps over the course of her career. In her statement, she did not mention Trump by name and kept her focus on unifying the country – still, Underwood’s decision to publicly align with Trump is a big statement for any star, particularly one as private as the singer.

Historically, Hollywood has always been closely associated with the Democratic Party, but country stars have always been an outlier, leaning more conservative. In recent years, as new singers join the genre, country music has gotten to be more progressive. This past election cycle, country stars like Mickey Guyton and Maren Morris stood with Vice President Kamala Harris.

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