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.

Tags: 
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filament splicer

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Anonymous

Bradleytax (not verified)

on

Mon, 05/19/2025 - 06:40

Savery boarded The Canadian on April 1, 2024, in Vancouver. He treated himself to the prestige class ticket, just as he and his late wife had planned.
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As soon as he boarded the train, Savery felt a surprising feeling of contentment. He was proud of himself. And excited for what was to come.
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It turned out Savery was the only passenger in prestige class. The whole front row of the domed viewing carriage was reserved just for him.

But on the second day of the journey, Savery was surprised when he walked up the stairs into the domed car and saw “the back of someone’s head sitting in one of those reserved seats.”

He raised an eyebrow, but didn’t say anything, instead sitting on the opposite side of the aisle from the mystery passenger: a woman with long curly hair, reading.

Savery recalls thinking: “She’s reading a book, so obviously can read the sign that says this is for prestige passengers only.”

But he kept the slightly ungenerous thought to himself.

“I didn’t say anything,” he says today. “And after a while, she got up and left without a word.”
Later that day, at dinner, Savery was sharing a table with a friendly couple, chatting about what prompted them to book The Canadian. Savery told them about losing his wife, about deciding to fulfill their shared dream, solo.

“Have you met Giselle?” asked the couple, glancing at one another.

Savery told them, no, he didn’t think he’d met a Giselle yet. The couple described her — tall, long hair.

“I know who that is,” said Savery, realizing the description matched the woman he’d spotted sitting in the prestige class seat.

“She lost her spouse too,” said the couple. “Quite recently.”

Taking in this information, Savery decided he’d make a conscious effort to seek Giselle out on board the train.

Anonymous

Tammygaw (not verified)

on

Mon, 05/19/2025 - 06:45

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