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

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Yes, I’m being somewhat provocative with that line, but the WNBA Finals have arrived on the heels of what can only be described as a historic season for the league. Across a metric of statistics, it’s clear that America’s interest in the WNBA is at the highest point this century in large part because of Indiana Fever star Caitlin Clark.

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Leading the charge was Clark’s Fever. A little more than 4,000 people attended their average game in 2023, which ranked them second to last. This season, more than 17,000 did, a 319% rise that put them far and away ahead of any other WNBA team and ahead of five NBA teams, including the hometown Indiana Pacers.

We see the same pattern in merchandise. Sales are up 600% from last year. This includes the boost from rookie sensations Clark, who had the best-selling jersey, and Angel Reese of the Chicago Sky, who had the second-best-selling jersey.

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What this high school senior wants adults to know about classroom phone bans
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Handing over our phones during class is an official school policy, and my teachers always make this announcement at the beginning of the school year. But teachers would usually forget about the box by third period on the first day, never to be mentioned again by the second day of school. This year, however, the policy stuck that entire first day — and every day since.
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