This instructable is for a 3D Filament Fuser/Welder/Joiner to join 2 pieces of 3mm 3D Filament together.

Step 1: The Heating Element

Take a hair straightener (25mm wide) that can heat up to 230°C. Mount this on a stand to keep the straightener from moving around all over the workspace.

<p>That's great, and hair straighteners are much easier to find at the thrift store than a hot-end (like in other designs I've seen). Gotta try this</p>
Definately agree, better to use everyday available materials, and is a bonus when it works well too.
<p>Why not cut the PTFE tube in a spiral so that it can be removed when joining two spools?</p>
<p>Loss of rigidity would probably negate the selected interior diameter of the PTFE tube.</p>
<p>Hi Zaphod, you are right, as soon as you cut the PTFE tube, you loose the rigidity thereof. When trying to then join the filament, the PTFE tube flairs open, leaving you with a spoiled joint.</p>
<p>How about placing the spiral cut or maybe just sliced length ways, in a split metal tube?Slightly more complicated but removable. </p>
I think any cut that you make will also decree the ID, it might not be a big enough difference to mater but maybe it would. Most filaments specify a tolerance of 0.05mm. If you have a Bowden set up you could just leave the tube on, it won't be able to go through to the extruder wheel. At least not on my printer, could be different for you. I think the lengthwise cut would be better than the spiral. But might cause the same problem.
<p>Very cool idea.</p>
<p>Thank you.</p>
<p>Good idea. Then you can just seamlessly go from one spool to the next.</p>
<p>Works perfectly.</p>

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