Fixing the 3D Doodler

Ever since we got it a year ago, we have been fighting with our 3Doodler, a glue-gun like pen that allows you to "draw" in 3D by extruding plastic like a 3D printer does. To be fair, most of our problems stem from our use of a cheaper filament instead of buying it from WobbleWorks, the makers of the 3Doodler.  We are a maker club though. What do they expect? After all, our unofficial motto is "It still works..." (said in an indignant tone of voice).

[Teacher note: Or, maybe it's always broken because they are energetic middle school kids...]

Going back to the original point, we tried many tricks to try to fix our 3Doodler. They ranged from shoving a poke-thing up it, to holding it upside down and saying an incantation (it did improve the situation) and were affectionately termed juju-magic.

Then, while in desperation at the East Bay Mini Maker Fair I tried switching to using positive reinforcement while talking to the 3Doodler, I learned that earlier my friend had taken it apart as a project to try and fix it (see pics below).  He told me that when our filament, curved from the spools it comes on, was shoved in our 3Doodler (it wasn't my fault...) it over time bent the internal tubing.

Because of this our filament was catching as it went in, frequently jamming. We had the idea of bending the filament to straighten it, thus decreasing the chance of it catching on the bent inside of the tube. With this small modification, and despite the bent inside of the tube, our 3Doodler runs perfectly.

Now the moral of this is either just pay the money and it will work, take apart your expensive stuff, communication is key, or always tweak. I personally prefer the last one and I know many of my fellow BPC makers prefer the second, but for some reason a few of my fellow students prefer the third.

- Daniel, 8th grade