Tuesday, September 22, 2026
Square and Hello World, but not like I intended.
Cut to the chase. Have this wondrous bit of psychedelia:
The writing is 250μm across. That's meant to be a 100μm square at the bottom, but obviously I need to work on something. The lines are approximately 10μm thick. I think they're about 50μm high but don't quote me.
How? You may ask. Well Diffraction Limited did this video where they used their very high tech 3D manipulator to 3D print using a 4μm optical fibre and a UV laser. I don't have that stuff. But thanks to a helpful donation to my Ko-fi account (hint), I could get some cheap 9μm fibre and I do have a 1W UV LED. Now you'd normally use some kind of fancy coupler to connect the fibre to the light source. I, uh:
Yah. The other end of the fibre, obviously needs a high precision connection to the μRepRap which..
..kind of degenerated into a couple of zip ties. None the less, if I smeared out a layer of resin, set the movement speed to 1 micron per second, and did about 10 circuits , I could set up 50μm or so of resin in a 100μm diameter cylinder:
So there's my 100 micron minimug. Got to run. Hope you enjoyed.
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Very, very cool! - reproducing DiffLtds work with the RepRap Micron. I can see uses for this technique in the FPath project as well.
On a total budget of ten bucks too. It's a path I'd considered and rejected because it didn't scale down. However, it obviously grabs people's interest, so I thought I'd better do it too. Particularly if it only sets me back $10.
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