(update: killed the counterweight; CNC Kitchen video)
Even though the Minamil is minimalistic, the part quality Paul can achieve with it blew me away!
"I'm frankly shocked by the quality of the parts coming out of this" 11:54
(mocking the style of over-hyped package labeling, in case that got lost in translation)
Many of the images and videos here show a big counterweight rigged off the side of the side of the little machine. But nevermind. That's just (7 July '22) become history. Fresh rev of the Z axis does better with less. Yay for maximizing minimality!
This little CNC mill works well enough to produce an eye-candy demo video:
(that's a "new" (June 2022) demo vid; here's the first eye candy demo)
...and mill fine-pitch circuit board traces:
What little CNC mill?
Minamil: a minimal CNC mill
First there was #CDCNC, a highly-constrained just-barely-functional one-off toy built by improvisation with found junk and simple tools.
Here I'm developing an idea that came from thinking about whether or not there is any space between a dumb stunt like CDCNC and a commercially (i.e. efficiently) produced entry level CNC mill/router. Early results seem encouraging.
In contrast to CDCNC, this is about reproducibility from a simple BoM, economical access to laser cutting, and instructions for building your own sub-mini CNC mill.
Next there may be #"Desk Accessory" CNC Milling Machine. For progress in that direction, with not much more effort in the frame+enclosure department:
(different Z axis in those two pics - part of the not-quite-so-minimal "and friends" part of the project title that I haven't written much about yet)
Telescoping axes allow the enclosure to fold up smaller when parked and expand for operation:
Selected Log Entries
- Parts source / cost notes
- milling PCB (so... MCB?)
- milling aluminum
- material removal rate (MRR) in acrylic
- uh oh... unexpected trouble with self-locking leadscrews
- how it works (could use some updates re later learning)
- compact & convenient packaging
- building blocks: the slide sub-project
- trying intentional interference -- which has worked so far
- first assembly (the eye-candy video)
- first part
- first try with XY & Z
- HaDPrize 2021 Challenge 3: not selected 😞
- HaDPrize 2021 Challenge 5: selected 🙂