On-site construction of a portable #OpenSource point-of-care low-field #MRI system in #Africa:
- 50 mT #Halbach #magnet
- #3Dprinted & #CNC -milled parts
- #MaRCoS / #RedPitaya #SDRlab / #FPGA -control
https://doi.org/10.1002/nbm.4917
#DIYbio #lab #magnetic #resonance #instruments #NMR #PoC #medicine
Hello people! I've been on the Fediverse for couple of years now, so here's my re-#introduction
I'm Ari, better known by my tag APZ and this is my #pinball repair, #arcade and #retrogaming account. I mostly post about playing and repairing pinball machines, but I also work on #retrocomputing with all the classics.
An IT guy by day, I moonlight as a pinball arcade owner here in #finland with my partner @quester. This is purely a hobby of mine, I do this to keep my sanity and to keep pinball alive for the next generations of players. At the moment I own a bit over 30 pinball machines from 70s to 2020s.
A lot of what I do involves #electronics, #CAD for now obsolete parts and #3dprinting and tabletop #cnc to recreate them.
I love to #travel, usually to meet like-minded arcade collectors. I have a strong preference to #repair stuff instead of throwing it away. I'm a #linux user since mid-90s, having been part of #foss movement most of my life. I also edit arcade related videos.
BFI and CNC Sign Deal to Boost U.K.-France Film Cooperation https://www.byteseu.com/1178292/ #Bfi #Cnc #GreatBritain #UnitedKingdom
It is done. I finished making the CNC machine. It draws circuits on a copper plate, just how i wanted. It is rare for me to finish a project. I'm so incredibly happy about it 
The machine is still in kind of a rough shape. I will make proper power circuit and maybe a bluetooth for serial. Other then that, it is ready to be used 
(Part 7: Finished)
Okay I'm so incredibly excited to show this 
The CNC machine is almost ready and here is a short video of the z axis at work, together with a 3d printed pen holding contraption (courtesy of my friend who kindly printed it for me 
)
I can't believe it works. Now all that remains is the software part 
Credits:
The 3d model used is by tranluan19 and can be found here: https://www.thingiverse.com/thing:5505579
(Part 6)
Am 12. Juli gibt es einen Lasercutter Workshop. Von 15 bis 18 Uhr (open end) zeigen wir wie man mit Lasercuttern umgeht.
Vom Entwurf bis zum fertigen Werkstück ist alles dabei. Du brauchst keine Vorkenntnisse: Wir zeigen dir, was du wissen musst, um sicher und kreativ mit dem Lasercutter zu arbeiten.
Bitte melde dich über Mastodon oder unter anmeldung@makerspace-esslingen.de an.
Mehr Infos: www.essembly.de
#Makerspace #EsslingenamNeckar #EsslingenMaker #LinuxCafe #Maker #Lasercutter #CNC
My CNC aluminum router is now in its new robot box. The controller is on the left, so I can operate the machine with the doors closed. Still need to connect vacuum, air compressor, and lubricant, but getting closer! The motors and sensors are working!
I've spent the past couple hours trying to design a device to perfectly & repeatably polish an asymmetrical pen.
Was thinking threaded rod with attached polishing device following curve translated from distance from central axis + mini lathe(ish) holding pen + gears / belts + …
And then I realized I could just trick the #CNC into doing it by defining an end mill "bit" with the same dimensions as a polishing bit for a dremel.
#makers (in the US) Open Builds is going out of business and selling everything at a really good discount. There isn't a lot left in stock but I found a few useful things.
( #CNC & #3DPrinting related stuff )
I swear I wrote a gcode generator and put it around here somewhere... can't find it now... Guess I'll write another one. Hahaha...
This is my "robot box" as I tell my 3-year-old. Added acrylic side and top panels to my CNC aluminum router enclosure (in progress). Added french doors to the front.
Consensual non consent, anal
Wouldn't you like to know what's inside a DM420Y "digital" stepper driver? I did too!
https://www.moseleyinstruments.com/blog/stepperdriver/
The PCB Router You Wish You Had Made - The advent of cheap and accessible one-off PCB production has been one of the pivo... - https://hackaday.com/2025/06/14/the-pcb-router-you-wish-you-had-made/ #pcbrouter #cnchacks #cnc
Got the basic framing parts for the enclosure for my CNC aluminum router. It's 3' x 3' x 2' with a front door. It has an 1/8" aluminum floor. I'll need to cut it down a little to size. I have parts for a top door coming. Also, I'm thinking of splitting the front door into two sides for less leverage and less space required for opening.
Klein und günstig： Eine CNC-Fräse für den Schreibtisch
Wiring placed on a prototype board. Both axis move!
I've run into problems initially, because the second chip wouldn't work no matter what I did but i finally found the issue. It was because arduino nano i'm using, specifically it's pins A6 and A7 𝗮𝗿𝗲 𝗮𝗻𝗮𝗹𝗼𝗴 𝗼𝗻𝗹𝘆 and to drive those chips, you need a digital signal. It took me an embarrassing amount of time to figure out and an unnecessary disassembly and assembly of the board. Hopefully this post will save somebody some debugging
(Part 5)
I've got movement!
I roughly connected one bridge to one axis to see if it would move at all and look at it! Look at it goooo 
I feel reinvigorated, I think i might actually be able to finish this project. Next up is putting all the wiring on a prototype board
(Part 4)
just came across https://grid.space/ today and it’s not going to be the best in class of any of the apps it provides in terms of functionality and polish but it sure is a powerful set of overlapping functionality in a relatively comprehensive appearing package with some high nerdery under the covers (e.g. https://grid.space/kiri/engine.html)
if you’re into #3Dprinting, #lasercutters, or desktop #CNC and might want to use a fully browser-based web app to prepare files for your machines take a look.
justada 
