If the holes don’t line up for your supply, just use some foam double sided tape. I opted to use only one fan, blowing on the Raspberry PI but I included mounts for a second fan if further case cooling is desired. Plug the Relay board into the Raspberry Pi and secure.Mount the Raspberry Pi using 4 screws (Again, size appropriately, but I used screws I had laying around.I used small (3/8in) wood screws I had laying around. Screw the 2 AC plugs, the one with only a fuse and the one with a fuse and switch into the back case.Snap the 3 AC sockets into the Back plate of the case.Both are sized to fit on a typical 200mm build plate and was easily printed on my Ender 3 (V1) BuildĪfter ordering and printing the parts assembly is pretty quick. You will also need filament to print your case and the normal random bolts and screws for assembly. I headed over to Amazon and sourced out what I needed. I picked up this A/C plug-in current sensor from Amazon for only a few bucks:ģD printable files can be found on Thingiverse: Multiple 3D printer Controller, one Raspberry Pi by Hawking – ThingiverseĪs per my usual method, I scrounged through my junk drawer for parts but came up pretty empty. Before proceeding I opted to do a little science. I had never done the math, but I knew I was getting close to maxing out the circuit. For years I have been running two printers on the same 15 amp circuit as the rest of my general office equipment (Computer, Monitors, Lights, etc). This last requirement (draw from different A/C lines) was created out of necessity. Allow different printer’s power inputs to draw from different A/C lines.Control power on/off for each printer independently.Control printing operations of at least three 3D printers with one Raspberry Pi.Requirements:īefore really setting my teeth into this project I clarified my goals. I salvaged a Raspberry Pi from one of my existing printers and was able to build up the rest of the server for less than $40 USD. I decided to go for it and was blown away by how simple the whole process was. This was definitely the easy button option. Browsing around the site I also found that a ready to go Raspberry Pi image was available for download. The free version could control up to 5 printers, allows for custom I/O operations, custom event driven G-Code and much more. ![]() This little software package was exactly what I was looking for. Honestly though, I just wanted to print and avoid as many headaches as possible, so I kept looking. ![]() I found this could be done through some clever hacking, containers and dockers. I started by looking at running multiple Octoprint instances per Pi. I picked my jaw back off the ground and went looking for a solution that wouldn’t cost half the price of my cheapest printer. It is then that I discovered that the supply shortages of the last few years (circa 2022) had driven the price of a Pi well over $100 USD. So, when I got my 4th printer, I headed to my usual sources to get another Pi to act as a server. With each new printer came a new Raspberry Pi. Like most of you I have been controlling my 3D printers with Octoprint for years.
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