Some doubts setting up for 5 printers farm
I am planning to set up a small priners farm with 5 printers and before buying the parts I was wondering if you could help me with the setup, as I am having some doubts on the required parts and found not much info.
Parts would be:
5 x Ender 3
1 x Raspberry Pi 4 8gb Ram
1 Powered USB HUB
Setup would be plugin all the printers to the hub and the hub to the raspberry pi?
Can I run klipper firmware on the printers or would that be to much for the pi?
In the last few months of using it, there was only one time where I had to reboot it, but it was caused by the printer messing up the communication after an aborted print, which caused Windows to think that the USB driver was the cause and killed communications to the other printers running that same board.
Also, just an FYI, if you are running an SKR 1.4 Turbo, it does NOT work with the Pi 4 8GB. I did extensive testing on this, and made the Adafruit dev team aware of this. The Pi will not boot up if more than 1 of those boards is plugged in, and while you can plug in more boards after the Pi boots, the Pi will eventually kill communications with *all* printers once a print starts. I ruled out everything, including trying a new P4, formatting the card, reinstallations, etc. The only solution that stuck was replacing the board with something other than the SKR 1.4 Turbo (instead using the 1.2 Pro).
Overall, if you're planning on running a farm, you can use multiple Pis, but if you plan on getting enough printers that you need 3 or more, consider getting a Mini PC instead (personal minimum recommendation i5 12GB).
Thanks good information. Pi is in deed not the best choice for a farm in the long run I think. sd cards like to fail sooner or later and it is very picky about power problems. So if you run them really for money a better PC might safe you in the end some money if you go with a small/older pc running linux (our favourite cause windows 10 especially likes to reboot after updates).
@nicodarg It does not matter where you connect the printers, but pi has only 4 usb plugs so you need a usb hub. When printers draw current often an active hub is used, so you get less power problems on pi. That is why I suggested to tape the 5v pin on usb cable so this does not happen.