I bought a Kossel Mini DIY kit on aliexpress. It worked surprisingly well after putting it together and calibrating it.
After exactly a week and 10 small/medium prints the printer started acting weird.
If I connect only the USB cable I can connect to the printer as normal and temperature readouts start showing up on the PC (I use Repetier-Host). All seems fine. The LCD screen is turned on by this point, but a bit dim, and updates as well.
If I then connect the main 12V power the printer stops communicating with the PC. The LEDs that blink with each packet to/from the PC now constantly lit. The LCD gets lit up more at this point, and keeps refreshing with temperature readings.
If I connect the main 12V power from the beginning I can't connect to the printer at all. It just enters the error state immediately.
This first happened last weekend. After disassembling everything it started working again. I then put it together and could use it all week, but now this is happening again.
It seems to be something with the electronics, but I don't know how to proceed in debugging this. Anybody had a similar problem? Any ideas on what I can do to investigate?
