I recently purchased a Mini 1 from a craigslist post. The original owner had it for a year, printing ABS just fine until he switched to PLA and has had issues since, hence the acquisition.
After troubleshooting a bit, Here’s what I’ve done and what the printer is currently doing.
1.Downloaded latest Cura and updated the printer’s firmware.
2.Ensured the correct printer is selected in Cura.
3.Heated the Hot End and extruded any remnants PLA/ABS in the hot end.
4.Manually controlled and tested bed/printer functionally.
5.Attempted to print rocktopus, but printer fails to bring hot end to proper temperature even though I can manually set it to 220C and printing never begins.
I’ve taken the printer assembly apart and reinstalled everything. After plugging everything in, it responds well, extruding happens, can set the hot end to any temperature. Once I load rocktopus, it starts to bring temperature up but stops several degrees before and nothing happens.
My co-worker believes this might have to do with a thermistor that needs to be replaced. He also has a mini 1 and has experienced similar problems. It wasn’t until he replaced the thermistor were his issues resolved. I’ve looked for a thermistor but they’re not very easy to find. I’ve thought about letting LulzBot fix whatever is going on with this and send me the bill, however, before I do that I’d like to ask the community and their thoughts on what I can try.
Thank you all!