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I have had the stopping problem several times. My Max is on a UPS with filtered sine wave output. I was printing a complex object in PLA which was to run for 26 hours. It stopped dead after 24 and while the LCD comes on after I turn it on it is completely unresponsive. The USB interface is also completely unresponsive (my usb cable has 2 ferrite cores on either end). MatterHackers support seems stumped. I bought this as a pre-assembled unit. I am quite frustrated with this unit. A timing belt broke after a week (it looks like the whole length of the belt was coming apart, how did they not notice?) and the stopping abruptly for no reason has caused me hours of anxiety. Any ideas?

Was the printer connected to your computer while it was printing? Were you printing a file from your computer, or from the SD card?

PS. Mattercontrol sucks.

I was printing from Astroprint. MC can't handle the large file I was trying to print and I don't want to dedicate my iMac to the printer for such long jobs. But I have had the printer stop when I was printing directly from an SD card as well as from my iMac.