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Agreed. We've had a lot of no shows and bad quality work on folks coming to our 'new to us' house as well. I'm learning about those impossible files too. No all are made for 3D printing. But I'm learning! I'm on a mac, but I used onlinestlrepair at one point during this saga. I never figured out if it worked due to the memory card, but I have the site saved for future fun!

I guess you could 3D print a nice bathroom if you have a LOT of patience. 😉 Confirmed that my SD card was just buggy enough to work sometimes and not other times. I formatted it and all is now well. I thank you for the debug. I learned more about the process by doing this. And yes, a backup SD card and card reader are already on the way. Silly to have a $200 printer fail due to a $10 part. I'm actually on my second printer. I suspect now that it was the same root cause. So Monoprice had to pay for return shipping + shipping of the new printer.

Greg, I think I've narrowed down my problem to a hardware issue. Don't knock yourself out too much at this point. So frustrating!

Thanks for the attempt. I uninstalled Cura & reinstalled. I added a new printer and used your startup code. Temp set to 210/50 as suggested. File seems to indicate all those changes successfully, but still no luck. When I select a canned file, it tells me filament=PLA, time is 20 minutes, etc. When I select FarynGreg, there is no information. If I select to print anyway, the machine restarts. FarynGreg.gcode

Thanks Greg. Attached is a small canned file. CatRing.gcode

I'm a lifelong geek, but new to 3D printing. I've read through the forums and have seen several folks with similar issues, but none of their solutions work for me. I have a Monoprice MP Mini Delta V2 3D Printer and can’t print much more than the canned files that came with it. I’ve downloaded free STL files from several sites and very few print. Ultimaker Cura (4.11.0) says they aren’t watertight or sometimes there is no warning. I’ve used X-Ray view and installed Mesh Tools and fixed holes & models. Slice works, but the printer just eats the Gcode and restarts. I've tried downloaded tools like Meshmixer and online tools like https://tools3d.azurewebsites.net/ and https://formware.co/OnlineStlRepair. Some identify problems, but no "fixed" files work. Attached is source STL and failing Gcode. Any help would be appreciated! Again, this is just one of many files that fail. Faryn.stl MPMDV2_Faryn.gcode