My experience. What has your experience been like? and maybe help?  

My experience. What has your experience been like? and maybe help?

I only have the MK3S+, MK4S, and XL. I use them at work and print a lot of prototypes. All 3 have minor failures and epic failures! From not sticking to the bed to the hotend breaking off and melting through the fan!

Each printer has features that I love! The MK3S+ has crash detection which will re-align the print head each crash and if too many crashes. It will wait for me to fix it. This feature alone has saved 100’s of prints!!! But the MK3S+ also has a “faulty” filament sensor. Which Prusa tried to fix in its “S” and “+” upgrades. Meaning, I start a print and come back later to “air printing”. Because I turned OFF the Filament Sensor. Because if the sensor is on, it thinks there isn’t any filament every few seconds and no printing gets done! Then I re-print the hotend housing and clean everything for a few weeks of filament sensor on. Which is great when I am printing a 3+ day print or a bed filled full of parts. I am not afraid to start this printer and come back the next day. I also, tell any friends that are looking for a 3d printer, to buy this one!!! It is the most forgiving of the three printers and the availability/cost of parts is also a plus. I have also noticed that this printer does great with PLA and PETG. But Silk and glittery filaments tend to fail.

The MK4S prints like a dream!!!! And if it finishes a print, that print will be spectacular!!! I love the Screen that shows my print and progress. I love this machine! I did upgrade it to “S” but I find the extra speed to fail prints faster than without speed. Sadly, I baby this printer the most. I will even pause a print until I come back. Because I know, once I leave the room the printer will fail. When I hear the thud thud or Clunk sound, it has failed! I have learned to not print for longer than I am at work OR multiple objects at a time. These conditions fail often. Oddly this is my favorite machine for all the other features. And one of these days I will be upgrading to the Core One or will have another printer. I am waiting for crash detection. I assume that once they figure out this issue, that this printer will become the King of all printers! Because it prints all materials that I have thrown at it, it makes beautiful prints, and it’s easier to use than the others. I assume the Core One which is just the MK4 in a box makes it all the better!

The XL (2 head) has been interesting. It is rugged and will print for days and will print lots of parts with a low failure rate. But it has issues like; Hotend 1 or 2 not finding home, air printing because the filament sensor failed/the filament got jammed at the top of the hotend/the E motor decided to stop printing ¾ through the print, and several times the hotend has busted off. It looks like it lost some Z steps and rammed into the print over and over until it broke off. This is the one that melted one fan and the filament coming out of the cut end came around and broke a few blades of the other fan. It’s a good thing this printer has two heads because I had to retrofit Hotend 1 to continue printing. This printer also doesn’t have crash detection but it doesn’t fail as much as the MK4. Also, the bed tiles should be on all the prusa printers! Because I can print anywhere on that large bed without “dead zones” or leveling issues or not sticking only at the upper right hand corner. It’s magical! Also, it took a while, but I do like the weird enclosure thing. The accordion that opens the entire bottom of the printer. It makes it easy to clean all the debris that lands down there. I also print a lot of PC parts with Microenvironments. This is the only printer that does that very well. I am hoping the Core One will also do this well!

Has anyone else had some of these issues and fixed them? I know that I am always behind on the nomenclature and I don’t know what things are called to find the issue. So any help in that regard would be nice. Thank you all for reading this long thing!