I am having some troubles with my Original Prusa i3 MK2 and getting the Marvin print to turn out good. The Printer was a kit but calibration says that everything is perpendicular. Belts and everything are also tensioned, I don’t believe that something is stuttering.
I am using the Prusa Slic3r version 1.34.1 with default profile settings except the changes on the attached settings screenshot. Furthermore I am using Colorfabb Economy PLA (2.2kg) in white with these temperature settings - 210°C / 55°C
I have completed the print in 100 and 200 microns. 100 micron looks very rough with some layer jumping near the top. 200 looks somewhat better but still very rough.
My PLA live z-adjust is at -0.615 mm. Which makes the first layer look perfectly fine.
I have done another print yesterday, I will upload the result in a few hours. I have reset all my changes in the printer profile and used the default setup. On top of that I have tensioned the belts a little more (Not sure if this had any effect). But the print came out much much better.
Pictures will follow soon as I probably need to tweak it some more!
I would work on a .2 version and get that nailed first before fighting with .1!
Remember temps are going to be one of the big issues on Marvin so printing 2-4 at a time can help. Temp on yours doesn’t seem bad though. Speed may be a factor. I printed at about 20mm/sec but then heat can become a factor more.
I think the settings are close so small changes and one at a time to see the effects of the change.
Some of the problem areas are good on yours like the key chain ring.
I haven’t used slic3r much, but is there a minimum layer time? It looks kind of like the layers aren’t having much time to cool. Try printing one with a cooling tower next to it (print a Marvin and a simple small cylinder at the same height as the Marvin) at the same time and see if that helps. It also looks like you may have some z wobble. Make sure you y and x belts aren’t too tight, as that can cause the same issues. Print a 20mm calibration cube with low infill and extended in the z axis to 100 or 200 as well. This should give you an idea if you have z wobble around a certain height. Once it’s done if there is ringing around 110mm you know that something goes wrong at that height. I had an issue where my smooth rod for the right side of z was a little bowed, and at 140mm it bowed inwards, causing the x axis belt tension to get thrown off, causing some issues. Let me know if any of this helps.
I have finished another 200 and 100 micron print. I believe 200 microns should be good to go now. 100 microns is still weird.
These were printed using the default settings from Prusa Slic3r preset. Temperatures for both are 195°C / 60°C. For the 100 micron version I even included a wipe tower…
I think the white colorfabb pla looks good too using the same settings…
