Problems / Tweaks needed after first couple prints
Hey there,
I'm not entirely new to printing, maybe 6 months with an Ender 3... which was good training, learning how to balance bed, adjust the Z height (constantly), set temps, etc. So I'm an advanced beginner.
Mk3S is assembled, looks good, and it passed all the calibration tests. I wound up with a Z height adjustment of about -1.275 needed when printing which seems weird, just noting for now. I loaded up some generic matchbox PLA and printed a g-code file I've printed on the ender many times.
First problem I have is that the extruder is laying down a lot of melted filament that I try to keep cutting off, but. When it starts printing and calibrating, when it hits the bottom of the 9 points it jams the extruded blob around the nozzle (probably 50 out of 52 times I've printed) which leads to me chasing the blob, trying to swat it off while it lays a brim. Each time. One time, got too bad, had to stop and clean it entirely. Never had to do that with the ender...
The real problem I'm having is printing corners. When it makes a turn, it hops, and creates a crappy line after the hop - the corner itself has an actual bump in the line it's laying as well (see pic). Sometimes it'll jam the filament back onto the nozzle head when it hops and I have the whole messy nozzle situation again. It appears to be on the horizontal side, when printing from left to right after making a bumpy turn. My Ender was doing this as well (although this is harsher). Any ideas?
Rob.
RE: Problems / Tweaks needed after first couple prints
This is what the first printed like. Corner is clearly jacked up. From the first curve on, it was laying a blob in them.
RE: Problems / Tweaks needed after first couple prints
Made some progress this morning with the hopping, bumps on the corners. I guess that it's related to the belt tension, so I loosened the screws for the x axis as we did in the manual, rotating it - the top of the belt was very tight, the bottom was loose I think. So after tweaking so it's uniform and as a result, just slightly looser - 3 of the corners appear to be printing great. The 4th, the bottom right one, is better, but still has a little bump to it that's noticeable but not destroying the print. Any ideas on why that would be?
I also am noticing that the temps that I went off of for specific filaments with the Ender are different with the MK3S, the Prusa runs hotter more consistently, so I just have to fine tune and get used to it. No problem. The samples I attached were way too hot and melting once laid down on the bed.
One more question - I'm very used to Cura now from learning it with the Ender. I (think..) I love it, do I need to adopt the Prusaslicer? I think there are specifics that about Prusaslicer that are tailored for the MK3S that I may not be able to do in Cura, but I'm guessing. I would like to take full advantage of the MK3S features as they exist? Any thoughts?
Now that I have a Z setting and the bump mostly solved it's printing something fairly large and it's great. Very quiet, love the auto bed leveling piece of mind and the feeding / unloading of filament.
Hopefully someone can help me out with my remaining corner and question re the blobbing when warming up and slicer?
Thanks again -
Rob.
RE: Problems / Tweaks needed after first couple prints
I notice you say 9 points, try turning on the 7x7 mesh bed levelling for 49 points from the lcd menu. You get a better mesh map that way.
RE: Problems / Tweaks needed after first couple prints
@neophyl
Thank you, will def do that after this print is finished, think that'll have something to do with the bump? As this print continues, (1.6 Z now), the bump on the left corner seems to be gone entirely, seems it was just there during the initial couple of layers...
I looked through the settings some more and found the XYZ calibration report. Perhaps they say something to you knowledgeable people:
Measured Skew: .04
Point Offset: -1mm X, .41mm Y
Belt Status: X: 239, Y: 269
Thanks,
Rob.