Prints suddenly failing - Need some Help
I have been printing some batched parts on my Prusa Mini with little to no issues for awhile. I had just finished printing up 200 parts, and switched out the file to the next part I needed 200 of. These are files kept on the SD card that I've printed on and off for over a year with no change. But for some reason now I'm running into issues. I am not super knowledgeable about 3D printers, so was hoping someone could look at these images and give me some insight into what the problem is. I threw links to the photos below.
I have tried tweaking my Z-Height, ran the first layer wizard a few times. I've cleaned the plate with acetone a few times. Purged the nozzle a bit, but no luck. I also tried slowing down the speed 65% just to see if that helped and it didn't. I'm printing with Overture Black PLA at 215c and 65c bed temp. Any help would be greatly appreciated.
RE: Prints suddenly failing - Need some Help
Hej arttyiv,
I will give you my opinion for your problem, but if its not the solution please post some pictures from the bottom view ob your prints.
I think your problem could be the Z-High. For me your nozzle seems to be a bit to close to your bed. May lift the nozzle (via Z-Height-Calibration) for 0,04 to 0,055mm (or may a little more)
And my other clue is your printing-speed is to high. I´ll print the frist Layer with 20mm/sec. If the first layer have many fragile parts I sometimes go down to 15mm/sec.
My Pro-Tip: You can't differ the speed of perimeter and infill for the first layer, so I lowered the accelleration (just for first layer) a bit. (I think to 400mm/sec² or even less) so you could get more lucky with sharp corners and the perimeters.
Do you have your mesh-bed-leveling?
And just to be sure, whats your thickness of the first layer? (I think you should have 0,2mm (like default)
Good Luck and greetings from Germany!
J.P.
Greetings from Germany!J.P.
There are visible smears on your pirnt sheet - if acetone is not shifting them it's time for a drastic detergent clean - rub neat dishwashing detergent (Dawn/Fairy) into the sheet, wait a few minutes then rinse clean with VERY HOT water.
Cheerio,
RE: Prints suddenly failing - Need some Help
Hi,
First i want to admit that i have printer since two months... But I had similar issue two nights ago while printing also some batch of parts, which i made dozens of recently and i tried to change bit bed aligment on some while testing other support, and appartenty it started to print some of them like the printer loose the Z layer calibration. And support cross each other... And after that print, printer behave like having wrong Z layer setting. So i cleaned the plate, recalibraed first layer, because coludn't match the setting, i was wondering if i could change the shape of TXT sheet, so for test i used completly new satin plate to calibrate... still without success... so after some hour or two of trying to calibrate the printer i power cycle the printer... and after i switched it on again it started to print correctly.
Literally without issue... i attached again previously used TXT sheet, and printer was able to print like before without any issue and without any recalibration... oO?
Because it's third time in two months i use the printer, and i thought that it's because i change filament between prints, but recently im using the same material so i excluded that possibility. And i think it's some FW/slicer related... (slicer 2.7, firmware 5.1) because i observed the issue only after few days of constant printing, or at least machine being switched on.
I will try to narrow down this issue, since i saw some opened slicer issue creating weird files, which are different while being uploaded to the printer.
So maybe try to reset/power cycle the printer... i'm not sure if this will help in your case, but it helped for my mini, and three times solution was similar, after power cycle i could still use the old Z-layer calibration value...
RE: Prints suddenly failing - Need some Help
If you take a look at all the models on a sheet, they all have adhesion problems.
I am assuming that. you didn't change profiles and haven't done any software updates. If you did, you better reslice and recalibrate.
I always recalibrate every time I change steel sheets. I use stock mesh leveling calibration and this( https://www.printables.com/model/251587-stress-free-first-layer-calibration-in-less-than-5) which is a really nice fast print to test not only Z level but the perfect gap between each line
Also, I recommend washing steel sheet with warm water and soap. Maybe few times. I use 99% Isopropyl Alcohol in a small spray bottle and clean sheets every time before printing. Sheets must be cold for this. I use this microfiber towel( https://theragcompany.com/collections/all-microfiber/products/premium-glass-window-towel) specifically only to clean sheets.
Now, I think another issues here is Acetone. While they note this on for Satin/Textured sheets but Smooth PEI sheets also can be killed by acetone. I never used acetone and it was fine. Try washing with dishwasher soap and hot water first