Having Trouble with Large Circular Prints
I'm attempting to print a crown model and I've encountered an issue with 2 completely different STL files. It looks like some of the lines failed to adhere. I wonder if it has something to do with the footprint of this print as it's larger than what I've printed recently.
I'm using a relatively new/clean steel sheet and have calibrated my first layer three times. Printing at 0.15 QUALITY setting in PruseSlicer with 15% infill and generic PLA filament type. This filament has worked great for other 8+ hour prints.
Printer is MK3S and is on firmware 3.9.3-3556 - which was working fine for most other prints.
What troubleshooting steps should I attempt in order to resolve this issue?
RE: Having Trouble with Large Circular Prints
You should try a completely clean sheet (lots of water and dish washing agent and/or lots of 99% IPA and paper towels) and rerun first layer calibration and post a picture of the resulting rectangle. You need to run the first layer calibration until the rectangle turns out perfect, depending on your experience and handling of the knob during calibration this may be more than three times or just one time...
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RE: Having Trouble with Large Circular Prints
And speed, let the first layer go slow, even around 15mm/s make sense. Its heavy time killer but slowing down first layer to something like this never failed me with complicated shapes. Clean and calibrated sheet is a must anyway 🙂
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RE: Having Trouble with Large Circular Prints
I appreciate the responses. I agree first layer calibration, clean print sheet, and slow first layer are all excellent initial trouble shooting steps. 👍 The first layer calibration is excellent and the sheet is new and very clean. I've ended up reducing first layer speed to 15mm/s as suggested.
After further troubleshooting, I think the problem lies with the models. I've ended up resorting to supports. I don't think the models are slicing properly or are not laying quite flat to the bed in PrusaSlicer. I'm almost an hour into the print and the supports seem to be working great. Not the best solution, but I guess some models just need supports.
RE: Having Trouble with Large Circular Prints
If you want, you can post your ZIPPED .3mf file (it has to be ZIPPED or it won't get posted) and folks here can help troubleshoot the model.
Mk3S+,SL1S
RE: Having Trouble with Large Circular Prints
How about doing a first layer calibration and take photos of it and show us? 2 pics, one of the full bed, another of a closeup of the little rectangle. This way we can decide if we all agree what an excellent first layer looks like.
Cheers
-Bob
Prusa I3 Mk2 kit upgraded to Mk2.5s, Ender3 with many mods, Prusa Mini kit with Bondtech heat break, Prusa I3 Mk3s+ kit
RE: Having Trouble with Large Circular Prints
How about doing a first layer calibration and take photos of it and show us? 2 pics, one of the full bed, another of a closeup of the little rectangle. This way we can decide if we all agree what an excellent first layer looks like.
Cheers
-Bob
RE: Having Trouble with Large Circular Prints
It looks like you're a touch low, but that should be sufficient. We can't blame this on first layer.
Where did you get the model? I've seen models that due to quirks in the model itself it won't sit firmly on the bed so despite everything else being correct, good first layer, nice clean bed, you don't actually get contact. Have you checked to insure the model is fully in contact with the bed? When I get those, I use the Move tool to lower the model a layer or two into the bed then use the Cut tool to bisect the model and only keep the top part.
Cheers
-Bob
Prusa I3 Mk2 kit upgraded to Mk2.5s, Ender3 with many mods, Prusa Mini kit with Bondtech heat break, Prusa I3 Mk3s+ kit
RE:
Following what Bob said, in the slicer preview you can drag the orange bar on the right all the way down to observe the first layer(s) and confirm there's nothing funny going on
RE: Having Trouble with Large Circular Prints
@wintermute
you never posted the Project file, so I'll just ask. is the model chamfered/rounded on the bottom edge?
Regards
Swiss_Cheese
The Filament Whisperer