RE: "Perfect first layer" issues
I've got 0.6mm nozzles and had no 1st layer issues. Printing with PETG, PLA, TPU. After the assembly it just printed right. Actually you might have issue with one of tools which is being used to calibrate. Are you using the same tool for calibration and printing?
RE: "Perfect first layer" issues
Exactly my point....
These perfect layer issues requires something more - at least permanent Z offset I can set.
All my PLA print are unsticking and un-warping from the textured sheet on MK4. While the all the same sheets work like charm on my MK3s - no unstick, no warp - prefect flat surface.. With the same material
I've been following these first layer issues since getting my XL (dual head) late last year, but had no time to deep dive to try to fix. Anyhow, following this thread, taking 0.1 off the Z height of the world coordinates in the slicer seems to solve my issue. I was struggling with both PETG and PLA on the Satin sheet, but only on the front 60mm of the print bed. Printing near the back seemed OK, but I did have a fair few print failures where the pint came off.
Now, I've done a series of prints today, and they all came out nice.
I guess there's still not a way to set the -0.1 Z in the slicer automatically?
I see you do get a "Sinking" appear in the slicer to at least indicate that the 0.1 has pushed the model to just below the bed.
RE: "Perfect first layer" issues
May I know how exactly you did this:
"taking 0.1 off the Z height of the world coordinates in the slicer seems to solve my issue"
I want to test it if possible
RE: "Perfect first layer" issues
In this example of an 8mm height model, when loaded the world coordinates Z height is set to half way (4mm). So just drop that to 3.9 and you'll see a "Sinking" icon appear under the model name on the RHS.
RE: "Perfect first layer" issues
To do this - change the "z offset" in the printer settings tab. To save it you'll have to give it a new name. Moving the part downward, or "sinking" it will do nothing.
I've played with this much and -0.1 works sometimes. Sometimes it's too close when the probing works correctly.
Overall the z-height is usually worse on the textured plate than the satin one, which gets it right more often.
RE: "Perfect first layer" issues
That's really interesting, and makes sense. Let me see, as I was changing a few things today trying to get an improvement.
Thanks for sharing.
To do this - change the "z offset" in the printer settings tab. To save it you'll have to give it a new name. Moving the part downward, or "sinking" it will do nothing.
I've played with this much and -0.1 works sometimes. Sometimes it's too close when the probing works correctly.
Overall the z-height is usually worse on the textured plate than the satin one, which gets it right more often.
RE: "Perfect first layer" issues
see my suggestions in my post here: https://forum.prusa3d.com/forum/postid/695622/. Maybe also helps in your case
RE: "Perfect first layer" issues
I ran into this issue with my XL back in October. Because I had a lot of printing to do that was time-sensitive, I just avoided that part of the bed till I had the time to mess around with it. Since then, the firmware has gone from 4.7.2 to 5.1.2 (and the bootloader has had 2 updates). I ran a test print last night using the updated firmware and updated slicer and now that section of the bed looks just fine. I am guessing the fixes they put in place to prevent oozing while probing corrected the issue. I am going to focus a few more prints on the zone that was printing off before, just to make sure.
RE: "Perfect first layer" issues
Been printing with my single tool XL just fine for a few months now and just started having issues with the first layer. I've read through this thread and there seems to be a lot of things people have tried. Is there a definitive solution for this kind of thing?