Yamie

Good, thank you. I've added the new information to the issue on GitHub. I'm not sure if many people can reproduce it. It might also be due to another setting in my profile that is causing this issue. These profiles have been developed over many years now

I conducted further tests and reviewed all the settings. Apart from some support settings, only the 'combing mode not in skin' seems to have an effect.

You are right; I should have included this information. Just to confirm, I uninstalled all the versions I had installed and then reinstalled versions 5.4, 5.5, and 5.6. When installing a new version, I usually keep every second older version as a backup, in case something stops working. So, I had version 5.4 running as a backup. I saved a configuration backup from 5.4 and freshly installed it into all four versions. Then, I tried to slice the same model with the same settings and orientation. Versions 5.4 and 5.5 behaved similarly. The processing quickly reached the first 50%, then paused for a few seconds before continuing. I'm not sure what to make of the progress bar. In version 5.6, the process got stuck around 50% and then failed after some time. I observed the same behavior on my laptop.

Thanks, I did report the error in git already. The error only occures during the calculation of the supports and there it has different causes. Since it's a new error since 5.6 I just wanted to confirm, that I am not missing something. Thanks for your answer!

Over the past few weeks, I have observed a problem that began with Cura 5.6, where slicing supports often fail. In some cases, changing the pattern, or in others, disabling 'connected walls' or 'build towers' solves the issue, but this seems very inconsistent and not dependent on a single setting. This issue only involves slicing supports; everything else appears to work fine so far Is this a known problem?

I can confirm, V5 splits straight lines into multiple parts unlike V4 were it was just a single line. So I redid my test, in V4 and V5 with and without linear advance. But it's all the same. Not using LA didn't make a difference. And what is even more problematic, the surface errors are not the same even after running the same gcode twice. There was also no unusual extruder movement comparing those runs. I don't know what V5 is doing wrong with flow inconsistency and those errors. The only thing I know, it is not happening in V4 no matter the settings, and it is always the case with V5 code.

@GregValiant Thanks a lot for that insight. That makes a lot of sense and I will try to confirm this again with my setup. I usually have a very well tuned linear advance. My DDE is my own design using a trianglelab bmg newest version with hardened gears and a dragon hotend. The PIDs are also tuned in very well. The distance between the extruder gears and the nozel is 93mm in my case. I will pay close attention to what LA does during printing. Regarding your pictures, I think @Sandman_d is right and you mixed them up somehow, both show the same prints. And to your question, I would guess the upper print is V5 because those are the same problems I am seeing in my comparison Left V5, Right V4 If it's not the case, yould you provide your testfile and some printing informations, so I could repeat the test on my printer. Thanks!

I did some more testing, with more materials and different nozzels, all the same. While V4 prints clean skins, V5 leaves those marks 😞 I guess I will wait for a later version and try again.

Since there are only 2 walls and both are skin, there is no inside or outside. But I pretty much always print "inside to outside" or in V4 not enabled outside before inside. I only use this setting for specific prints in TPU where it might prevent curly overhangs. I never had problems with dimensional accuracy after a good calibration. Still the new engine looks a lot better with its variable flow. New (V5 left) vs Old (V4 right)

I experimented with Cura 5 for a few weeks now, and I am going back to 4.13 for now. The old dark theme looked better and when using different monitors with different resolutions, the AA is not messed up when switching. But those are minor issues. My bigger problem is a inconsistent flow and very bad skin. I tried many settings and disabled and reenabled plugins, but it seems to be caused by something else. First the flow for all my materials was to high after the update to 5.0 when not using a 0.4mm nozzle, when printing with different size nozzles the flow is no longer accurate. I printed this flow test file of mine. It's simply 2 walls to help me calibrate the flow. All a printed top to bottom one after another. So V5 then V4 then V5 again. Printed from the same spool of CPE HG100, very well dried. As you see, the V4 looks clean, linear advance is working well and the dimensions are fine. V5 causes blobs and zits on the skin, is inconsistent in flow and to tall in Z dimension, also the linear advance is not working well. Did I miss a new setting that might cause this, or is there something wrong with V5? Thanks in advance!