Elegoo Saturn 4 Ultra 16k printer settings in .goo file are gone after save

[Q8804389]

Hello!

I maybe found a bug, but I'm not sure if maybe I did something wrong, so here's the story:
I'm using UVTools (Currently Verison 5.1.0) for a very long time now. With my Anycubic M3 Premium, I never had issues with UVTools. Now I got myself a new printer, the Saturn 4 Ultra 16k, which uses that tilt mechanism instead of raising and lowering the build plate.

With the new printer I got some serious fail prints. I'm using lychee for slicing and I wasn't aware that I need to set lift settings in my resin profile. After fouding that out, I corrected it. Here are my settings:

After slicing I always use UVTools to reprocess the file (and with lychee, this is definitely recommended). And now we come to the main point: Before I do something with my sliced files in UVTools, I check the printer settings (now especially lift height and lift speed). In Calibration -> Lift Height, I see my settings just as I set them in Lychee:

After repocessing the file and saving the state, I looked again in the Lift Height settings and I found this:

So tl;dr;: It seems like UVTools is deleting/resetting/changing my printer settings after I save my files (even without touching them by myself), which explains the behavior of my printer during prints: The print plate does not lift during the layers.

So my questions are:

• What do I do wrong? Is there something I have to look at?
• Is there something going on with the .goo file format (the internet mourns about that currently)?
• Do you need more data from me? Would like to help if something in the code is wrong.

I'm a bit lost about this. Thanks for any help!

Best regards
Patrick

P.S.: One more thing: I exported the content of a file and had a look into the configuration.ini (that was where I found out what was wrong). I added a config.ini from before save and after save.
Configuration_AfterSave.txt
Configuration_BeforeSave.txt

[sn4k3]

Saturn 4 Ultra 16k is tilting vat printer, does not use lift settings. Slicer and UVtools always reset to 0 or predefined value which have no use.

[Q8804389]

Thanks! Will try CTB, as GOO is already not working.

I also had a look into your classes for Goo and CTB. Will modify the class locally and will try to make an executable out of it. Lets see what that brings..

[sn4k3]

I also had a look into your classes for Goo and CTB. Will modify the class locally and will try to make an executable out of it. Lets see what that brings..

Yes that will also work. And the only way to get this fixed, because I have no way to test such without a machine.

[Q8804389]

That makes absolutely sense ;)

Will report about the results.

[Q8804389]

Sooo I just wrote a comment about the new version 5.1.1 and that the problem has been adressed, but it seems like it does not work. I just tried it out and the lift values are still set to 0 after saving the file.

Just looked in the code. HaveTiltingVat is still used in PrintParameterPerLayerModifiers which is somehow involved in the save process (wasn't able to see where exactly).

For my test print I changed HaveTiltingVat so that my Saturn 4 Ultra 16k Is not regocnized as a tilting vat printer and that works.

I guess that Elegoo did some changes in using those parameters for the 16k variant. Looks like this reported issue is related:

#1013

[sn4k3]

The update was minor, nothing really changed, I just set other speed parameters also to 0.

The code you need to modify is here: https://github.com/sn4k3/UVtools/blob/master/UVtools.Core/FileFormats/GooFile.cs#L1085

From:

const float liftValue = 0;
const float speedValue = 0;

To:

var liftValue = LayerHeight;
const float speedValue = 60;

This is what I used before, people also reported problem.

Theres also a bug on the new code
Replace RetractHeight2 line with RetractHeight2 = liftValue;