[BUG] Trying to open photon file used for rerf by Anycubic photon gives Z position error

[serenata-kenneth]

Trying to open the photon file here https://github.com/altLab/photon-resin-calibration/blob/master/resin-xp-finder/resin-test-50u.B100.2-20.photon but I keep getting the error showing in the screenshot

[sn4k3]

It's not a bug, it's a fail-safe check error to save users from problems while printing. Error message is clear... Layer 2 is positioned at 4mm Z while layer 3 is positioned at 0.1mm Z. So layer 3 have lower Z than layer 2 which should not happen. If file is malformed or have bad layer data, then UVtools warn you and prevent the file from open.

All layers with exception of layer 2 are positioned at 0.1mm, so that layer is causing trouble.

PS: That file is a hacky way to print the test with lifts disabled on firmware, that 4mm layer is empty and then will return to 0.1mm with an empty image, it act as a Lift movement for that 2 layers. This file was made to be printed directly, UVtools will not like it because is malformed in his eyes and as a normal print logic.

[serenata-kenneth]

Understood.

I wanted to load up the file in UVtools so that I can adjust the resolution since i recently modded my OG Photon by adding a new LCD screen from ChituSystems with a different resolution.

[sn4k3]

The only way is to bypass that security check. Tell me the resolution and i will change the file for you, but only if LCD screen have same dimension as the original, otherwise test is no longer valid and require a new slice.

[serenata-kenneth]

The lcd is exactly the same size since it is an upgrade 5.5 inch replacement

The new resolution is 1920 x 1080

Many thanks!

[sn4k3]

Humm thats looks like an downgrade... Original file is 1440x2560 LCD: 67.5 x 120 mm Pixel: 46.87um

With your new LCD you will have a pixel size of: 62.5um and then the slice image will be no longer valid, even if i adjust the resolution you will cure pixels 1.33x bigger than should yield in a larger bloated test, can only solve this by reslice the file with correct machine info. OR get other file that ends in a pixel um similar to 62.5um, target machine doesnt matter as soon you got the res and display right. But if you don't mind in streching the test i can do the resolution modification for you

[serenata-kenneth]

Well yes a downgrade in terms of resolution, but an upgrade in terms of exposure times and lcd lifespan because from 8 seconds exposure I went down to around 1.4 seconds :)

I wouldn't mind in stretching the test. Appreciate the help!

[sn4k3]

Ok, i was unable to change resolution and fit all content:

So i resized images by 66.66% to fit the content and match your pixel um. resin-test-62.5u.B100.2-20_FULLHD.zip

Hope that fits your needs

[serenata-kenneth]

Excellent! Thank you