empty first 2 layers in 2.5.2 with custom profile
I'm getting 2 empty first layers when slicing with custom profile (Anycubic Kobra) in Prusa Slicer 2.5.2. The bottom layer, support etc appears in/from layer 3. All works well in 2.5.0 and even in 2.5.2 when slicing for my MK3S. Any idea somebody?
Best Answer by Neophyl:
I did a clean install of 2.5.2 and added the default ender 3 profile, added a cube and sliced. I then saved the same project from 2.5.2 to check in other versions.
With 2.5.0 it displays the preview fine. Its displaying layers at 0.2/0.4/0.6 etc just as the print profile is configured (0.2mm first layer height and 0.2mm for normal layer height). There are a total of 113 layers sliced
With 2.5.2 the first layer is not displaying, but if you look at the height on the slider its also showing 0.28. Move up a layer and it changes to layer 2 but shows a z height of 0.2. There are a total of 114 layers sliced. SO 2.5.2 looks to be adding in a non real phantom layer 1 with a layer height of 0.28. At least on the preview
With 2.6a5 it displays the preview fine. Its displaying layers at 0.2/0.4/0.6 etc just as the print profile is configured (0.2mm first layer height and 0.2mm for normal layer height). There are a total of 113 layers sliced
I compared the gcode produced between 2.5.0 and 2.5.2 and the output is identical (except for the slightly different header/footer expected between different versions). SO its limited to the preview and not the output code.
Might be worth reporting it on github but as its ok in the 2.6 alphas ...... Just checked and there was this https://github.com/prusa3d/PrusaSlicer/issues/9722 reported in alpha 3 which is basically the same issue. Probably not worth it.
RE: empty first 2 layers in 2.5.2 with custom profile
Do your profiles have any z offset configured in printer settings, such as in General or in the start gcode block ?
RE: empty first 2 layers in 2.5.2 with custom profile
No, z offset ist 0 (configured at the machine). In the meantime i checked the included Ender 3 profile which also leaves the first layer empty. Could someone crosscheck this? Looks like a bug for me.
RE: empty first 2 layers in 2.5.2 with custom profile
I did a clean install of 2.5.2 and added the default ender 3 profile, added a cube and sliced. I then saved the same project from 2.5.2 to check in other versions.
With 2.5.0 it displays the preview fine. Its displaying layers at 0.2/0.4/0.6 etc just as the print profile is configured (0.2mm first layer height and 0.2mm for normal layer height). There are a total of 113 layers sliced
With 2.5.2 the first layer is not displaying, but if you look at the height on the slider its also showing 0.28. Move up a layer and it changes to layer 2 but shows a z height of 0.2. There are a total of 114 layers sliced. SO 2.5.2 looks to be adding in a non real phantom layer 1 with a layer height of 0.28. At least on the preview
With 2.6a5 it displays the preview fine. Its displaying layers at 0.2/0.4/0.6 etc just as the print profile is configured (0.2mm first layer height and 0.2mm for normal layer height). There are a total of 113 layers sliced
I compared the gcode produced between 2.5.0 and 2.5.2 and the output is identical (except for the slightly different header/footer expected between different versions). SO its limited to the preview and not the output code.
Might be worth reporting it on github but as its ok in the 2.6 alphas ...... Just checked and there was this https://github.com/prusa3d/PrusaSlicer/issues/9722 reported in alpha 3 which is basically the same issue. Probably not worth it.
RE: empty first 2 layers in 2.5.2 with custom profile
Thanks for your effort! So I will stay with 2.5.0 for the Anycubic Kobra and switch to 2.6 when stable.