What is the function of MachineBackground in the photonworkshop format?

[ejongejans]

Hi Tiago,

I'm investigating the MachineBackground property in the photonworkshop format. We had a user that is reporting thin film forming on the entire build platform. I noticed in the code base that this property was first 'unknown' and then received a name 'machinebackground'.

I always assumed (after testing) that it had a value of 6506241 as it looked stable.

I created files with anycubic workshop V322. The result was this:

AnycubicPhotonD2.dl2p version: 517 machinebackgroundparameter:6506241
AnycubicPhotonM3Plus.pwmb version: 517 machinebackgroundparameter:6506241
AnycubicPhotonM3Premium.pm3r version: 517 machinebackgroundparameter:6506241
AnycubicPhotonMono.pwmo version: 515 machinebackgroundparameter:6506241
AnycubicPhotonMono2.pm3n version: 517 machinebackgroundparameter:6506241
AnycubicPhotonMonoM5.pm5 version: 517 machinebackgroundparameter:6506241
AnycubicPhotonMonoM5s.pm5s version: 518 machinebackgroundparameter:6506241
AnycubicPhotonMonoM5sPro.m5sp version: 518 machinebackgroundparameter:6506241
AnycubicPhotonMonoSE.pwms version: 515 machinebackgroundparameter:6506241
AnycubicPhotonMonoSQ.pmsq version: 515 machinebackgroundparameter:6506241
AnycubicPhotonMonoX6K.pwmb version: 517 machinebackgroundparameter:6506241
AnycubicPhotonMonoX6Ks.px6s version: 517 machinebackgroundparameter:6506241
AnycubicPhotonUltra.dlp version: 515 machinebackgroundparameter:6506241
AnycubicPhotonZero.pw0 version: 1 machinebackgroundparameter:6506241
AnycubicPhotonM3.pm3 version: 516 machinebackgroundparameter:174278401
AnycubicPhotonM3Max.pm3m version: 516 machinebackgroundparameter:174278401
AnycubicPhotonMono4k.pwma version: 516 machinebackgroundparameter:191055617
AnycubicPhotonMonoX.pwmx version: 516 machinebackgroundparameter:962807553
AnycubicPhotonMonoX2.pmx2 version: 517 machinebackgroundparameter:996361985

It got more strange when I loaded just 1 file, and set the machine to MonoX.
Saving a sliced file repeatedly yields the following values for the machinebackground value:

191055617
6506241
6506241
543377153
6506241
191055617

Any idea why you marked that machinebackground?

kind regards
Elco

[sn4k3]

We are never sure for what that fields are or thier real meaning.
From anycubic description and docs state that is the "machine background color", field is a char[4]. Whatever that means I don't know. But that property looks like info only.

For thin film, check if user have PerLayerSettings active, that flag causes problems with some anycubics: #859

[ejongejans]

Ok thx. If you don't mind me asking, where do you get the anycubic description for these parameters? I could perhaps help testing every once in a while..

[sn4k3]

I were given a document(table) with most of the fields specs, still it does not enlighten in most cases. Many of them you still have to guess.

For example look at "property" the description ("property field of the machine") does not help at all in understanding it purpose.

All I know is also described here: https://github.com/sn4k3/UVtools/blob/master/Scripts/010%20Editor/PhotonWorkshop.bt