[0xyqen]

I am trying to simulate 3D scroll compressor and expander.
The remeshing process is not what I want, so it gives a negative volume error in first iteration for 3D.
2D https://youtu.be/MkMrTy_3OUY
I have a problem with UDF file. when I rotate the orbit scroll with the DEFINE_CG_MOTION command, the meshes stretch a lot and give a negative volume error.

What command will I use? DEFINE_GRID_MOTION?
Why is remeshing proses not working properly?
Is UDF enough for orbiting scroll only? or Do I have to make a udf file to change the nodes in fixed scroll?

CAD file, mesh settings and timestep are the same as in the article.
What is the mistake I made in the UDF file that the remeshing process is such nonsense.