"Print Speed Limit to Height" setting

I’ve been searching for a way to change the speeds in Creality Print so I can slow down the head at specific print layers (Z). I need this feature specifically for printing Lithophanes because at higher levels the build starts to shake and creates artifacts which look not so good.

I found the setting “Print Speed Limit to Height” but I’m not exactly sure what the adjustable settings mean (see image). I’m assuming this is the area where I can specify layer height/speed/acceleration but I’m not clear on how to interpret it?

Does anybody have experience with this setting and if so could you share some insight.

My Lithophanes print fantastically smooth up until midway and then it gets dicey and I’m tired of wasting material.

Thanks

I have similar issue how to understand those values. I dont find any usefully documentation for those topic (parameter-tabs | Creality Wiki).

Here is the default value for “Print Speed Limit to Height”
[[100,150,100,6000,210],
[150,200,80,5500,200],
[200,230,60,5000,195],
[230,250,50,4000,190]]

How I understand from left to right inside each bracket:

  1. min Z altitude in mm (aka layer count multiplied by layer height),
  2. max Z altitude in mm (same as above like 1-2 is a range),
  3. Maybe this the speed limit in mm/s,
  4. Acceleration limit “mm/sec on 2nd square” (in V3 KE max 8000),
  5. Head Temperature limit in Celsius

But I also confused by “Acceleration Limit by Volume” similar as this one:
stated as “kg,mm/s2”
[[0.3,0.6,150,6000,200],
[0.61,0.9,100,5500,195],
[0.91,1.2,80,5000,190],
[1.21,1.5,60,4500,180],
[1.51,2.0,40,4000,170]]

Possible fields:

  1. min model weight in kg,
  2. max model weigth in kg,
  3. Maybe this the speed limit in mm/s,
  4. Acceleration limit “mm/sec on 2nd square” (in V3 KE max 8000),
  5. Head Temperature limit in Celsius

But those are also cause confusion we have multiple:

  • Temperature (Tools/Manage Material values, Parameter-Config/Material tab values, “Print Speed Limit to Height”, "Acceleration Limit by Volume),
  • Speed (Parameter-Config Speed vs. Material values)
    Which is the priority order???

I pretty much thought what you said for the values but I don’t have the time to experiment and looked pretty much everywhere to no avail.

Cura has this option under “Extensions” > Post Processing> Modify G Code and as you can see it’s much more user friendly. The only issue I have with these other slicers is that there is no one click printing option. Slicing it, exporting it, importing it is so 2010s. :face_with_diagonal_mouth:

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