Documentation update for high SCV and zero-fitted max_accel

[mammoth-3D-DevTeam]

K-Shake&Tune module branch

• I confirm using the main branch

Version

v5.1.1-2-gc8ef451e

Describe the bug and expected behavior

Hello
I just reinstalled my PI as I had the same problem before.
Beacon is Installed and when I run AXES_SHAPER_CALIBRATION

I get outputs that look like this but no Max Accel Infos.
Is there a way I can fix it?

Thank you very much for your help and feedback.

Regards,
Mike

Additional information and klippy.log

No response

[Frix-x]

Hi, this is perfectly normal. Max_accel is computed based on all the machine's parameters and tries to find a max_accel that still allows for acceptable smoothing values. However, in your case, you have such a high SCV that it's impossible to achieve low smoothing, even at a very low acceleration. Therefore, the highest acceleration that can be achieved while maintaining acceptable smoothing is zero.

You shouldn't use an SCV that high, as it serves no purpose and will just make your prints brittle with defects in the corners and infill anchors. It's a bit like having too high a pressure advance. A good rule of thumb is to usually use your maximum print acceleration and divide it by 1000, with a maximum clipped value of around 12–15.

[Frix-x]

Ok I'll reopen it because you are not the first one to ask and I'll probably add it in the documentation :)