[BUG] ADAPTIVE_STEP_SMOOTHING causes skipped steps.

[rabirland]

Did you test the latest bugfix-2.1.x code?

Yes, and the problem still exists.

Bug Description

When using ADAPTIVE_STEP_SMOOTHING the potential torque of the motors are severely limited. The motor current have to significantly increased (at the range of 900 to 1000mA in my case) to prevent skipped steps above acceleration 5000 mm/s^2.

Bug Timeline

No response

Expected behavior

The motors motors could output the same torque as without ADAPTIVE_STEP_SMOOTHING.

Actual behavior

Pulling the acceleration above 5000 with ADAPTIVE_STEP_SMOOTHING increases the potential of skipped steps in some machines.

Steps to Reproduce

1. Enable ADAPTIVE_STEP_SMOOTHING in the firmware
2. Begin to increase the acceleration, see where it starts to produce skipped layers.

Considering this is highly machine dependent, confirm the results with the same acceleration (that caused shifting) with ADAPTIVE_STEP_SMOOTHING disabled.

Version of Marlin Firmware

Marlin bugfix-2.1.x

Printer model

Custom built machine

Electronics

SKR MINI E3 V3

LCD/Controller

Ender 5 plus factory DWIN display

Other add-ons

Direct drive module with a 42-40 motor attached

Bed Leveling

ABL Bilinear mesh

Your Slicer

Prusa Slicer

Host Software

SD Card (headless)

Don't forget to include

• A ZIP file containing your Configuration.h and Configuration_adv.h.

Additional information & file uploads

Find my configuration.h and configuration_adv.h on the links.

[rabirland]

Described a theoretical fix in #27242