[BUG] G28: Axes move at slow rate after homing at (0,0) with ABL

[BigBird0000]

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

Yes, and the problem still exists.

Bug Description

I was playing around with my Marlin Configuration (bugfix, latest build) for my Ender 3 Pro and had something very strange happen.

When I would issue a G28 (HOME), the hotend and bed would move at normal speeds getting to X=0 Y=0, but then going towards the center, the bed and the hotend moved very slowly (I could hear the stepper clicks) [This can be seen in the video Ender3Slow].

If I move the hotend (not using G28) it moves along the X axis at normal speed (see file Ender3Normal).

I was wondering if anyone else had something similar happen, or can point me to a direction to fix this.

The videos and configuration.h, configuration_adv.h are in this dropbox location:

thanks very much!

Bug Timeline

Started happening this morning

Expected behavior

I expected a faster speed going towards center of bed, and downward Z movement to get bed location

Actual behavior

Homed to (0,0) at normal speed. Then going to center of bed, the x and y axis movements were slow, and the Z axes did not lower towards the bed.

Steps to Reproduce

1. Issue G28

Version of Marlin Firmware

FIRMWARE_NAME:Marlin bugfix-2.1.x

Printer model

Creality Ender 3 Pro

Electronics

Stock V4.2.2 board

LCD/Controller

Creality 12864

Other add-ons

No response

Bed Leveling

UBL Bilinear mesh

Your Slicer

Cura

Host Software

SD Card (headless)

Don't forget to include

• [X] A ZIP file containing your Configuration.h and Configuration_adv.h.

Additional information & file uploads

G28Slow.zip