Marlin 2.0 Retraction doesn't work

Hello,
I'm running my 3D printer on motherboard BIGTREETECH SKR V1.3 with latest marlin bugix 2.0. Unfortunately extruder motor goes only one way. When i enable retraction or just send combination of gocdes: G91 then G92E0 ten G1E-10, it still extrudes. I have plugged extruder motor to x axis on motherboard and it spins in both directions fine.

I would appreciate any help or maybe guide how can i test swap E0 to E1 to check if motherboard is damaged.

swapping e0 with e1 is easy

in /Marlin/src/pins/pins_BIGTREE_SKR_V1.3.h

find

#define E0_STEP_PIN        P2_13
#define E0_DIR_PIN         P0_11
#define E0_ENABLE_PIN      P2_12
#ifndef E0_CS_PIN
  #define E0_CS_PIN        P1_08
#endif

#define E1_STEP_PIN        P0_01
#define E1_DIR_PIN         P0_00
#define E1_ENABLE_PIN      P0_10
#ifndef E1_CS_PIN
  #define E1_CS_PIN        P1_01
#endif

Swap all the E0's and E1's

The firmware will now use the E1 drivers as E0 and vise versa

Edited 1 time(s). Last edit at 04/28/2019 11:41AM by Dust.

After swapping extruder doesn't work at all. Now i don't know if MB is faulty

Hi, Just wondering what drivers you are using? I'm using a SKR V1.3 with four TMC2208 and I'm getting unusual retraction. It works perfectly with a four tower retract calibration but just falls apart when printing a benchy.

I'm still working through exactly what's happening but I did notice that retraction completely stopped over 30mm/s, even when raising Vmax E to 50mm/s.

I have tried with waterrot TMC2130 and DRV8825. Results are the same. I have also 2208 by lerdge but i don't know which pads to connect to have them in uart mode.