BUG Extruder cant reverse when correct stepp/mm is set

[gamst666]

Did you test the latest bugfix-2.0.x code?

Yes, and the problem still exists.

Bug Description

When defining DEFAULT_AXIS_STEPS_PER_UNIT to correct values Extruder wont retract / reverse. (It does make a litttle noise though) With default E value, forward is slower than reverse.

DEFINE DEFAULT_AXIS_STEPS_PER_UNIT { 160, 160 , 804.44 , 380, 380 }

But when value for correct feedrate is inserted, Extruder will not reverse.

DEFINE DEFAULT_AXIS_STEPS_PER_UNIT { 160, 160 , 804.44 , 1862, 380 }

System Geeetech I3 Pro C with GT2560 board (Only 1 extruder and is changed H2 Biqu) 24 Voltage PSU installed. Tried with different driver options , and original Extruder.

Bug Timeline

When installing Marlin 2.xx

Expected behavior

working retraction with same speed as extruding. Testing in Repetier host manual control.

Actual behavior

Retraction only making a little noise.

Steps to Reproduce

No response

Version of Marlin Firmware

bugfix-2.0.x

Printer model

Geeetech I3 Pro C

Electronics

Standard GT2560 , 24 V PSU

Add-ons

No response

Bed Leveling

No response

Your Slicer

Prusa Slicer

Host Software

Repetier Host

Additional information & file uploads

2_conf_Files.zip

[gamst666]

Found the following: decreasing DEFAULT_RETRACT_ACCELERATION to 50 (from 3000) makes retraction work.. With some noise and very softly start. I think the current for extraction is too low ?, and will try to find any settings defining this.

Any suggestions ,- please do not hesitate to comment.

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