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How to change retraction recover speed in UM2.1 Marlin?


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Posted · How to change retraction recover speed in UM2.1 Marlin?

With the UM2.1 firmware, the retraction speed setting in LCD menu only controls retract_feedrate. However, retract_recover_feedrate is constantly 25mm/s.

Because the retraction noise is very annoying and I sometime need to dial down the retraction speed to reduce the noise. It would be nice if the recover speed can be changed together with the setting.

Currently I slice gcode in CURA with reprap flavor to get same 17mm/s for retraction and recover, which result in a very quiet retraction action. But I prefer to slice in UltiGcode flavor if possible.

I wonder how to modify the firmware so the retraction recover speed can be changed together with retraction speed in the menu. I tried tweaking it but couldn't get it to work right.

Thanks

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