That has fixed the extruder problem, thanks for the help!

Not sure why it has suddenly taken issue with the previously fine G91 command to set relative extruder position but using M83 has fixed the problem.

Still need to do a bit of tweaking on end of print retraction to fix the little bit of oozing I'm still getting but all that should be easily achieveable.

Thanks again, Greg

Hello,

I've got an Ender 3 Pro running a Duet 2 Wifi with a Hemera direct drive extruder and hot end.

A couple of days ago I played with a few things on BL touch calibration, using the BL touch for z homing for example. Nothing that I think would affect the extruder behaviour.

Since then I'm getting a problem where at the end of my print the extruder runs backwards at full speed for a good 10 seconds. I'm asking for a relative E-2 retraction in my end G Code (copied from Cura below). I've searched the forums and google but can't seem to come up with any explanation. It does the 10 second retraction at the same time as the Z move which causes a string to form from the remaining filament in the nozzle. Can be cut off the print easily enough but it's annoying and I don't think the extruder behaviour is normal or can be good for it.

Does anyone have any thoughts on what else might be affecting this behaviour or where I've gone wrong?

Thanks,

Greg

End G Code
G91 ;Relative positioning
G1 E-2 Z10 ;Retract and raise Z
G90 ;Absolute positionning

G1 X0 Y200 ;Present print
M106 S0 ;Turn-off fan
M104 S0 ;Turn-off hotend
M140 S0 ;Turn-off bed

M84 X Y E ;Disable all steppers but Z