Remove U16 from this line (potentially confusing firmware):
M350 X16 Y16 Z16 U16 I1 ; Configure microstepping
Remove this line (unnecessary, potentially confusing firmware):
M669 K0 X1:0:0:0 Y0:1:0:1 Z0:0:1:0
Woohoo! That seems to have been it - I'm now able to move all 3 axis again and again and again... Thanks a lot for the suggestions everyone!
Can anybody explain to me what the proper setting for M350 should be or how I figure it out?
And what is the purpose of M669? Why shouldn't kinematics be set to cartesian on my Workbee?
And last but not least; Does anyone happen to have a link to a full 3.4 config for a setup matching mine?
Sincerely,
Daniel