Same as Andy.
I’m running MPCNC with Marlin, controlling it via OctoPrint installed on Orange Pi Lite. Very reliable. Even uploading of gcode is simpler via OctoPrint, than to mess with SD card. It also reports to me estimated time.
When printing, I leave machine alone, but while milling, I’m always there.
You should set Extrusion Factor in Slicer, because every material needs slight change there.
Also, your extruder can work ok on free filament run, but stuttering while printing. If you do not hear any stutter noise while printing, then I suggest you, after next print (while nozzle is hot) take out the filament from the extruder and analyze the…[Read more]
What drivers are you using? If A4988 then yes, you need to change steps per unit. This drivers only 1/16 microstepping max.
Try to play with extrusion factor to get right dimension.
Also check, does your extruder is not skipping steps or pressure of he filament roller is OK.
I’m still in the process of finishing mine MPCNC, but as for the strength of the middle part, I would say that the weakest point is in the XYZ part, not XY (look to the picture). Maybe it is good to somehow redesign them?
Do you think, this will do the job for 600W spindel?