370mm X 250mm X 300mm

[AutoWiz]

I am totally with you on the speed thing. I really just wanted to do this last rework to each printer to clean up the wiring as much as humanly possible, brace the axes as much as possible, and make them all look like they belong together. I very much want to see how fast they can print. My Geeetech i3 printer now called 'Old Blue' is waiting for a new mainboard as I burned the one in it connecting the 5015s fan polarity backwards for a while. And Printalicious is pretty much done but waiting for a set of tmc2209 uart drivers and a clone MK3S magnetic spring steel heated bed assembly. All parts are coming from https://www.biqu.equipment/ and I ordered them back at the start of march. It sucks I am waiting so long but one day they will arrive. As for Big Red here I have gotten so far but am having problems. I made a video and uploaded it to youtube that illustrates my current problem: https://www.youtube.com/watch?v=iICQ8sENQJs&t= . I am currently chasing this problem and welcome any ideas for a solution.

[spegelius]

Can you post the gcode somewhere? Maybe there's some kind of configuration issue with the purge lengths or something. During the initial purge moves it shouldn't move the extruder backwards AFAIK. I haven tried Prusa Slicers multi-material support for a while so I can say it's not meant to do that, though... I'll see if I can get Prusa Slicer configured for my 6-color machine, at least try so I can see how it does things.