So, total noob here;
I've got the MK2 installed on my ender3 here. I've set up Cura with a custom printer with 4 extruders using the generated G-code, but when i try to print it seems to try to run the extruder too fast. (extruder skipping, blobbing etc.)
I've tried checking the toolchange G-code with pronterface and it seems to load and unload filament okay-ish (Sometimes my extruder is not grabbing the filament, hoping this will be solved with tuning the tip shape. Also the MK2 sometimes doesn't grab the T0 filament properly. I think i have to adjust the cam a little bit)
Any tips on where to look in Cura to stop the over extrusion part?
Just to be clear, our recommendation is to always start with a known good working profile. As the 3D Chameleon doesn't care what firmware you have, we never recommend changing anything to do with it, but just adding the extruders and the proper tool change gcode. The only thing that the 3D Chameleon depends on firmware wise is the max speeds, which you might have to adjust if you have a geared stepper drive for your extruder. Our default is F10000, which should exceed the maximum the printer can attain, but, some firmwares are not programmed correctly with the max... for example, a Creality machine has a maximum setting for their extruder, but if you've upgraded to a dual gear or geared stepper motor and not set the new maximum to a lower value to compensate for it, the 3D Chameleon's gcode will still try to command the F10000 feed rate, which will be too fast for the new extruder. No where in our code, however, are we dependent on a specific firmware. (Unless I'm missing something... if that's the case, let me know and I'll fix it! ;-) )
Bill
I think the issue is default Cura Gcode assumes your telling it to use "Reprap" style gcode, not "marlin" style gcode, might be the issue.
Im having this exact same issue, and I had my "Print speed" set to 60/mms, but it was trying to behave like it was set to WAY higher then that,
Is it doing this during the print itself? If that's the case, that's just your normal print speed setting that needs to be adjusted. Also, do you have a stock extruder or are you running a different one? Is it just loading to far during the initial color load that is blobbing? If so, in the gcode, you can lower the distance between the extruder drive gears and the nozzle to tune that initial load. (Note, that should only be done after viewing the second or third color change, as the first one is dependent on your initial loading of the filament into the tubes... whereas the subsequent ones are placed there in the correct loading position by the 3D Chameleon itself.)
Bill