I just put a 0.4 mm nozzle in one of my TAZ 6 extruders to try and get a little better detail in one of my prints. (I have three separate extruders for my TAZ). I resliced my model and reprinted it. I could hear the extruder skipping every once in a while and my first thought was that it was trying too had to push filament through the nozzle. (This is my sixth 3D printer… I started with the venerable Thing-O-Matic so my “gut feeling” has a bit of credence)…
Anyway, to make a long story short, I ended up generating two GCODE files - one with CURA set for a nozzle size of 0.4 and the other with a nozzle size of 0.5 (the default). I wanted to compare the feed rates (G0/G1) with the two different nozzle selections. While visually scanning the files, I could see NO DIFFERENCE. so I ran a “FC” (file compare) on the two files and THERE WAS ABSOLUTELY NO DIFFERENCE WHATSOEVER IN THE GCODE!!! No FLOW RATE difference and no TOOL PATH differences. (There was a change in the time stamp in the comments at the top of the file and a change in the embedded profile at the end of the files - but NO FUNCTIONAL CHANGES)!!!
Why do we have a Nozzle size parameter in Cura if it does absolutely nothing? How many people know about this? Does the software developer know about this? Is this going to be FIXED anytime soon?
I’m using Simplify3D to do my prints with non-standard nozzle sizes. Its pretty obvious that Cura only works with a 0.5mm nozzle (despite what the settings capabilities might lead you to believe)!