I created the attached gcode for the attached model with the default M2 FFF. I don't know if I am doing something wrong, but I would think whatever it is, the software should have caught it. Either way, can you help me create usable gcode for this model?
I have a feeling the problem is that your extrusion width is greater than the thin 0.5mm walls of the part. For example, if your extrusion width is 0.6mm, the software would look at this scenario and say that "I have a wall that is only 0.5mm thick, but I am configured to use a 0.6mm extrusion width. I can't lay down plastic here because it would go outside of the desired part dimensions". This is just the nature of using a fixed extrusion width FFF-style process, and this same logic is also why most parts the software creates have such great geometric tolerance!
My suggestion would be to either modify your layer height to obtain an extrusion width < 0.5mm, or you could also set the extrusion width manually to a value < 0.5mm, but you would need to modify the extrusion multipler accordingly (since telling the software it is laying down a much smaller extrusion width than it actually is will lead to over extrusion).
Personally, I think a lof of the calibration parts like this should be made with a solid interior and then you can just configure the slicer to use 0% infill and no top/bottom solid layers to make it hollow. That is a method that would work with all printers regardless of the extruder nozzle size or defined layer height.
Well, that seems reasonable, since the listed extrusion width that I get in that other slicing program shows 0.52 mm in the header. However, when I look in the settings for Creator, the "Auto Extrusion Width" is checked and the grayed out box reads 0.39mm. Does the value in the box have any meaning? I am guessing it doesn't based on the next things I tested.
I tried 0.28mm (this was the largest Creator would allow without being below the 1.2 width/height ratio), and I tried 0.10mm. Both of these values produced the same problem.
I tried typing in 0.50mm for the extrusion width, but I got the same result (I also tried 0.49mm just in case).
Really, all I wanted to do was have some small parts to dial a few things in, since I tried the Make magazine torture test piece and it failed miserably with the default settings. I wanted something that only takes a few minutes to print to get some things sorted before trying that again. Maybe I'll look for some other small prints.
The Make Magazine torture test can be challenging so you definitely have the right idea dialing in your settings on some simplified parts first! If you want to do a single wall print, just use an STL file like this one (http://www.thingiverse.com/thing:68445) and set your infill percentage to 0% and your top/bottom solid layers to zero. That will give you a single outline like you're looking for.