Underextrusion, retraction, extra prime and coasting test REMIX for 0.6mm Nozzles
Description
This is based on Brilliant Name's "Underextrusion, retraction, extra prime and coasting test" (https://www.thingiverse.com/thing:3229413/). The original model is designed for a 0.4mm nozzle so I had to make this for a 0.6mm nozzle I'm using, and I also added a 0.4mm brim which connects all the parts. I used this to reduce some blobbing I'm seeing using PETG and a 0.6mm nozzle. First however, it is important to calibrate e-steps, temp, flow, and retraction as best as possible. Then I used this model to tune the coasting. I noted that for some reason in Cura, the default coasting was set for a 0.4mm nozzle (0.064mm^3) so I ran a baseline, and then tested using the recommended value for a 0.6mm nozzle which is the diameter cubed (0.6x0.6x0.6 = 0.216mm^3). I did a write up on my blog with pics of each test which was used to tune things for the PETG I was using (http://www.mystoopidstuff.com/blog/retraction-and-coasting-one-pulls-the-other-one-pushes). In a nutshell, I suggest tuning retraction first, and then consider coasting to be a variable to polish things up with. What I ended up with after testing was a slightly higher retraction, and the recommended value for coasting based on the nozzle size I am using.
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