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CityScape Retraction Tests for Tuning Your Firmware Settings

by MacGyver, published

CityScape Retraction Tests for Tuning Your Firmware Settings by MacGyver Nov 3, 2012
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I needed something very small to test my retraction/deprime settings so I created these things.


Someone suggested I make these square so you can build a tiny metropolis after you are done calibrating your printer. I'm going to design a few more "cityscape" blocks to make this happen.

Print and measure then change your settings and print again again and again and again until you get it right.

The "circular printer test" is a 20mm disk with a 10mm disk on top then a 5mm disk and another stand alone 5mm disk.

The other one is just a tiny arch I created to test filling in top circular holes and retraction.

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Do you have the dimensions of those cityscape blocks?

I'm pretty sure they are 20mm x 20mm.

So what deprime settings did you end up going with? I suspect that my deprime setting is causing my filament to strip so I turned it to 0, but I haven't figured out what that effects. Maybe I'll check this.

Today's update, I've finally got printing at .27, .20, and .10mm layer heights using the same acceleration settings tuned!

I'm using a TOM with MK7 extruder so I had to use the TOM SF settings and the Replicator Acceleration settings.  Now I'm starting to see some very impressive results.K=0.005
Print Settings:
Filament Diameter =1.82mm Feedrate of 100 (mm/s)Travel Feedrate 150Print Temp 230 (though I usually use 240c)

Ok check this out:
The city on the left was printed with K=0.00850 K2=0 and D=9
The city on the right was printed with K=0.007 K2=0 and D=9

I have retraction at 0 and am trying to tune the K/K2 settings.  I had been using K=0.0085 K2=0 and Deprime 9.

However after the last the "cityscape" I created caused me to realize I need more tweaking because some of the shapes didn't come out right.  As soon as I get it working I'll update you on it.

Niw, if only turned into cityscape blocks so after you've printed a bazillion testing a kid could play making a metropolis. ;-)

Or a train modeler could have a sci-fi future town.

That is a great Idea!  Little city test blocks.  I'll see what I can do.