yellowshark 153
Hi Dave, for 1:200 scale I normally use 1.61 for my wall thicknesses. IE 4 times extruder width. I use Slic3r for slicing and if I specify 1.60 it only gives me 3 times extruder width!
If I start with a 1:100 scale then I use 3.22 so that if I do need to scale down to 1:200 then I can simply do that in the printing software and know the walls will be right.
Actually I tend not to do internal walls so I guess you could try 0.8mm for those and see how you go.
Generally I find that layer thickness of 200 microns is fine although sometimes I use 100, depends on the end requirements.
If you have no holes in the walls, eg windows, then you could start at 60m/s speed but if you do hav e windows then you will almost certainly need to drop down to 30 m/s or 20 m/s. Of course this will be influenced by the surface quality you need.
Temp. wise if I am running 200 microns at 30 m/s I will use 210 down to 200 depending on the PLA colour. At 60 m/s I would be using 220 temp.
At 1:200 scale I tend to turn off retraction.
If you do not care about what colour you use, Colourfabb's Dutch orange gives amazing right angled corners.
HTH
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shurik 87
Hi David,
This is exactly what I'm doing these days, too.
Maybe, the thread here might help:
http://umforum.ultimaker.com/index.php?/topic/4319-prints-quality-improvements/
To make the long story short:
Speed: 50mm/s
Brim: Yes
Head: 240C
Layer: 0.1mm
Outer walls: 0.8mm
Flow: 80% - very important! Put it more, and you get underextrusion, dunno why.
Bed: 60C - do not get over this.
Filament: UM Blue.
The result: perfect, I'm happy!
Another precaution: you must carefully slice the model in Cura using Layers view and play with the advanced settings of "Fix horrible" in order to get the desired result.
Good luck!
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