Holes in top layer show lower levels' different color  

RE: Holes in top layer show lower levels' different color

Additional information: it prints substantially the same on my Prusa MK3S using PrusaSlicer defaults, 0.15mm, 100% infill.

- Jim

RE: Holes in top layer show lower levels' different color

The problem is that the slicer tries to fill the area between the perimeters but the combination of extrusion width and varying distances between the perimeters across the letters doesn't give it enough space to work with.

A few things you try, in order of increased likelihood of success:

* Different font size

* Modified extrusion width, e.g., 0.3mm for perimeters and infill. Of course you should use a height range modifier to adjust it only in the region of the text.

* Smaller nozzle, e.g., 0.25 mm nozzle, which gives you greater horizontal resolution 

PETG in general will give you inferior results, compared to PLA.

You appear to be printing just one layer of text on top of a flat surface.  For a more even appearence print a few layers deep so the underlying filament is the same colour.

Attached is a demonstration of the technique with from 0 to 4 underlying layers: unzip, load both files together as parts and allocate to different extruders.

The file is intended for 0.2mm layers.

Cheerio,

RE: Holes in top layer show lower levels' different color

Thanks Foxrun.  I tried .3mm and it filled in the holes better, but the quality of the lettering was noticeably lower.  Smaller font did work better too, but it's too small for what I need.  

Diem, it's more than a single layer - it's actually 1.0mm tall.  

I tried a Prusa tan filament, and it was better than the Atomic FDE, but not good enough.

What works much better is printing the text in black (PETG V0 ) on top  of the Atomic FDE.  The black PETG V0 fills in the holes nicely.

Jim

In that case you need to use a different fount or size.

You have variable width strokes when there is only room for either two, or three, extrusions; as the strokeweight changes the number of extrusions has to shift from one to the other.

For smaller text you have to work backwards from your extrusion width - probably still on the default 0.45mm.  Effectively you must print at roughly 27lpi or 55.5dpi in 2D printer terms - eg., your text sample should be compared with 1pt inkjet text seen under a magnifier.  So anything under 72pt text should be back calculated from the number of lines (extrusions) available and many of the smaller sizes just won't work.

The example I posted above does take some of these factors into account and is about the smallest text you can print without taking special measures.

Cheerio,