Drivers 1.7.5 RC2 with Slic3r Prusa Edition (Updated 18 Nov)
 
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Drivers 1.7.5 RC2 with Slic3r Prusa Edition (Updated 18 Nov)  

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Edu
 Edu
(@edu-2)
Active Member
Re: Drivers 1.7.5 RC2 with Slic3r Prusa Edition (Updated 18 Nov)

Using final 1.7.5 can anyone create gcode for the large fractal pyramid (vase mode) here:
http://www.thingiverse.com/thing:1356547

+1

Napsal : 12/02/2017 4:56 pm
Vojtěch Bubník
(@vojtech-bubnik)
Member Admin
Re: Drivers 1.7.5 RC2 with Slic3r Prusa Edition (Updated 18 Nov)

> > I am going 45 minutes slicing on this and I am on a very powerful computer. This is unusable. S3D sliced this in about 2 minutes.
> http://www.thingiverse.com/thing:1356547
>
> The fractal pyramid is a one of a hell complex object. Indeed, the fractals have an infinite complexity by definition. This model and the various chain
> fabrics are a benchmark for slicer optimization, but they are not what the most people print. It is true, that Slic3r has not been optimized for such
> models and it is on my list.

Slic3r is based on the Clipper library for the manipulation with 3D polygons:
http://www.angusj.com/delphi/clipper.php

I have found out, that the library hates complex precisely overlapping polygons. On this particular pyramid, it could easily take 20 minutes to process a single slice, if the stars are aligned properly. After studying the Clipper library for couple of days, I applied a workaround, which took the slicing of this complex object down from eternity to 7 minutes on my quite powerful laptop. Stay tuned.

Napsal : 03/03/2017 6:17 pm
Vojtěch Bubník
(@vojtech-bubnik)
Member Admin
Re: Drivers 1.7.5 RC2 with Slic3r Prusa Edition (Updated 18 Nov)

> After studying the Clipper library for couple of days, I applied a workaround, which took the slicing of this complex object down from eternity to 7 minutes on my quite powerful laptop. Stay tuned.

Couple of more fine touches and the time dropped from 7 to 5 minutes, that is at 50 micron layer height.

Napsal : 03/03/2017 9:17 pm
Wirlybird
(@wirlybird)
Reputable Member
Re: Drivers 1.7.5 RC2 with Slic3r Prusa Edition (Updated 18 Nov)

Sounds great!! I'll give it a try this evening on my machine. I'm running dual 8 core Intel Xeon's with 128Gigs of memory and SSD drives to chunk on it with!
Sounds like a good test!

Napsal : 06/03/2017 1:17 pm
Vojtěch Bubník
(@vojtech-bubnik)
Member Admin
Re: Drivers 1.7.5 RC2 with Slic3r Prusa Edition (Updated 18 Nov)

> > After studying the Clipper library for couple of days, I applied a workaround, which took the slicing of this complex object down from eternity to 7 minutes on my quite powerful laptop. Stay tuned.
>
> Couple of more fine touches and the time dropped from 7 to 5 minutes, that is at 50 micron layer height.

Added some parallelization, fixed some bottlenecks. Now at 2:43 and still falling.

Napsal : 08/03/2017 10:22 am
Wirlybird
(@wirlybird)
Reputable Member
Re: Drivers 1.7.5 RC2 with Slic3r Prusa Edition (Updated 18 Nov)

Tried slicing a fractal pyramid in vase mode and it errors out with a divide by zero (I think was the error).
I also found if you don't use vase mode it slices it incorrectly compared to what you get from S3D. Basically it adds bottom layers that shouldn't be there.

Napsal : 08/03/2017 12:50 pm
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