Prusa Slicer needs to find more dynamic pathing to take
 

Prusa Slicer needs to find more dynamic pathing to take  

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Avem Amare
(@avem-amare)
New Member

Im printing things in .25mm draft on my prusa mini and Im noticing how certain tool paths taken are not optimized for altering paths that could be faster.

As the first layer is layed, it starts from the bottom left to build the brims and perimeters. It than moves to the top left to start filling in. I feel like the program should choose to optimize the paths such as these ones. Instead of starting to fill from top left to bottom right, It should start filling in the bottom at the bottom left.

Moving onto the second layer, you can see the tool paths are simply mirrored with the same large movements taking place.

Let me know what you think.

Posted : 18/11/2020 7:04 pm
Neophyl
(@neophyl)
Famed Member

Except you aren't taking into account heat.  If it starts printing the next layer at the same place that it finished then that area doesnt have time to cool so that can cause issues.  With a nice big flat area like your picture that may not be a problem but for smaller areas it can be.  As the slicer doesnt really do any multi layer analysis to look ahead to following layers it doesnt know that.

Posted : 18/11/2020 7:47 pm
Avem Amare
(@avem-amare)
New Member

@neophyl

What would it take for the slicer to be able to do multi layer analysis? Do other slicers do this?

Posted : 18/11/2020 8:55 pm
Neophyl
(@neophyl)
Famed Member

I'm not familiar with the code base personally but I do hand around the github site a lot looking at issues and following the various discussions there.  Stuff has cropped up occasionally and from what I've gleaned it would be a major change/rewrite to the under lying processes.  I don't think any of the major slicer do so at the moment either but then again I'm not an expert on what alternate slicers are available.

Posted : 18/11/2020 9:27 pm
bobstro
(@bobstro)
Illustrious Member

A lot of factors like z-seam placement and not crossing perimeters also have to be considered. The shortest path is not always what's "best".

My notes and disclaimers on 3D printing and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan...
Posted : 18/11/2020 10:04 pm
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(@-2)
Illustrious Member

And piling on - the time taken for a few long 180 mm/s moves is small compared to those hundreds of jerk-to-15 mm/s extrusions underneath it.

It is always wise to get more than one opinion... as for trusting Prusa? No way man....
Posted : 19/11/2020 2:03 am
jsw
 jsw
(@jsw)
Noble Member

My observation is that PrusaSlicer appears more logical and efficient than Cura in minimizing travel moves, particularly on lower/higher layers.

Posted : 20/11/2020 1:56 pm
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