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Using dynamic layer height to print objects of height that is not a multiple


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Posted · Using dynamic layer height to print objects of height that is not a multiple

I have made a test cube of 10x10x10.1mm (last one being the height). When slicing I want to match the actual object size perfectly, or at least where possible (though in my cube example it must be possible)

 

Obviously it can be done with a .1 layer height, but I want to cover a more abstract problem where the you can't just change the general layer height, not even considering the increased time of printing. Let's say 10.01mm, would you print at .01mm?..

 

If my layer height is .3, both my examples can be fixed as this: first example: print the last layer at .2; second example: print the last layer at .21. In my case I chose to go with a target of .3 layer height, aka "always prioritize using .3mm and use other sizes only where needed"

 

I took a look at using adaptive layers but it seems to solve just a similar problem to mine, and is NOT filling the whole cube. I'm left with the gray outline at the top of the cube which means there are parts of object not covered by layers (presumably a new layer cannot fit there)

 

Ok so now some reproducible example. I have a similar cube, but of .3mm height. Layer height is .2mm, so this means that the slicer should be able to put a .1mm layer height (since the first layer has a separate fixed layer height, which is .2mm in this case). As you can expect since I made this post.. it doesn't work..

 

image.thumb.png.d2ec3a47d6e2a2ec87340f1e78304564.png

 

Maximum variation: my nozzle should be able to handle .1 to .3mm, and since I'm at .2, then the setting of .1 should cover all the available range (including our prediction)

 

Variation step size: i don't really want any smooth transition, so ideally we would use something like 9999. i have played with both 9999 and .1 (which is in the photo): same result. it would've make more sense if this setting was referring to the steps in our .1-.3 range. as example, if the setting was set to .01, then we would have <(max-min)/step+1> steps, which is (.3-.1)/.01+1 = 21 possible layer heights to choose from (including our expected .2 and .1). again: looks like adaptive layers is not trying to solve my specific problem, so variation step size has a different meaning

 

Topography size: i played with this one too, including 0. in my problem, no such thing exists, layer height should change regardless of horizontal distance

 

Doing some dirty tricks here and there will get the cube to work, but they are obviously not made to work that way, and would fail if used for more advanced objects where we have multiple tips/tops of different heights to satisfy

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