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slic3r / Slic3r

Open Source toolpath generator for 3D printers
https://slic3r.org/
GNU Affero General Public License v3.0
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Printing interface between support and body for rabbits and horses #2142

Open michael019 opened 10 years ago

michael019 commented 10 years ago

Hi, Slic3r 1.1.3 + windows 7; When I print a rabbit or a horse model,there are some problems on printing interface between support and body.How to config parameters in slic3r to avoid it? 3 1 2

jonaskuehling commented 10 years ago

We have quite the same experiences over here. I'm not into the details of the algorithm that decides which gap between support interface and model is left for easy removal, but the more supported objects we print, the more convinced we are that something is beeing handled wrong in this regard.

@alexrj I noticed that there was a discussion somewhere here with @nophead and others about this topic and the arguments for how slic3r does this don't seem too wrong to me. But it actually doesn't work from my experience ;-) At least not when doing model perimeters on support interface. Maybe it's just the speed and it would work well if we'd have a separate speed setting for the perimeter parts that are printed directly on top of support interface, so we can slowly and carefully lay down the first model perimeter (extruded round like bridges..)? The related perimeter sections may be detected similar to bridges and adjusted in its speed like with bridging perimeters.

Or we simply use bridging speed setting, for bridges AND supported perimeters..? Although straight bridges can be printed faster than these problematic perimeters mentioned here..

michael019 commented 10 years ago

Thank you! That do help me! we test a lot of models,there are the same problems here. I want to know whether I have an unreasonable configuration? Now I can config Support interface speed 、interface layers、interface pattern spacing ,But it seems that have not taken an effect.

lordofhyphens commented 8 years ago

FWIW slic3r up until a recent PR makes the z gap the (nozzle_diameter-layer_height) + value, which made it difficult to fine-tune the interface to make it work.

bubnikv commented 7 years ago

Slic3r uses bridge flow for overhangs with less than half the extrusion width supported if enabled with the "overhang" parameter. Slic3r calculates the support layer to be below the bottom of the bridging flow, and it trims the support layer by an inflated object. Because both the offsets (in Z and in XY plane) are done independently, the gap is ensured by the Manhattan metric, not the Euclidean metric, which is too far to support the non-horizontal overhangs, so the supports are not very effective. I see no simple "one liner" cure though.