Help with PLA print
Hello, I am using an i3 MK3S+ and have not had any issues. My last print, I had the following issue. Although it was not the bottom layer against the build plate, it was still a "bottom" layer as you can see from the attached picture. I don't know if there is a correct term to describe the filament not adhering to the adjacent layer and coming away in strings. I was using Prusament PLA.
The remainder of the print came out fine, it was just that one layer.
I would appreciate any insight or advice.
Regards,
Nick
RE: Help with PLA print
Might be that you try to print in thin air? Can you post the zipped project file from slicer?
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RE: Help with PLA print
Possibly stupid question, somewhat difficult to tell from photos, but is the surface you are showing the one that was facing downward toward the build plate at the time of printing?
If so, there's a lot of bridging to consider.
RE: Help with PLA print
You are correct, it is printing in "thin air". I just looked at it on Prusa slicer.
I selected bridging everywhere. How do I get that area to be supported? It is a convex surface, so I thought it made more sense to print it with the flat side down, Base_support_V2_0.2mm_PLA_MK3S_4h58m.gcode
This is the sliced gcode file.
RE: Help with PLA print
Post the zipped project file.
If at first you don't succeed, skydiving is not for you.
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RE: Help with PLA print
The Prusa is very good at bridging, in general, but it looks like your model has areas that simply will not bridge.
I am also assuming that this model is intended to have it's visible 'good side' on the top, as printed, thus it will be a good candidate for the 'greasy side down' approach, where the underside will not be subject to visible inspection.
I would use break-away supports, auto generated, build plate only, with a liberal contact Z distance.
RE:
Here is the bottom view when build-plate supports are enabled. Note that the 'sane' bridged areas are bridged in this one as well.
The supports can then be broken off after printing, and it will leave a blemished 'greasy side', but not nearly as ugly as with the failed bridging.
RE: Help with PLA print
BY default Prusaslicer will try to bridge those areas. You can force it to use supports instead by unticking Print Settings→Support material→Options for support material and raft→Don't support bridges. However, don't expect anything close to the usual first layer quality as the line is still being laid down in thin air (how much, you can control with Top contact Z distance, I suggest 0.25mm), or the supports would be fused to the model.
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RE: Help with PLA print
Thank you very much all for you help. I will try your advice.
Regards,
Nick