Poor bridging on first solid top layer
I am having problems with poor bridging on the first solid top layer. For some reason the ends of the bridge do not want to attach to the inner perimeters. This poor surface results in getting a poor final top layer unless I add a whole bunch of extra top layers.
The example shown was done with Polyterra PLA printing at 205C. Bridging flow is 0.8 and speed is 70mm/s while most of my solid infill is at 200mm/s. Cooling is set at 100% for bridging and I am using a 4028 fan.
The filament was just received and freshly opened today.
I have tried a few changes but no significant change other that adding a few more top layer to cover it up. The example shown had 4 top layers; not a whole lot but I'd rather fix the cause of the problem rather than just mask it.
Orca Slicer Project File also attached.
Suggestions?
4 Replies
Could it be too much fan? I did a test print and slowed to fan down to 25% manually during parts of the first solid layer and saw much better results.
I also played around with speeds and extrusion factor but saw little changes.
Any other suggestions on improvements?
equal-aqua•16mo ago
That looks like a problem with the infill-perimeter overlap. Look for settings in the slicer that manager overlap and increase it.
The other setting that would help a lot is “dense infill support layer” that adds an intermediate layer between the infill and solid infill layers to bridge the density gap. (This might only exist in SuperSlicer, not sure.)
Failing all that, increase the infill percentage a little to create smaller holes that need solid infill/layers.
I don’t think this issue is a result of temp or flow.
I have increased the overlap to 45% but have not gone back to a higher fan flow yet. With 45% overlap I am still getting decent prints. Too busy making things to go back to testing....
I looked for the slicer setting you mentioned in Orca Slicer but could not find it. I did find a setting that looked like it should help but when enabled I saw no support layer generated. Thanks for you help and .
I looked for the slicer setting you mentioned in Orca Slicer but could not find it. I did find a setting that looked like it should help but when enabled I saw no support layer generated. Thanks for you help and .
equal-aqua•16mo ago
Ah, sadly it looks to only be a SuperSlicer feature: https://github.com/SoftFever/OrcaSlicer/issues/1026
GitHub
[Feature Request] Supporting dense layer from superslicer · Issue ...
Is your feature request related to a problem? Please describe. Solid layer cannot be supported with low infill Describe the solution you'd like Add supporting dense layer as on Superslicer