PLA not sticking to second layer
I am trying to print a PLA part that has a lot of radii and curves on it. In Prusa slicer I have tried "0.15mm Structural", "0.20mm Balanced", as well as "0.20mm Structural". I am using the brass, Core One 0.4 nozzle. I even tried slowing the print speed down on the Core 1 to 40% (thinking the speed might be pulling the filament off of the perimeter curve on the second layer).
The first layer is fine. When the printer starts laying the second layer, instead of the radius portion sticking, it pulls the filament off and drags it behind the nozzle.
This model prints OK on my Dremel 3D45 using Simplify3D.
Any ideas on what to try next? Is there a setting that would increase the overlap from layer-to-layer?
Best Answer by miroslav.h4:
And just so you know, here is solution #1
RE: PLA not sticking to second layer
Would be easier to diagnose if you save your project to a 3MF file, zip it and attach here.
RE: PLA not sticking to second layer
Here is the .3mf along with a screen from the slicer. grabgrocery_handle
RE: PLA not sticking to second layer
The FDM printer will no longer be able to process these radii on the bottom side of the part. There are two solutions:
The first solution: Cut the object in the slicer at half the Z height. Add connectors so that the parts fit together. Place both parts with the cut surface on the substrate and print. Then glue both parts together with the connectors on the cut plane.
The second solution: Replace the rounded surfaces with a general chamfer at a good angle, which the printer handles better.
RE: PLA not sticking to second layer
And just so you know, here is solution #1
RE: PLA not sticking to second layer
Outstanding. Thank you!
RE: PLA not sticking to second layer
Unless the thickness ( Z height ) of this handle has to be exact to the tenth of millimeter, you can cut 0.3mm from the bottom (and top too, if you want perfect symmetry). That would be similar to the second solution of Mirosvav.h4, but easier to do. Nothing to redesign, just use the cutting tool. The resultant model is 0.6mm. less in total height, but I expect that the second layer won't have much trouble printing correctly ( even on a Core One.. 🤗 )
This way you get a better looking model than if you print it in two halves and then glue them.