Slicer is adding unwanted lines of TPU under PLA part.
Hi everyone, First time posting in this forum, long time Prusa user. I usually never have trouble with the slicers or printers but I am a bit confused by the behavior I am experiencing. I am making an AMD SP5 CPU socket cover that uses TPU cylinders to grip onto threaded posts on a motherboard. The main body (Grey) is PLA and the orange is TPU. For some reason the slicer is adding a layer of TPU under the handles (The flat vertical parts). When I print like this the handles break away witht he slightest pressure. The cylinders themselves stay nice and firm and I dont have an issue there.
I have tried everything I can think of to isolate just the cylinders using the multimatierial settings. I have tried changing many settings and reverted back to using the stock .2 SPEED preset and adjusting only the extruders accordingly.
Using the layer preview (screenshot below) You can clearly see the lines. The lines are classified as exterior perimeters.
Bottom picture is the full print. You can see the layers of TPU under the handles.
I apologize if this has already been discussed. I searched a few pages of topics before posting.
Thank you.
Please save your project as a .3mf file
Files > Save Project as
Zip the .3mf and post it here. It will contain both your part and your settings for us to diagnose.
Cheerio,
RE: Slicer is adding unwanted lines of TPU under PLA part.
Sorry, here it is.
RE:
I rarely use painting except for supports - it's intended as a crude stopgap if you have a part file but no access to the original CAD so I don't know how you managed to cause extra perimeters there; once created they are configurable by the perimeter extruder setting but that has side effects elsewhere on the part. Leaving the default extruder setting for the part instead of setting it doesn't help either.
So: I deleted your painting and instead added a couple of modifiers setting the extruders accordingly - new version attached, it should be close to your requirements.
Better than this would have been designing the print as one made of several parts, loading them together and assigning different extruders to each.
Cheerio,