Had a quantity of PAHT and it’s support filament to experiment with. First step was drying both filaments with the drying cycle in the X1 Carbon. Then … did some intricate parts using mostly stock settings in Bambu Studio.
Many of the parts like hinges had the support material fused to the part. Cleaning up took significant time with a razor knife, dental pick, needle-nose pliers, etc… Surface finish was not the best where it was mechanically separated.
Some of the areas using the support filament peeled away in seconds which was a total joy to use. Additional cleanup was unnecessary.
Any ideas on what settings to change to fix this? Is the support material too hot? Any thoughts would be much appreciated.
The gap between the support top and part bottom may help. Go too bug and it the part surface will be stringy though.
You may be slightly over extruding one or both of the filaments. The in-the-printer dry method, in my experience anyway, isn’t nearly as effective as the Sunlu driers I bought.
CF does tend to stick to support material a bit harder than regular filament. The whole point of the CF is to improve the strength of the layer bonds, after all.
You shouldn’t have to increase the top/bottom support spacing, but going from zero to some small fraction of the layer height, it won’t hurt to try.
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When you select support, a dialog box pops up suggesting changes to Z distances among others. It wants to set the distance between the support top and the parts bottom layer to zero. I find that zero causes the support to fuse to the part. I answer yes to the dialog but then go straight to top Z distance, I usually bump it back to 0.2 but just now wondered if using the layer height might also work.
I don’t think this is the recommended approach, but lately I have been using ASA for the support interface with PAHT-CF. It separates so easily that sometimes the prime tower even splits in half just from removing the build plate from the printer.