Finished a print last night off my new X1-carbon. Primary filament was Bambu PA-CF, which had (pretty much) succesfully printed a Benchy in just prior to this.
More or less what the object is supposed to look like geometrically /dimensionally speaking:
However, the was my first print mixing filaments from the AMS together in one print, specifically the PA-CF paired with Bambu Support-G filament (green).
The main issue I had from the print is the layers immediately between the supports / support interfaces did not fuse together properly, leaving a few layers of stringy filament before getting into infill. Images for reference:
My settings changed from default are as follows (pictures included also):
Layer Height: .16
Enabled thick bridges
Enabled support
-on build plate only
-support critical regions only
Raft layers: 2
Support filament: pa-cf
Support interface filament: support-g
Dont support bridges enabled
Another thing I noticed in this print but not others, is what I would call dimpling on the top most layers. I’m not sure if something as simple as increasing top wall layers or turning ironing on might fix this.
Other more minor issues that continue to persist for me in all prints:
Imperfections at the apex of overhangs / small radius corners. You can see examples on all the “6’s” on the current print as well as in Benchys printed in Bambu PA-CF and Bambu PLA.
Oh I just posted a similar issue…I’m just using pla…but didn’t think of identifying it as non fusing extrusions but that makes sense. Looks like mine…so it’s not seemingly material based if that helps
Was the unfused part of your print intergacing with supports, particularly oriented down towards the print bed?
My problem eventually came down to a mismatch of layer heights between my model and my support interface.
Something like:
Layer Height: 2mm
Support Interface Layer Height: 1.6mm
I don’t remember the exact parameter names and numbers right now, but basically I was leaving too large a gap between the interface and the model to succesfully lay down that first overhang layer.
Bit late I know. When using support interface material the Z top and Z bottom distances are best set to zero. I am pretty sure the latest Studio version added a warning suggesting this when you select a different material for support interface.
So far my limited experience is using PLA as support interface for PETG and vice versa. I don’t know if ‘real’ (and real expensive) Bambu support material is any better (or why it would be) but I have noticed weakness in prints above the interface layers which I attribute to contamination of the print material by support material left in the hot end. IMO you need a lot of purge volume when changing back from support material.
You could try slowing down the print speed, increasing the temperature, and the increasing the extrusion multiplier at the support interface in an attempt to get better fusion within the layer
@mrhv not sure if you’ve resolved this yet, i had a similar issue mixing pla & petg, also on the first day of owning my X1.
i believe the problem is the flushing volumes;
i’ve seen on the web that people are setting these to 800 so that the previous filament doesn’t print embedded into the current filament.
Same issue. All of my prints that required supports, they failed at the interface. Even more worryingly, the ai never detected spaghetti or air printing, and continued to print as normal. Im suspecting its something to do with the “independent support setting” and that its “invalid” if prime tower is used. Which to mean it means that it ignores any change to top-z and the interface should be fused to the supported surface. But no, in the photos you can see the area even warping and lifting away and even spaghetti… SMH seriously 2.5 for something my p1 and nep4 tackle like nothing… and nep4 isnt even supposed to be printing ABS…
BBL solve this, PLEASE, i love the printer but this is just breaking it for me…
