Strange Gap In First Layer

[FLSUNNOTFUN]

Has anyone ever had this problem? It looks like an under extruded first layer, but its only on the outer edges of the print. I tried adjusting the first layer flow % but it did not appear to fix the problem. How do I fix this? I am using Cura for slicing. Also, not sure if the issue is related, but I can't get the raft to separate from the print since encountering this. It seems like air gap settings don't help as I've tried .2 to .6 with no improvement.

image 9.jpg

[curious aardvark]

why are you using a raft ?
take away the raft and you take away a lot of problems.

If you need better bed adhesion - get some magigoo (dimnafix is better, but I'm not sure if it's still available).

[FLSUNNOTFUN]

I print with a raft because I get a much nicer/smoother finish on the bottom of the print. I've never been able to get good results without using a raft. I get good bed adhesion when trying to print without a raft but the print looks rough on the bottom.

[FLSUNNOTFUN]

I just tried printing the same piece without a raft and it still has that first layer gap like in the picture above. I never used to have this problem. I've tried various settings (for days) and even gone back to the default slicer profile which used to always be a good baseline for decent prints. I have no idea whats going on.

[curious aardvark]

sounds like a design fault then - got a link to the stl ?

[FLSUNNOTFUN]

How do you inset/attach a file here? It's just a 25mm x 25mm x 5mm block.

[FLSUNNOTFUN]

I solved this problem by adjusting my Z offset from .8mm to .1mm. The gap is gone now.

[curious aardvark]

yeah - lol - that'll do it all right :-)