First Layer when support enabled (v2.7 +)

[Reflector36 0]

I cant find a setting to disable the first layer when support is enabled. When disabled the first layer of the model is on the print bed as expected, but with support enabled i get a weird 1 layer raft like structure, no rafts enabled.

[gr5 2,172]

In settings try disabling the checkbox that makes the part always sit on the bed (cura settings - not slicer settings). Then use the move tool and move your part downwards by .5mm and see if that makes a difference. I'm wondering if most of your part is kind of up off the build plate.

[Reflector36 0]

Sorry for the late reply, i went back to 2.6.2 as it works without issues with all the models i tried. I have now downloaded the latest 3.1.0 and it still does this strange first layer when supports are enabled, I couldnt find the exact setting you mentioned, but i did find under general settings "Auto drop models to build plate", not sure if that worked. If i put the model to anything over -.1 it wont slice and greys the model as if its outside the build volume.

[Reflector36 0]

Sorry the "greyed" out was my mistake, the new "print head preview" was messing with me, yes dropping it down even -0.1mm works to remove that first support layer, but it doesnt answer why its there in the first place when the same models in older version of cura work normally

[MrLogston 1]

I have this same problem, tried Cura 2.7, 3.0, 3.2 with no luck

[MrLogston 1]

I used 3.2 with moving all parts down by typing in the z value -.32mm, a single layer height.  And success  

 

[gr5 2,172]

You probably could have moved it down less - did you try moving it down by only 0.1?

[MrLogston 1]

I tried moving it down slightly by dragging the arrow with no luck, not sure if it was .1, but worked as .32 and I just went with it, after two failed prints thinking my first layer wasnt sticking. Cleaning the bed for no reason..., I was happy to just get it printing.