Brim on inner part of an object

[mrtinfy 2]

Hi everyone, I was printing a hub where the fan blades of a jet engine mount on but had an issue with the inner part of it, i added brim since without it the first layer started to lift in a one of the sharp corners, but the problem is that in the middle there is a gap between the outer part of the object and had trouble with adhesion in there so i was wondering if there is a way to add brim in the entire first layer including the center, kind of like a raft but just one layer, here is a pic of what i mean

I'm having problems in this center ring. even with brim enable in cura only applies to the outer shell of the object

Edited March 28, 2020 by mrtinfy

[Torgeir 228]

Hi mrtinfy,

 

Interesting hub you have here..

If I understand this right, -I would skip using brim and use PVA glue, this glue is sometimes a must in order to have success.

Dilute the glue in water 1:(20-30).  You just use a tiny layer and let it dry, sometimes you will need more than 1 layer, but be careful as it can make your print very hard to remove..

PVA glue is the withe colored glue we use for wood, so it should be easy to find.

 

Use the heat bed heated and with this glue.

 

Hmm., Don't you need support for the overhanging part on the outside of the hub? (On the part between the fan blade's root attachment.)

 

Good luck

 

Thanks

Torgeir.

 

[tinkergnome 926]

On 3/28/2020 at 6:43 AM, mrtinfy said:

even with brim enable in cura only applies to the outer shell of the object

 

There should be a setting named "Brim only on outside" - which is probably enabled by default.

I would disable it and check if it makes a difference.

(make the setting visible first or use the search function)

 

[geert_2 556]

You can always disable all brim in Cura, and design your own in CAD, exactly how and where you want it. I often do this when I want some features to have brim, and others not, or if I need irregular brim.