Unnecessary PVA support on the outside of the part

[Kortben 1]

Hi

I have just bought an UM3 (upgraded from UM2+), and have now finished my first print with PVA support.

Can some of you tell me why Cura makes a lot of unnecessary support on the outside of the parts, when I´m using Extruder 2 (PVA) for support print?

/Best regards KP

[DidierKlein 729]

Hi,

This is because you ticked Ooze shield in the options

[Kortben 1]

Hi,

This is because you ticked Ooze shield in the options

Yes - you are right.

Thanks a lot.

[kmanstudios 1,120]

As an aside, I am starting to prefer the ooze shield to the priming tower. Does eat up a lot of PVA though. But, I am recycling it (PVA), so it serves other purposes for me too.

[jasonharjo 0]

My ooze shield is not enabled but I still get unnecessary supports on the outside of the part... This is only with PVA. If I change support back to extruder 1 which is PLA the support is only where needed.

[kmanstudios 1,120]

Change the horizontal expansion for the extruder that is putting too much on there. Also, check the angle differences between the two extruders that are default values when using support.

[Matioupi 1]

I also noticed this and reported on CURA github :

https://github.com/Ultimaker/Cura/issues/5500

 

Answer so far is that is it a know but hard to avoid behaviour...

[kfsone 5]

@Matioupi It's controlled by this, if you don't have it visible, search settings for it:

 

Infact, search for "horizontal expansion" to make sure you don't have the regular one set too.