Cura: [4.7] Support is printed where it shouldn't

[GMagician]

Application version
Cura 4.7

Platform
Win10

Printer
Ultimaker S5

Reproduction steps

1. Open project
2. Slice it

Screenshot(s)

Actual results
Base support is printer on whole base

Expected results
An hole in support should be present

Project file
bug.zip

Additional info
Disable option to automatically place items in plate

[nallath]

Change the value of "support merge distance" to zero. The round circle is simply too small and it is filled by the merge distance.

[GMagician]

@nallath thanks for your answer but I can't find any "support merge distance" option

[rburema]

@GMagician I think it's support _join_ distance.

[GMagician]

@nallath & @rburema it doesn't work either

[GMagician]

@nallath & @rburema I found why it's not working and how to let it works, but it's a bug to me.

Overriding value where you see in picture: it doesnt' work.
With such override I enabled supports in print settings and I wrote 0 there in "support join distance": it doesn't work
With override 0, print setting->support join distance 0 I re-disabled support enabled: it works!

I think that that's definetively a bug, even if not the original posted

[rburema]

That is strange indeed. I'll at least reopen it, and then we'll rediscuss how much priority this should get.

[Ghostkeeper]

We had an incongruence here in how the setting is displayed in the front-end and how the setting behaves when slicing. Basically, the problem was that the front-end thinks it's a per-object setting but the back-end gets the setting value as a per-extruder setting (from the Support Infill Extruder).

Here's a workaround for you:

1. Enable support.
2. Set Support Join Distance to 0.
3. Disable support again.

It then shows the hole as expected.

I've fixed this for 4.8. The changes I made are:

• The setting can no longer be added as a per-object setting.
• The setting will show up now if support is disabled but there are support meshes in the scene (so you don't need to enable-change-disable support any more).

Same goes for Support Horizontal Expansion, which had the same problem.