Very Buggy Extrude From Object To Object - "Cannot Complete Extrusion" Error

[therealsamchaney]

Hi, I found some very buggy behavior in the current version of Fusion (2.0.10440) when using extrude. 

When doing an extrude cut with multiple profiles from an object (a face of the body to be cut) to an object (the opposite face, which is also the sketch plane), I get an error "Cannot complete extrusion. The extrusion profile falls outside the boundary of the selected body. Select a face or plane instead, or adjust the profile so that it falls inside the boundary of the selected body."

This error message doesn't make any sense as the object selected is a face, and the profile is inside the boundary of the selected body.

Strangely, if I select only 3 of the 4 profiles, it extrudes just fine, but when I try to select all 4 I get the error. In my tinkering moving things around and trying different sized profiles, there is no consistency to this behavior. Sometimes, it will only let me select 1 profile and no more.

To show why you might want to do an extrude cut from an object to the sketch plane like this, I was originally trying to make counterbore screw holes that go from an angled (drafted) face to a flat (perpendicular) face, which seems like a common use case. In that scenario, you can't use the Hole from sketch tool because you would have to make the sketch on the angled plane and if you did that, the holes would go out perpendicularly from the angled surface which isn't correct. I've included a draft in the attached model to show this but it's currently suppressed because it's not a necessary part of the bug behavior. 

Please download the attached model, edit the extrude and try to add the third circle profile. You should get the error message. Try moving around the profiles, or adding more.

What can be done to fix this?

[jeff_strater]

yeah, seems like a bug.  I don't understand what you are trying to achieve here, but I agree this should work.

[mango.freund]

hi,  @therealsamchaney  unfortunately i can't find any errors. everything seems to be working very well.

greetings mango

[therealsamchaney]

@jeff_strater Thanks for the quick reply. This model is just a demonstration of the  bug, not the actual design I was working on which I can't post because it's IP.

The other design I'm working on is basically a slanted box with counterbore screw holes. I've attached a simplified design to get across what I'm trying to do. Look at the two extruded cuts at the end of the timeline. They should include all 4 profiles, but I can only select one.

Imagine you are designing a box with a lid, but it has an angled (drafted) bottom. You want to have screws go through the bottom, up into the lid to hold it together. So, you need counterbore holes, so the head of the screws can fit into them and won't stick out. The holes should be perpendicular to the lid, not the bottom which is angled. So, the sketch plane should be the lid (or the top of the base). You can't use the Hole tool because it unfortunately doesn't have a "From Object" option, so extrude is the only option left. 

That's why it is very useful to be able to do multiple extruded cuts from object to object like this.

[therealsamchaney]

@mango.freund That's because you're using  an offset from the profile plane as the starting plane. The bug only happens when you use "Object" and select a different face or plane as the starting plane. 

I need to select a plane as the starting plane for what I'm trying to do, and I'd say it's a pretty common use case. See my comment to Jeff and take a look at this simplified slanted box model. Try editing the last two extruded cuts and include the other circle profiles. You'll get the extrusion error.

[jhackney1972]

Your example works but you are not replicating what the original poster specified as to the conditions of the extrusion.  He said:

You used "Offset" as you start plane, not "From Object".  Screen capture taken from your model, on my system, and a copy of your posted screen capture.  

[mango.freund]

Hello @jhackney1972  yes, you're right, but an offset is from the object with an offset. that's what it's intended for. i don't hit my back when i have a leg pain, hahahhaa  😀.                     greetings mango

[therealsamchaney]

This post is to inform Autodesk of this bug, I'm not looking for alternate ways to achieve the end result. The example was just to illustrate the bug. I know I could use an offset from the sketch profile plane and just have the extrude go the other way out the bottom. The main point here is that you should be able to extrude multiple profiles from an object (face) to another object without issues but you can't due to this bug.

[mango.freund]

[CarlConquilla]

I too still have this problem doing a very simple extrude. 

What I am trying to achieve is this:

But I should be able to achieve it via a single direction extrude with two planes defined as start and endpoints according to these parameters:

This is a strange bug and you should be able to achieve this regardless of if your intended extrude crosses the sketch plane.

Bug description (to my understanding):

"Body cannot be extruded from Start Object to Extent Object when the body that would be extruded would span across the Sketch Profile Plane."

[intelinc]

I also run into this issue with increasing frequency as of late. It's genuinely frustrating.

[Steven_Gao]

Thanks guys for reporting this problem in here! I have logged an internal defect to ask development team to take a look. FYI, the internal defect ID is FUS-116774. 

Thanks,

Steven

[hansvaneven]

Still a bug here in current version of Fusion 360, so that's more of a year later, I remember in some cases making it to work but for now it doesn't when I open a file made with this feature it works, but as soon as I try to edit it the feature breaks, please update this it's really an annoying issue, thanks 

[g-andresen]

Hi,

please share a sample file for reply

günther

[hansvaneven]

Hello, please download this file here (Imperial) Parmetric Fretboard V3 for demo as I can't share my own file using this https://grabcad.com/library/parametric-fretboard-v2-2  

1. Then do go to this point in the timeline (Extrude3) 
2. Remove Object (green), and select the fingeboard top face again (object) 
3. gives an issue and error here

impossible to make it work while it worked in the original file until you edit it, this has been a problem since a long time, I had it work in some rare cases but sincerity don't know why this doesn't work 

thanks,
Hans 

[g-andresen]

Hi,

I have followed several scenarios in a new file and found that the option „From Object“ generally does not work with "Thin Extrude".
Extrusion of profiles is partially possible, depending on the size and shape of the object.
The screenshot shows the successful extrusions "From object" (yellow).

In each of the other cases: No object to cut

Starting a new thread could be helpful for a better perception.

günther

[hansvaneven]

Hi, thanks fore your reply and example !

I found a workaround in my case to use a point instead of a a face for the object (from object), for some reason this works nice instead of using the whole face of the object. Not sure why but at least it made me finish the job here. 

[CarlConquilla]

Thanks for this @hansvaneven I will keep this in mind and try the point reference.