Creating A countersink hole in a sketch

[Anonymous]

I have a tough time to create a countersink hole in a sketch. 

I have drilled holes Ø 3.4mm and want to make them countersink 5.7mm 90º.

When I use the hole/countersink function it appears 90º of the actual hole. I wonder how to get that aligned? It seems I do something fundametally wrong.  

[TrippyLighting]

Could you share your model, and maybe make a screencast so we can analyze what's going on ?

[TheCADWhisperer]

Did you use the Hole feature to create the hole?

You should be able to edit the Hole feature and change it to a Countersink type hole.

From your description it sort of sounds like you are trying to add a second hole feature to the original hole.

Or you should be able to simply use a Chamfer.

To use a Revolved sketch you would need to make sure you have a sketch plane going through the axis of the hole.

That could be significantly more effort than simply editing the hole type or using a chamfer.

As suggested, attach your *.f3d file here if you can't figure it out.

I am  curious about what you are seeing even if you are able to figure out an alternate solution.

Something about your description and the image you attached seems really fishy - not behavior that I would expect.

[Anonymous]

Thanks for your reply. In the meantime I did a new sketch and placed countersink holes just the way I wanted on it with the hole function - but when I want to put them in the right place with D I get an 'overrestained' warning.

Unfortunately I'm out now, but tomorrow I will look into your reply in detail and will see how far I get.

[Anonymous]

Ok, I can place the sinkholes now easily. 

But can't move them after placing them. They way I tried was 'D' and then enter the value (like 20 from each edge). But I  can't lock to the holes, or enter any value and get the 'overconstrained' error? How can I get around that?

http://autode.sk/1rjgZyK

[Anonymous]

I made a screencast of the initial error. I am a bit puzzled what's going wrong.

[TrippyLighting]

What you are doing in the screencast is not editing the existing hole, but adding a new countersunk hole tangentially to the existing one.

if you want to edit the already existing hole, you need to rightclick on the hole feature in the timeline on the bottom of the screen and select "Edit".

th pop-up dialogue will be the the same when initially adding the hole.

[Anonymous]

Thanks for the reply. Seems there is no timeline because I work on a design were I did a save as... before. 

But as a working workaround I added a chamfer to all the holes. That was quite easy.

[TrippyLighting]

Of course ther is a timeline!

The little screengrab below is from your screencast ad shows you timeline 😉

I did in fact miss something however.

The holes in you plate were probably created by drawing circles in one of the two sketches in your timeline. The singe extrude indicates that this one extrusion alreay might include the holes.

You cannot add these countersink features to holes created that way unless you do that manually as you've done now.

If you want to da that more comfortably with better control over the features and dimensions in one place, then you should use the "Create->Hole" tool and place the holes on the plate.

Here is a little screencast how to do this: