Working on an off plane object

Rhino Rhino for Mac
1

I made something that I want to modify. However the edges are oriented in a out of normal plane. This is I suppose more advanced stuff, but I’d like to know how to apply a chambfer to the end that will work on all the protruding corners.

2016-07-12_17-53-33.png1145×910 313 KB

2

have you tried ChamferEdge?

…otherwise, i’m not really sure what you’re wanting to do… what do you mean by applying a ‘chamfer to the end that will work on all protruding corners’?

3

I want to do this.

But while I can do so easily in a standard cplane, It’s not easy when the object is off angled.

2016-07-13_08-35-20.png1031×838 176 KB

I’ll have to replace the knurled twist switch in the lower left with the modified one center but then there’s an alignment task that so far is less than precise.

?

4

did you try Orient or Cplane command?
You can always use object snaps and guidelines - for example, create a line through the center of the shaft, use that to help you orient the cutting surface, etc.

5
  1. draw a circle by diameter from one of the protruding edges to the opposite one.
  2. do a line from centre of circle to one protruding edge.
  3. Duplicate opposite edge from 2.
  4. from end of line that is in the centre, do Arc tangent to curves, with From first point, to duplicated edge line. This will give you the dome like in your image, once revolved.
  5. to get axis to revolve curve around, do line normal to surface, end surface, from centre / end of line. doesn’t matter the length, this is just for revolve axis.
  6. revolve tangent arc around line from 5.
  7. trim the unnecessary sections from revolved surface & your original object.

or you could set c-plane to end surface and work from there like you normally would.

Without a model, this is just from my head, so I may be missing something.

IHTH «Randy

6

Thanks guys. [quote=“rhinorudi, post:5, topic:34378”]
draw a circle by diameter from one of the protruding edges to the opposite one.
[/quote]

In this case the points are not spaced such that any two are directly opposite. [quote=“raja, post:4, topic:34378”]
for example, create a line through the center of
[/quote]

But then there’s a way around it :relaxed:

I used the center line and then created a sphere at the end point, halved it and moved over the end for boolean splitting. I have a bit of trouble with the orientation of the gumball as it often moves itself to an edge of a surface. I don’t yet understand why this happens.

Anyway, I’m doing some renders of the model and will post them to the gallery by the end of the week.

7

run the command _CPlane
…choose the option 'surface’
click on the top surface of the gear(?)

customize the origin or just enter/enter for default.

…you can then work on that part as you’d do in the other example you posted in the thread.