face-split circular surface

  • Last Post 13 March 2019
  • Topic Is Solved
usama posted this 06 March 2019

I used a face split command on the

circular surface but it does not split the surface into two regions please guide me in this case. see in the attached figure.

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peteroznewman posted this 06 March 2019

Create a plane, and use Slice. Select the two pieces and Form New Part.

usama posted this 06 March 2019

I did the same thing as you told me but no working dear Peter. actually, I want to split the face by an arc see in the figure same process but does not work. its a surface and I want to cut it by an arc. please have a look on the figure 

rwoolhou posted this 06 March 2019

Move the plane that the arc is on in the z-direction to get it off the plane. Then extrude & slice or imprint (can't remember which): make sure the arc sticks out beyond the edges of the face. 

peteroznewman posted this 07 March 2019

It is the XY plane of the Plane selected that does the slicing. If you didn't orient the XY plane to be the cutting plane through the body, then you would see no effect, but if you correctly orient the Plane, then it will slice the body in two. I have not seen it fail to slice. Please show a screen snapshot of the plane you are using to slice.

kkanade posted this 07 March 2019

you can create a line from from that sketch of arc. 

then use tools - project to project this line on surface. this will split the surface. 

usama posted this 08 March 2019

i did this what you say but can not working and also apply peter and kkanade method may be i am missing something please guide or i can attach my geometry or tell me any video regarding this. see the attached figure. please tell me where the extruded surface go after slicing? because i need a 2D surface. please check the figure. 

peteroznewman posted this 10 March 2019

Please attach a Workbench Archive .wbpz file if you still need help.

usama posted this 11 March 2019

the file is attached in upper post because i can not be able to post it while replying you.

rwoolhou posted this 11 March 2019

You may need to move Plane13 off the plane the geometry is on: I've found imprints/extrude for cuts not to work well when the planes are coincident. In the Plane13 definition there will be an option to offset in the (probably) z-direction. The offset only needs to be a few mm. 

usama posted this 11 March 2019

Dear rwool hou I moved the plane 13 offset in z direction then use extrude cut command in the reversed direction. I moved the plane from base plane about 1mm then use extrude cut command in reversed direction but not working. Please explain further.

Attached Files

rwoolhou posted this 11 March 2019

The extrude+cut should slice the geometry: assuming it does pass through the surface? 

peteroznewman posted this 11 March 2019

I don't see any attached files.  It has to be a .wbpz Archive file. Don't attach the .wbpj file as that is not useful and so is not permitted to be attached.

usama posted this 12 March 2019

Dear Peter Please check the attached file in upper reply. and also guide me on how you did this.




Attached Files

peteroznewman posted this 12 March 2019

You have successfully split the surface, I applied an inflation layer to the edge you created. What more do you want?

usama posted this 12 March 2019

But it can show as seprate faces. What method you used here? And if you used same method as the attched geometry then how to remove the offset plane on the geometry. If you can please attached the geometry then it will easy for me to understand.

peteroznewman posted this 13 March 2019

I did not touch the geometry you provided, I just added a Mesh. 

Are the two attached files identical?  They have the same name. I used the second attached file.

Attached Files

usama posted this 13 March 2019

Dear Peter Both files are identical Regards Usama

usama posted this 13 March 2019

Dear Peter In reverse extruded length 1.01mm but I moved offset z plane 1mm. my question is length should be the same or reverse extruded length should be greater than the moved offset plane length? 

thanks for help



peteroznewman posted this 13 March 2019

The idea when using a line or a surface to cut a body (surface or solid) is that the cutting geometry should start outside the body to be cut and extend past the body to be cut.  The line or surface should have a greater lateral extent than the body being cut, if possible.

The idea is to avoid geometry that is just touching because small tolerances in the geometry can create gaps that hurt the downstream use of the geometry.

If you understand these ideas, you will know what to do in any situation.  Sometimes the touching is unavoidable because you want a tangent condition. In that case, you have to hope for the best.  Most of the time it works.