Break two pieces

[TERRYH]

Why is it when you try to break a line or arc into two pieces or more and it does not work yet it creates a copy of the like or arc? been this way for some time 2023, 24

[Aaron Eberhard]

I don't use break two pieces often (normally just use trim, ahem, sorry, Dynamic Trim!, set to break), but I just tried it on a simple circle with a line intersecting it in 2024 and it seems to break as intended?   Was there a different scenario I should have tried?

[TERRYH]

What I use it for is to create patches to cover holes on top of a contoured part being rastered with a ball mill to keep the tool from going into the holes. See attached picture, Most of the time power surface does not work so I'll create a line around the top of the holes (counter bores for bolts drilled from bottom) then I'll break that line into 4 segments and use loft to create the patch (surface) to cover the hole. In previous versions it used to never do this, can't remember where it started but it has done it in 23-24 I only do it this way as a work around because something else does not work properly.  I did just try power surface on these simple contour parts and it did work good enough for what I need it to do. In the past on larger and more complex contours it would give me what was needed and I would use the other method.

 

[StevenM]

I can't answer anything for the "break," function, but in your example you posted can you just use model prep, modify feature, delete? I can usually delete 99% of holes like the ones in your picture, occasionally I get the odd one or two that won't delete.

[Colin Gilchrist]

Hi Terry,

1. I make a copy of the solid, on a new level, and typically in a new color.
2. I run "Remove History" on this 2nd "Manufacturing Model".
3. I then use the "Modify Feature", set to "Remove Feature" to remove the "hole" going through those solid faces.
4. (Note: check the back-side, and first remove any counter-bore, or chamfer features, before removing the "through hole".)
5. Note2: You can "double click" on that cylinder, to have Mastercam "attempt to recognize and identify the whole feature".

[Aaron Eberhard]

2 minutes ago, Colin Gilchrist said:

Hi Terry,

1. I make a copy of the solid, on a new level, and typically in a new color.
2. I run "Remove History" on this 2nd "Manufacturing Model".
3. I then use the "Modify Feature", set to "Remove Feature" to remove the "hole" going through those solid faces.
4. (Note: check the back-side, and first remove any counter-bore, or chamfer features, before removing the "through hole".)
5. Note2: You can "double click" on that cylinder, to have Mastercam "attempt to recognize and identify the whole feature".

Or you can just have it leave it on "add" and create a plug that can be selected.

The even lazier way (if you have it) is to use Unified, on the linking page make sure your Small Gap size is larger than the holes.

[BSmith23]

Terry

Does the Fill Holes option in Surfaces not work for these features?  In cases where it doesn't work, I just use Curve One Edge in Wireframe to outline the holes, then use Line Endpoints to connect the straight lines inside those outlines, then you can use Net Surface or Flat Boundary as needed.

[TERRYH]

17 hours ago, BSmith23 said:

Terry

Does the Fill Holes option in Surfaces not work for these features?  In cases where it doesn't work, I just use Curve One Edge in Wireframe to outline the holes, then use Line Endpoints to connect the straight lines inside those outlines, then you can use Net Surface or Flat Boundary as needed.

yes it works when there is a single surface around a hole and I use it where I can, however if there are 2 or more around a hole like on this part it does not work so well.

On 8/7/2023 at 2:44 PM, Colin Gilchrist said:

Hi Terry,

1. I make a copy of the solid, on a new level, and typically in a new color.
2. I run "Remove History" on this 2nd "Manufacturing Model".
3. I then use the "Modify Feature", set to "Remove Feature" to remove the "hole" going through those solid faces.
4. (Note: check the back-side, and first remove any counter-bore, or chamfer features, before removing the "through hole".)
5. Note2: You can "double click" on that cylinder, to have Mastercam "attempt to recognize and identify the whole feature".

For some reason I could not get this to work, not sure of I am doing it wrong or if it has something to do with how the part was designed. 

[TERRYH]

On 8/7/2023 at 2:44 PM, Colin Gilchrist said:

Hi Terry,

1. I make a copy of the solid, on a new level, and typically in a new color.
2. I run "Remove History" on this 2nd "Manufacturing Model".
3. I then use the "Modify Feature", set to "Remove Feature" to remove the "hole" going through those solid faces.
4. (Note: check the back-side, and first remove any counter-bore, or chamfer features, before removing the "through hole".)
5. Note2: You can "double click" on that cylinder, to have Mastercam "attempt to recognize and identify the whole feature".

I got this to work on one part on all but one of the holes gave me an error, on another part it worked on all but 3 holes and gave an error. On both parts it worked on all the bottom thru holes the errors were given on the top counterbores.

[Johnward Holmeson]

9 minutes ago, TERRYH said:

I got this to work on one part on all but one of the holes gave me an error, on another part it worked on all but 3 holes and gave an error. On both parts it worked on all the bottom thru holes the errors were given on the top counterbores.

In the cases it does not work try using push-pull to extend the hole (if blind) out of the part and then delete the now boss feature. 

[Thad]

16 minutes ago, Johnward Holmeson said:

In the cases it does not work try using push-pull to extend the hole (if blind) out of the part and then delete the now boss feature. 

I use a similar technique when it fails, but I go the other way with it and push/pull the hole smaller. Like you've seen, Terry, It seems to fail if there are multiple surfaces that span the hole. I use push/pull to make the hole smaller until the hole only has a single surface surrounding it, then it will delete every time.

[#Rekd™]

If the solid has no history you can add history then suppress these features. I would do this on a copy of the original on a new level.

 

[Johnward Holmeson]

15 minutes ago, #Rekd™ said:

If the solid has no history you can add history then suppress these features. I would do this on a copy of the original on a new level.

 

oooh.  I like that.