derivatives component

[scra450]

Hello everyone, here I am with a new problmemino:

I should create a mold (right and left negative) of an object.
1) I have bound myself in a new set, "by annexing it", my part in a parallelepipedo.
2) in part I used the "derived component" command by subtracting the object to the parallelepiped.
3) with the command "division" on the xy plane I cut the parallelepiped so as to get the two parts.

the problem lies in the fact that the object is a loft processing between different diameters all on the same axis and therefore the subtraction of the object itself from the parallelepiped with subsequent division exactly in the middle, I should create curved profiles, but strangely I find some square profiles that sincerely do not know from where they came out.

I'll attach some photos to make your idea better.
the object in question I zebrated you to show that the surfaces do not have edges.

thanks in advance and the next

 

[Tarkus]

Hello everyone, here I am with a new problmemino:

I should create a mold (right and left negative) of an object.
1) I have bound myself in a new set, "by annexing it", my part in a parallelepipedo.
2) in part I used the "derived component" command by subtracting the object to the parallelepiped.
3) with the command "division" on the xy plane I cut the parallelepiped so as to get the two parts.

the problem lies in the fact that the object is a loft processing between different diameters all on the same axis and therefore the subtraction of the object itself from the parallelepiped with subsequent division exactly in the middle, I should create curved profiles, but strangely I find some square profiles that sincerely do not know from where they came out.
I'll attach some photos to make your idea better.
the object in question I zebrated you to show that the surfaces do not have edges.

thanks in advance and the next

the suspicious straight lines can measure them and then be sure they are straight lines?
It's not that it's just a visualization problem (type scgeda graphics that makes the cups) ?

 

[stefanobruno]

Have you tried to put on the table and see if the piece is really degenerated?

Bye.

 

[scra450]

I followed the advice to put the drawing on the table, but the result was worse than expected.
I don't know what to think anymore.

 

[Tarkus]

I followed the advice to put the drawing on the table, but the result was worse than expected.
I don't know what to think anymore.

can you post the file?

 

[davide75]

you post the file because I’m curious too to understand why of this view

 

[scra450]

Unfortunately I did not have permission to post the file.
However I noticed something:
the part that I had to subtract to the full is an empty object where I had eliminated the above processing to have the solid "full".
Trying with a copy of that object where I didn't empty the problem does not show up.
then I tried: before eliminating the emptying process, and the problem has been presented again.
then dragging the processing under the end of the part, and the problem was resumed.
in the end to suppress the processing... and the problem is resumed.
In short, the part must be "virgin" from the emptying operation otherwise inv.2008 does not digest it.
or maybe I make a procedural mistake somewhere.
Anyway, thank you for the interest next.

 

[scra450]

hi to all, if to someone could be useful, having a problem similar to mine, I solved it "by chance" in the following way:
practically in the part where I had done the processing of loft, I selected the aforementioned processing, modification processing and immediately ok without changing anything.
I repeated this procedure twice and all the problems I had disappeared.
Go know why.