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Topic ClosedLofting problem
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Mali Zeleni View Drop Down
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Joined: 06.Sep.2014
Location: Croatia
Using: AutoCAD 2014
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Points: 8 		Direct Link To This Post Topic: Lofting problem
    Posted: 06.Sep.2014 at 16:36
I prepared closed profiles for lofting, but I encountered a problem. Can somebody tell what could be the problem?

Here are some picture illustrating the problem:

Profiles in red denote the place of irregularity in the lofted 3D solid.



Thank you for any help.

Kind regards, Hrvoje
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John Connor View Drop Down
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Joined: 01.Feb.2011
Location: United States
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Points: 7175 		Direct Link To This Post Posted: 06.Sep.2014 at 18:16
A copy of the drawing would be needed to troubleshoot the problem.
"Humans have a strength that cannot be measured. This is John Connor. If you are reading this, you are the resistance."

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Mali Zeleni View Drop Down
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Joined: 06.Sep.2014
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Points: 8 		Direct Link To This Post Posted: 06.Sep.2014 at 19:57
Thank you John for your answer. Here is the file with the drawing:

uploads/497931/VL_za_krmenu_protustatvu_-_2.dwg

In the meantime I found out that the closed profiles are not of the same type. There are polylines (green), splines (yellow) and 3D polylines (blue).


In the next step I added one profile on the place where the solid has discontinuity in the form. The first blue line, lower. Also, I started to loft from the top (!?) and the form was better.
On two places I have the irregularity in the surface. I don't know yet, how to solve this problem.
Kind regards, Hrvoje
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Mali Zeleni View Drop Down
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Joined: 06.Sep.2014
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Points: 8 		Direct Link To This Post Posted: 06.Sep.2014 at 21:02

If I avoid critical part of the solid it looks fine. Smile
Now must find the way how to close the gaps.
Kind regards, Hrvoje
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John Connor View Drop Down
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Points: 7175 		Direct Link To This Post Posted: 06.Sep.2014 at 22:18
I guess you aren't going to upload a copy of the drawing.  OK.  Good luck.
"Humans have a strength that cannot be measured. This is John Connor. If you are reading this, you are the resistance."

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Mali Zeleni View Drop Down
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Points: 8 		Direct Link To This Post Posted: 06.Sep.2014 at 22:19
If I use each third profile solid looks much better. Also the geometry is not accurate as it can be.
Kind regards, Hrvoje
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Mali Zeleni View Drop Down
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Joined: 06.Sep.2014
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Points: 8 		Direct Link To This Post Posted: 06.Sep.2014 at 22:21
Originally posted by John Connor John Connor wrote:

I guess you aren't going to upload a copy of the drawing.  OK.  Good luck.
Yes, I uploaded the copy of the drawing in one of the previous posts (at 20:57). I will check if I can open it.

P.S. I checked: it is possible to open the drawing.


Edited by Mali Zeleni - 06.Sep.2014 at 22:26
Kind regards, Hrvoje
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Mali Zeleni View Drop Down
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Points: 8 		Direct Link To This Post Posted: 07.Sep.2014 at 21:43
I refined the geometry and the 3D solid looks better.



I still have two places on the solid which should be put in order.
Is the lofting bad approach for such body? I see that only one surface is not good: all surfaces located in one plane are OK. The flow of lines on curved surface seems to be "drunk".

Here is the copy of the drawing:

uploads/497931/VL_za_krmenu_protustatvu_-_2_-_Copy.dwg

I thank for each answer.




Edited by Mali Zeleni - 07.Sep.2014 at 21:59
Kind regards, Hrvoje
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John Connor View Drop Down
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Points: 7175 		Direct Link To This Post Posted: 08.Sep.2014 at 12:24
Looks like you are getting helped over at CADTutor so there is no need to continue the conversation here.
"Humans have a strength that cannot be measured. This is John Connor. If you are reading this, you are the resistance."

<<AutoCAD 2015>>
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Mali Zeleni View Drop Down
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Joined: 06.Sep.2014
Location: Croatia
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Points: 8 		Direct Link To This Post Posted: 08.Sep.2014 at 13:26
Originally posted by John Connor John Connor wrote:

Looks like you are getting helped over at CADTutor so there is no need to continue the conversation here.
Consequently, because I am the member at CADTutor forum, there is no need to be the member of this one. Right?
Kind regards, Hrvoje
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