Profile follow the path in spiral way

Rhino
,
1

Hi

my name is felix , I am starting with rhino just a couple months ago .

I have a problem , and i will apprecciate your help !!!

years ago , an engineer that worked for the company that i am working now ,
he prepared the 3d geometry and make the wrap of the profile along the path and the result was very good ( see image )

now i have to prepar another file but with different dimensions but i already tried many times and in different ways and the result is not soo good ( profile was deformated and stay out of the 3d geomety borders )

as we can see on the right image the profile follow the path and always keep tangency
1434-ask.3dm (1.1 MB)
to the borders of the 3d geometry.

is there any person who are able to give a good advise ?

thanks in advance for your help
best regards
Felix

image
image1464×684 101 KB

2

Hi Felix - is this what you are after?

1434-ask_Maybe.3dm (817.7 KB)

-Pascal

3

hi Pascal

thanks for your quick response

Nop , this file is the one that i found in my co worker ’ computer

as you can see the result in the file is pretty good

thanks

4

Hi Felix - the object in the file I posted is one I made just now using RailRevolve on the full helix -

image

if that looks good to you I guess you can use the same technique for your new object. Note the profile curve was cleaned up - it was self intersecting in the file you sent.

-Pascal

5

Hi Pascal

thanks for your reply , let me take a look

i will inform you

best regards
Felix

6

Hi pascal

I already did the overlap between both wraps , the one form my co worker and the one the you sent me

it seems like a , the one from you is not align and not tangent to the 3d geometry

I already changed some options but the result is the same

see attache picture

any advise ?

thanks in advance for your valuable help

best regards
Felix

image
image957×669 153 KB

7

Hi Felix - I cannot tell, in the file you posted above, what parts of the file I should be looking at - most of the layers are off. Can you post a new file with just the helix, the profile curve, the base surface that you are working with as well as any other geometry that is important ?

-Pascal

8

Hi Pascal

of course , attached is the file already cleaned

image

4 layer :

1 . layer wrap from co worker which result is the goal
2 . 3d geometry ( wrap has to align an tan to the 3d geometry)
3. path to follow
4. profile to wrap

1434-ask.3dm (4.1 MB)

hoping that you can help me

best regards
Felix

9

Sorry, Felix, I do not see these layers in the file you posted…

-Pascal

10

Hi Pascal

so sorry ,

pleasde see attached file

1434-ask REV 1.3dm (3.9 MB)

best regards
felix

11

Hi Felix - does this portion look correct?

wrap start.3dm (285.5 KB)

-Pascal

12

woooow !!!
looks good !!!

13

OK, I’ll see if I can lay out the steps I’d use here.

-Pascal

14

thanks

I will appreciate it

thanks again

15

Hi Felix - the first thing I’d do is clean up at the start of the wrap - make sure the curves are where you think they are and tangent to the surface edge there:

image

Then offset the helix normal to the surface to the depth of the wrap profile
image

Then copy the helix curve forward and back to the ends of the wrap (Blue) and Pull these onto the surface (Cyan)

image

Now you have the forward and back extents of the wrap on the surface - now, I did this with the curves you have in the file and a Pull of the copies is a bit approximate it occurs to me that a better way to get these curves might be to Pipe the helix and intersect the pipe and the handle surface -

image
image446×506 28.1 KB

Either way, close off the gap between the ends of the forward and back curves with extracted isocurves trimmed to these curves then Trim the surface:
image

Now you can create two Sweep2 surfaces along the central curve and each (front and back) helix lying on the surface:

image
image934×492 85.6 KB

image

The ends will need cleaning up:

image

You can Explode the sweeps and MatchSrf the ends like so:

image
image824×658 81.1 KB

image

image

1434-ask REV 1_PG.3dm (5.4 MB)

-Pascal

16

hi Pascal

I really appreciate your help !!!

let me follow up your direction and duplicate the file hhihih

thanks again
i will let you know my progress

best regards
Felix