Hi to all. I wish to draw a segmented unit with the top area splayed to a 3 degree taper. This unit will become one of 60 segmented units making up a ring of 508mm diameter. Could someone please assist?
Regards,
Segmented Ring with 3 degree splay on top.skp (45.9 KB) TropicalGuyCns
I used follow me tool, first starting with a face which I modified from a square to have the 3Ëš splay you requested. This makes the toroid shape, if you need the segments dividing edges to show I added them in with rotate/copy.
Now, do you want 60 of these arrayed at 508mm diameter, they won’t fit.
Or do you want this shape but with 60 faces @508 diameter?
Hi Riley,
Thanks for the prompt reply. Perhaps I have not explained correctly. The segment that I drew has to be cut on a 3 degree slope across the top of the segment. ( In actual fact it should be 6 degrees combined, then when all 60 segments are cut they are stood on there side, once that is done it forms a ring with a Diameter of in this case 508mm. a circumference of 1595.12.
I hope that is more accurate in way of an explanation.
TGC.
I have attached another drawing .
TGC.[Segmented Ring with 3 degree splay on top.skpSegmented Ring with 3 degree splay on top (5).skp (37.7 KB)
Your models don’t really correspond with your text. The sizes are odd.
From your description I get this.
I’m super confused. “each vertical side to have a 3˚ cut” can you do a pencil drawing on paper?
Hi Box,
Sorry for the confusion. The project is to make a ring ( 1595.12 circumference) from segments, each 100mm dia x 40mm h x 25.4 t. of which there are 60 segments. At this stage the segments are parallel, they need to have a 3 degree bevel on each side standing with the 100mm up. I did put another sketch before this reply. maybe that will help explain.
TGC
That left me more confused.
If I array 60 of these items when upright @508mm diameter they overlap like crazy. Should these be resized to make it work like this?
OK, this video will show what I want to achieve.
TGC,
I’m not going to watch an 11min video, but all you need is a donut drawn with a 60 segment circle, the segments that produces would do the job.
This will make it quicker to follow. Skip to 1 minute 48 seconds, then 2.30 then 3 .44 for the completed ring.
TGC.
Box,
The small 12 sided ring in the middle is what you have to start with to get various colour combination etc. and to finish up with the final ring size of 1595.12 you need 60 and to get them to fit you need to slice 3 degrees off each vertical side of the small ring. I have made these and that system works, My idea of working in SU is to work out all the necessary problems before you start wasting timber.
TGC.
I think I get this now.
Riley ,
That’s it, can you explain briefly in words what’s happening.
TGC.
I took a face that was a cross section of the shape you want. Moved it 254MM away from center (radius of the circle you want) then drew a random circle on center with 60 faces. Follow me tool makes the final toroid shape with 60 sections.
I could be done there. But assuming you want to examine each piece separately, I choose one segment (turn on hidden geometry to help see) and draw a few edges on the top and bottom to make it a complete section. Then I carefully select that one section only and copy it. Then I delete everything I have made, its a fun step! Using Paste In Place I put back the one section I had copied in it’s same previous correct location, I un-smooth all which is a product of the follow me process and I have to do a little clean up with some extra lines to hollow out the center. Then I make a component of that and rotate/copy it 59 more times.
EDIT: I did leave the whole thing with the backside faces outward which is poor form, I should have reversed all faces, or just started with the original face reversed.
Thank you both for your time to explain to an Old Fella that cant see to well these days.
Regards.
TGC.
Sorry I had to rush off, but Endless has sorted you out.
I’ll give you this option as well as it may help you understand the construction of the shape.
By the way, due to segmentation you can get variations in circumference depending on how you structure it. You wanted 1595.12 and I got 1595.929068 mm
@Box’s is a very fast and elegant method. One thing to note which probably does not matter in this context is that the selected face does not change it’s shape as it is rotated to 3˚. It becomes a hypotenuse with it’s original 100mm dimension, and therefore changes the total OD dimensions of the original geometry very slightly.
