Cannot create dome..

[Anonymous]

SO I cannot create dome in the center... I creaed spline and two arcs in the middle. When I try to loft these, it wonk work. I also tried using NETWORKSRF, but stilll havent been able to achieve it :(( What am I doing wrong here?

[Anonymous]

I almost get what you are trying to say. It`s just that base of dome and petals extrusion is by 5, not 3 (my bad) and the total count of petals are 10.

There is only 1 problem, How can I make that top surface of the petal (blue net form in locked layer) to solid form. Its just a surface... Should I patch it?

[john.vellek]

Hi @Anonymous,

Yes you should consider a surfpatch but first check that the profile of the petal is correct.  When I set it on your "petal-base" the "nose" doesn't quite line up and is not watertight.

Please select the Accept as Solution button if my post solves your issue or answers your question.

[Anonymous]

When i surface patch, it just fails... So to make nose watertight, i need to do what? Its the pnly prob for me... 😕

[john.vellek]

Hi @Anonymous,

To get the petal to a solid, I took the outline of the base and lofted the left side to the middle and to the right side. Then I used SURFPATCH to create the bottom. This seemed to work quite well. BUT, even though I selected SOLID for the loft mode I ended up with a LOFTED SURFACE. So, I used UNION to join the bottom and top of the petal and then used CONVTOSOLID to make it a solid.

I have attached my result.

Please select the Accept as Solution button if my post solves your issue or answers your question.

[Anonymous]

Thank you John Vellek for all your help!

Here is what I managed to achieve 🙂

All is pretty much good, xcept for dome, which didn Union correctly, but Check confirms that it is solid shape.

Since I Polararrayed solid object into 10 items and then used Union on it, it should be solid aswell, correct? 🙂

[beyoungjr]

Your model looks good but if you select it and use Properties you will see that it is an array object (not actually a Union-ed solid).  You can break up an array into its individual elements by using explode (only do this once because subsequent explodes will change things even more).

After Explode I see 11 solids and 2 polylines in the immediate area of your model (there are other objects a great distance away from your model.  The 2 polylines are; the polygonal shape below the model, and a boundary around one of the petals where it touches the base.

To make everything a single solid you can now use the Union command and select all of the 11 solids that make up your model.

I think you created a second forum post about this project so if you are satisfied with your outcome please mark both posts as solved and attribute to those who solved for you.

Nice little project

Cheers,

Blaine

[parkr4st]

getting close.  just a might of overlap of the petals.  sliced the base with the petal surface to get the solid for the petal. a side benefit is the "concave" top part of the sliced solid is the surface of a mold for the jello.

dave

second on the interesting, challenging type of work.

[Anonymous]

Okay, so i sent "flower.dwg" to my boss.

He said that my petals is extruded by 3 units longer, and he sees 11 solid objects not 1.

He also also sent his .dwg via email to me - Nd nr.2a_3D_mano ir tavo_AZ.dwg

There are layers:

"flower - mine" - is what I managed to draw

"flower - mine fixed" - is my flower, fix by my boss

"flower - objctiv" - is what I was supposed to draw.

So, I was thinking I can take the segment from "Ready for action with UCS2.dwg" and then copy it into 10 pieces total, rotate them by +36deg, and then use UNION on them. Since the wouldn`t be polararrayed, the object would consider to be solid. The Only thing I cannot achieve is dome. 😞 Because the on I have sent in flower.dwg, doesnt unite with the rest.

[parkr4st]

IMHO none of the dwgs you attached will work.  Zoom in in wire frame mode and you can see have gaps between the parts and will thus not union to make one 3d solid.

Your bosses has gaps between the petal top and base and the petals overlap and do not touch the center with zero clearance. 

ready for action.dwg has the same gap plus this one

until all those gaps are closed, well you know what.

I say start a new dwg and do not use any of the work done so far.  It will make your project easier.  draw a layer of construction lines to align each part to and draw very precisely and accurately and save often with a new file name between major steps so you can always go back to a point of success and try again.

Don't give up, once you learn the process the next project will seem easy 🙂

dave

[Anonymous]

I know it would be right thing to do, Dave. but take a look at my previous problems on this thread and this:

https://forums.autodesk.com/t5/autocad-forum/issue-with-creating-surface/m-p/7376270#M897478

I face simple problmes, like i cannot loft surface of petal , by creating splines. I cannot revolve arc to create a solid dome. I learned that Polararraying i No Bueno if I want to get 1 solid, not 11 solids.

Also, I extruded base of petals using edges of top surface. Base and surface ShOULD align...

[john.vellek · Accepted solution]

Hi @Anonymous,

I am sorry to see that you are still struggling with this drawing.  Is it possible to show me what your boss provided you with in the first place? Did your boss for instance give you some profiles or sections and a plan view with dimensions?

I am happy to work through this with you but knowing how you were asked to start and what the final expectation was would be most useful.

[Anonymous]

Hello, John Vellek

Here is what my boss provided me with.

[john.vellek]

Hi @Anonymous,

Thanks for the files. I can see how you are struggling with this issue as the drawing provided does not match the dimensions in the PDF and not all of the critical dimensions are included.

Let me see if I can dissect this a bit more and I will post my findings.

[john.vellek · Accepted solution]

Hi @Anonymous,

Here are the steps I used to create this object.

1. Units – set higher accuracy
2. Create a polygon with 10 sides Circumscribed around circle with radius of 62.5
3. Offset polygon inward a distance of 1.75 (original drawing measures 1.72044134)
4. Inscribe a circle within the new polygon
5. Offset the circle inward 19 (original measures 18.91137049)
6. Offset another circle from the outer one 16 (original measures 15.89474185)
7. Create an array of 20 lines that passes through the center of the body
8. Explode the array and then use the lines as construction lines to form the outline of the petal using radii of 4
9. Once the outline is developed, presspull it to a depth of 3
10. To get a smooth petal I used several arcs along the profile to loft. Make sure the petal length is accurate.
11. I loft all the arcs along the profile and use the outside edges as guides
12. I then create a region from the petal outline to form the bottom of the petal
13. Surfsculpt of all the petal surfaces and the bottom region gives me a 3D solid
14. Take the original polygon and presspull it to a depth of 5
15. For the dome, I create my center circle with a radius of 12.5
16. I draw a line from the center of this circle up 7
17. I then draw an arc connecting the two opposing quadrants of the circle and passing through the endpoint of my vertical line
18. I cut the arc in half and join it with the horizontal line that extends from the center to the endpoint of the arc
19. I join the horizontal line with the arc
20. I use revolve on this shape and select the endpoints of the vertical line as the axis
21. The result is a 3D solid
22. Lastly, I explode my array of petals
23. Now, everything can be assembled as a single piece using UNION

I have included my file for your use.

[Anonymous]

You deserve more kudos, than you can handle

[john.vellek]

Hi @Anonymous,

I hope all the pieces and parts help you get through the process. Let me know if you have additional questions on this issue.

[Anonymous]

It seemed to go very well. Thanks! Ill put this in "Solved" when my boss confirms it 😉

[parkr4st]

Nice fit on all the parts but it still an almost done project. 

look at the attached dwg.  that disc in the middle is a void in the piece.  the dome profile should extend down deep enough to include that.

That is a cylinder surround your piece with your piece subtracted and then flipped over to look at the cavity. 

we should be looking at a complete dome in the center.  add that cylinder and it is Done!

dave

[parkr4st]

look at the solid to lower right.  that is after adding the cylinder to the flower.  that is the final "Jell-O Mold" that will produce a solid like your flower when filled with Jell-O, or plastic or molten metal, etc.

dave