@edwilliams16 Can you describe a brief step by step on your drawing? I know for mesh you need a small opening to work.
I don't understand how sketcher is used, isn't that just 2d only?
If you could could you attach several drawings with the various steps?
I have used mesh to unroll a pipe mitered, and had to make cylinder degree 359 instead of 360.
Edit:
Also where and how is the cut. And also the usage of array?
Attachments
steps.png (63.53 KiB) Viewed 1090 times
Last edited by jfc4120 on Wed Jul 20, 2022 12:52 am, edited 1 time in total.
@johnwang yes I normally lay out a fitting as though I'm inside of it and I rotate myself counterclockwise. Just the way I was taught, that way on the metal you don't have a bunch of markings on the outside only on the inside.
jfc4120 wrote: ↑Wed Jul 20, 2022 1:24 am
@edwilliams16 I will go over this. How do you place the circle where needed, since it's a sketch.
The pipe I did I drew everything in draft mode.
Screen Shot 2022-07-19 at 4.01.52 PM.png (52.37 KiB) Viewed 996 times
You create Sketch001 (like Sketch) on the X-Y Plane, You then adjust its Placement.
Here the Sketch circle is tilted by 20 degrees about its x-Axis, then displaced by (5, 2, 35) ie 35 mm above the x-y Plane and displaced by (5, 2) mm in x-y plane. https://wiki.freecadweb.org/Placement is a fundamental concept in FreeCAD. It moves and orients objects.
Adjust the Placement of Sketch001 to place it above the Sketch, tilted and offset as desired.
Now we create four lofts from the corners of Sketch to the corresponding arcs of Sketch001 (no symmetry assumed)
We create Part Design SubshapeBinders for the respective vertices and edges and use Part|Loft with ruled surface checked between them
We create four more lofts between the vertices of Sketch001 and the corresponding edges of Sketch in the same way.
Part Boulean Union on the eight lofts.
Cut a thin (0.2 mm) slot along the desired seam by making a thin Part cube and doing a Boolean Cut.
Mesh Design|Mesh from Shape on Cut. Analyze and repair as required.
Mesh Design|Unwrap Mesh
The "and use Part|Loft with ruled surface checked between them", you do lofted and ruled? I will try, but don't see how. I thought it was one or the other.
EDIT:
I am trying a fourth first. I cannot get placement to work on a sketch, I tried placement 7 on z axis, it did nothing:
I don't know how to move a sketch if placement won't move it. I am re-reading about placement however.
Attachments
I even tried data tab, put it's blocked, not allowing typing.
Screenshot 2022-07-19 220841.png (7.86 KiB) Viewed 954 times
s1.png (28.92 KiB) Viewed 963 times
s2.png (13.44 KiB) Viewed 963 times
s3.png (44.12 KiB) Viewed 963 times
Last edited by jfc4120 on Wed Jul 20, 2022 3:12 am, edited 1 time in total.