FreeCAD: How Do You Create This Surface? Creating and Surfacing Wire-frames Using Curves Workbench

Creating Nurb curved surfaces with the Curves workbench in FreeCAD. We look creating wireframes of surfaces using a combination of sketcher and the draft workbench to manipulate curves into position. We will then learn how to surface the wire frame by surfacing a network of curves using the gordon surface tool.
Originally from a question by a patreon who is modelling a telephone box but help was needed to find a way to tackle the top roof.
#FreeCAD , #CAD , #3DPrinting
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[@BenzTNT]

Brilliant. Something I’ve never used as not known how to so simply explained. Do some more videos of things like this😊

[@MangoJellySolutions]

Thanks, I certainly will do! Curves and Nurbs surfaces are a whole area that I can dedicate numerous videos to.

[@fooballers7883]

A nice one again.... old enough to remember these phone boxes...If I recall it had a dome roof internally ... Thank you.

[@MangoJellySolutions]

Yep same here 😊, they have been repurposed for book swapping in our local village like a small library. 😊

[@stewartpalmer2456]

Brilliant. Thank you.

[@MangoJellySolutions]

You're very welcome!

[@sjn8099]

Only great. Thank you 🙂

[@jpwillm5252]

Since I'm not familiar with Gordon's surfaces, I watched this demo with interest. 8-) Personally @ 5:50, I propose to offset the JoinCurve by 50 mm in Y and to make it a polar array with four occurrences.

[@MangoJellySolutions]

Nice tip there will the polar array. Very good idea.

[@SatyajitRoy2048]

You're truly masterpiece!

[@MangoJellySolutions]

Thank you 😊😊

[@TheScotsalan]

As I watched, I was thinking, what if someone gave me this model, without ever having seen it, and asked me to change one of the first sketch curves. On solidworks, I would just roll back the design tree to see how its constructed. With Freecad, is it the same ? I know its a daft question you have prob answered before, so yup, I will go back to the start of your vids 😂. I have had a break from Freecad cos I have been doing a TITAN sub design challange the past few weeks, and I dont have a clue how to do FE on Freecad yet. I fired up freecad again today, and it feels like I am back to square one 😂. Daft comment of course... for the ALGO. 👍

[@eggie3797]

Legend

[@MangoJellySolutions]

Thank you 😁😁😁👍

[@johnanderson4638]

Interesting... however for this to be any use in making a phone box it should be realised by parts each of which ia made separately; then pull the whole thing together with assemblies.

[@TheScotsalan]

Unless its for 3d printing for a model railway 👍.

[@user-eq5hu6yj2n]

Дякую цікаво

[@garyweliver1870]

I would create the roof about like we did on creating a spoon? I haven't watched this yet. I am learning so much more than I have to date just hacking around on my own!

[@MangoJellySolutions]

Yes that could be another way to create it, there are a number of workflows and it's great to see you have identified other subjects to use for it. Glad your enjoying the videos

[@jjfoerch]

FreeCAD has so many data types, from points, sketches, wires, various types of curves, surfaces, solids, bodies - do you have something like an overview, when to use which, and which ones can be converted to which other ones? Thank you for the great videos.

[@SpaceMarshalGyorni]

Don't try to learn all at once, it won't work. I suggest you just take a basic tutorial and simply follow along. Follow exactly at first, then start deviating and make something similar on your own. Then, whenever you don't know how to continue, pick a tutorial for a part that has a similar feature, and take it from there. Learning "the software" first won't work, because there's too many different workflows and tools depending on what you're trying to achieve, and even a myriad different ways and workflows to achieve the exact same thing. The best way to learn a software like this is project-based learning, where you pick a defined goal and learn the tools you need as you go, bit by bit.

[@Miniellipse]

Good point. I wouldn’t have known that I needed that Facebinder. I would have tried to extrude from the bottom face of the dome directly. Would that have worked?

[@sgriska]

I am wondering how you would approach creating a similar shape (a dome arising from a polygon) with more than four sides? Specifically, I’m trying to figure out how to create a smooth half-ellipsoid dome rising out of an 18-sided polygon. I have tried setting up a loop of curved ribs from the corners with extent polygons offset vertically touching them and tried to run Gordon Surfaces but it just hangs and gives me an error. I have tried subdividing it and using arrays but the seams aren’t smooth - they pucker slightly inward.

[@cgln8760]

I'm following the steps exactly, but when I try and add the symmetry constraint to the end points along the x axis, the constraint marker is off centre and the whole arc turns orange. Any idea what that means,? Thanks in advance.

[@imacmill]

Perhaps I'm missing something here, but I was able to build the 'roof' in about 2 minutes. I simply created a profile suitable for revolving the dome part of the roof, then made a pocket from an open-ended box profile (a square within a square) whose inner square corners are 'on' the outermost outline of the dome. Two trivial sketches, done. Disregard: there's more to it.

[@electronicscaos]

I thought the same procedure, and it doesn't even need any additional workbench. But the gold in this video is exactly that: a different way to skin a cat.

[@darryllcrook376]

Using Part WB, put a smaller sphere inside a bigger sphere and cut the smaller from the larger. Surround the resulting cut (a hollow sphere) with a huge cube with a square pocket removed from it (cut into it) and cut the hollow sphere with the pocketed cube.

[@AdredenGaming]

hmm couldn't make the facebinder extrude :( Then it crashed as I was trying to fix that.. Cool video though. it was nice seeing how much one can jump between work benches

[@mshaynerushton]

now How do you set this to a path in FreeCAD 0.21.1?

[@JernD]

I was inspired by your video to make something very similar in build123d (a new type of CodeCAD that uses the same underlying kernel as FreeCAD (OCCT))! Here is my solution: from build123d import * with BuildLine(Plane.XZ) as l: m1 = JernArc((0,0),(1,0),100,-45) mirror(about=Plane.YZ) with BuildLine() as l2: with PolarLocations(0,4): with Locations((0,(m1@1).X)): add(l.line) zz = Face.make_surface(l2.line.edges(),surface_points=[(0,0,-(m1@1).Z)]) bb=zz.thicken(-10) with BuildPart() as p: add(bb) with BuildSketch(Plane.XY.offset(-80)) as s: Rectangle(141,141) extrude(until=Until.NEXT) with BuildSketch(p.part.faces().sort_by(Axis.Z)[0]) as s: Rectangle(161,161) extrude(amount=-20)

[@SKpetter]

Aha! Hmm... so, we will also draw Dr. Who? 😛

[@GSimpsonOAM]

Is there a toolbox to make the inside bigger than the outside?

[@jpwillm5252]

@@GSimpsonOAM Maybe Part/Offset

[@MangoJellySolutions]

Lol 😂😂😂😂