Creating Parametric Cross Sections in FreeCAD using a spreadsheet
ฝัง
- เผยแพร่เมื่อ 20 ต.ค. 2023
- We learn how to create, place and export a series of cross sections in the form of a parametric wall art wave in FreeCAD. We will have full control over the number of cross sections and configuration of the model via a spreadsheet. This creates a compound object that we can have additional control over.
Spread across 3 self contain videos that are designed either to be used together as a single project or individually as separate workflows. For example the project can be created all the way through to the export of individual sections. Or can be used individually to learn how to create cross sections and use parametric spreadsheets (for such things as boat and model air craft wing making), how to place cross sections flat ready for export for laser cut / CNC and how to use the provided macro allowing you to export multiple selected parts of your project to individual files in one go.
There is a playlist which I have added these video to which contains all the episodes in the series.
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Nice, got my Saturday morning coffee and a MJS freecad video to watch while sipping.
Excellent, the FC Wiki is getting bigger every video of yours is release| A huge thanks Darren
Great to hear! Glad that I can contribute 😊😊😊👍👍
Brilliant!
Thank you
Super nice explanation. Makes FC fun to use knowing that your videos are standing by to help us out.
Thank you, glad you enjoyed. So much to share and really enjoy the application from others like yourself.
Great video this is will help me in designing a dash panel. I have learnt a fair bit by watching your videos.
Great to hear!, and thanks for sharing what you are going to use it for. Always helps others get a idea of the application for such workflows.
This is such a great video! You are showing everyone how powerful #FreeCAD is. Thank you! :)
Only wow. Thank you 🙂
Love this one! Thanks again.
My pleasure!
Very cool video as always!
Thanks again! 😁😁😊😀😊👍
Nice approach, given me some ideas to slice up some terrain created from xyz point files. Finding the part workbench cross section tool a bit unreliable with complex surfaces.
That's a great idea! Always enjoy when the community feedback worth what they are going to use it for.... Gives me a few ideas as well 😁😁😏😁😏😏
Hi MJS, Thanks for the great videos your putting out! Do you know of any TH-camrs in the freecad community that do FEA ?
What version of Freecad are you using? When I try @4:57 it just starts moving the point along the line. Maybe Freecad on OSX just doesn't work properly. I've had numerous issues with it whereas the linux version just seems to work properly (and presumably Windows too). Also under linux, after adding all the b-spline points I get a weird shape, not a single line.
I think I may know what's happened. I think you are using a b spline rather than a polyline. Easily done but two totally different tools. Give the polyline a go and see how you get on.
Thanks for another excellent video. I think this has tremendous potential and I have been working with this model and really like the parametric option of being able to modify the location of all the points. It would be interesting to see if this could be used to model a parabolic dish. I am going to see what I can come up with since there are so many potential uses of this. Thanks.
Thanks 😊 Interesting idea, I love to see what everyone users these videos for, keep me posted love to see what you come up with. Interested in parabolic dish for solar heating and solar grills. Next year want to get out and try some experiments so yes, let me know how you get on.
Hi, would it be possible to get the playlist name with all 3 videos in this series or the name of them? Thanks
Thank for the comment, there is a playlist but it was still set to unlisted! Without your comment I would of totally missed that. Have updated now. The link to the playlist is th-cam.com/play/PLWuyJLVUNtc1HhIVwnU-pJXxMepa1tF9h.html Thanks once again.
I've been thinking about how to do this on FreeCAD for a long time. Seeing how the resulting bspline line does not connect to the heights you are setting in the spreadsheet, if you select "B-Spline By Knots" or "Periodic B-spline By Knots" , the constrained points remain on the b-spline resulting line. You could also put up a ton more points for this if you are fabricating with known 3d curve formula, since you'd be able to generate the point constraints as a function of position relative to origin and the 3d curve equation.
This tutorial just freed up creativity constraints in a bunch of projects I am planning for wood art around the house and an acoustic horn design that uses very particular geometry! Donation going your way!
On a question related to this, is it possible to use a 3D STL file surface as the cutting edge of the array of cross sections? Like if I had a STL file of a face, and I want to use the STL to be the outside or inside edge of the cross sections.
I am not sure if I have answered this one twice or a very similar comment so apologies in advance if I have. Great idea about the other b splines. Looks like the creative juices are churning on this one for you 😀 interesting regarding the formula!. For the stl you can convert it to a shape in the mesh workbench. Or you can use the mesh cross section tool to get slices and use that. These slices can be exploded in the part workbench.
Nivce but i dont see a real time control when you enter the numbers.