No sketch projection, but sketch wrap (tongue drum)

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Gatze
Posts: 10
Joined: Thu May 25, 2017 5:54 am

No sketch projection, but sketch wrap (tongue drum)

Post by Gatze »

Look picture:
tongdrumexample.png
tongdrumexample.png (209.09 KiB) Viewed 998 times
I can draw the base, it's hollow, the thickness command is a bit unpredictable, so I cloned the body, scaled it and subracted it.

Now I'm experimentating with the 'Sketch on Surface' in the curved workbench, but I don't really know whats going on. You have a very little rectangle to draw in.

The shapes should not be projected, but 'shrink' wrapped, 'projection' on surface in the part workbench I can't use. The sketch should be on top and then wrapped down on to the shape. I need it this way, because the length of the shapes are important for the the tone height so they should be consistend. Appreciate any help.
examplefreecad1.png
examplefreecad1.png (227.77 KiB) Viewed 998 times
examplefreecad2.png
examplefreecad2.png (349.71 KiB) Viewed 998 times
examplefreecad3.png
examplefreecad3.png (221.46 KiB) Viewed 998 times
Last edited by Gatze on Tue Mar 28, 2023 9:58 am, edited 1 time in total.
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Willem
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Re: Would this be possible to design with Freecad (tongue drum)

Post by Willem »

I did not make your exact design but I think this is the method you want to use
Attachments
tongdrum.FCStd
(558.89 KiB) Downloaded 20 times
Gatze
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Joined: Thu May 25, 2017 5:54 am

Re: Would this be possible to design with Freecad (tongue drum)

Post by Gatze »

Thanks you, I will try the pocket function.
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jimb
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Re: Would this be possible to design with Freecad (tongue drum)

Post by jimb »

Now I'm experimentating with the 'Sketch on Surface' in the curved workbench, but I don't really know whats going on. You have a very little rectangle to draw in.
I just ran into a video tutorial on sketching on a surface which should help explaining that rectangle you see.
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papyblaise
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Re: Would this be possible to design with Freecad (tongue drum)

Post by papyblaise »

mine sugest

Edit same as Willem sorry
Attachments
drum PPB.JPG
drum PPB.JPG (47.12 KiB) Viewed 824 times
tongdrum.FCStd
(1007.12 KiB) Downloaded 10 times
Gatze
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Joined: Thu May 25, 2017 5:54 am

Re: Would this be possible to design with Freecad (tongue drum)

Post by Gatze »

Thank you all, I will have a look in all this.
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hammax
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Re: Would this be possible to design with Freecad (tongue drum)

Post by hammax »

... using SketchOnSurface in CurvesWB and Array in Sketcher to produce this pattern.
You can scale the Mapped_Sketch rectangle !!
https://en.wikipedia.org/wiki/Steel_tongue_drum

TongDrum.PNG
TongDrum.PNG (32.01 KiB) Viewed 649 times
Attachments
tongdrum_4.FCStd
FC.20.1
(89.76 KiB) Downloaded 12 times
tongdrum_3.FCStd
FC.20.1
(28.82 KiB) Downloaded 11 times
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hammax
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Re: Would this be possible to design with Freecad (tongue drum)

Post by hammax »

... a variation for generating tongdrum membranes by using the Link tool and scaling -
still not perfect but a possible hint:

TongDrum_2.PNG
TongDrum_2.PNG (61.42 KiB) Viewed 560 times
Attachments
tongdrum_6.FCStd
FC.20.1
(201.3 KiB) Downloaded 12 times
tongdrum_5.FCStd
FC.20.1
(121.24 KiB) Downloaded 12 times
Gatze
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Joined: Thu May 25, 2017 5:54 am

Re: Would this be possible to design with Freecad (tongue drum)

Post by Gatze »

This looks als very good, today I have some time to try the different approaches.
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papyblaise
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Re: Would this be possible to design with Freecad (tongue drum)

Post by papyblaise »

you should change the title in relation to the project so that others have an easier time doing future research
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