(SOLVED) How can I assemble a valve train?

[chrisb]

How about the bounding box idea: https://forum.freecadweb.org/viewtopic. ... 20#p592111 ?

[thomas-neemann]

How about the bounding box idea: https://forum.freecadweb.org/viewtopic. ... 20#p592111 ?

thank you very much, that is the solution. You can also create tangents to splines in Sketcher. non-parametric, but better than nothing.

659.FCStd

(25.94 KiB) Downloaded 29 times

https://www.youtube.com/watch?v=IBeebpCTASc

phpBB [video]

[bambuko]

after many tries in assembly3 i gave up....

Perhaps a bit too quickly
With great help from Roy_043
on a matter of cam following
see: https://forum.freecadweb.org/viewtopic.php?f=44&t=68370
thank you!

Screenshot from 2022-04-30 09.01.40.png (113.13 KiB) Viewed 1090 times

I am working on .gif to show animation... but it will take me some time to make it attachable to the forum

Code: Select all

OS: elementary OS 6.1 JAlnir (Pantheon/pantheon)
Word size of FreeCAD: 64-bit
Version: 2022.407.26244 +4693 (Git) AppImage
Build type: Release
Branch: LinkDaily
Hash: 9610830a8fd492b3b3d96f8328507c80f1437cda
Python version: 3.9.12
Qt version: 5.12.9
Coin version: 4.0.1
OCC version: 7.5.3
Locale: English/United Kingdom (en_GB)

[thomas-neemann]

...
With great help from Roy_043
on a matter of cam following
...

thanks for the cooperation. Yes that looks good. it is shifted laterally

Bildschirmfoto_2022-04-30_10-08-47.png (42.07 KiB) Viewed 1084 times

Bildschirmfoto_2022-04-30_10-09-43.png (25.89 KiB) Viewed 1084 times

but that should be a small solvable problem

[bambuko]

Yes that looks good. it is shifted laterally...

optical illusion
viewed from another angle:

Screenshot from 2022-04-30 09.30.29.png (56.45 KiB) Viewed 1063 times

Screenshot from 2022-04-30 09.32.28.png (65.71 KiB) Viewed 1060 times

and we are still waiting for an animation

[bambuko]

and... a promised animation in Assembly3:

cam_anim.gif (989.85 KiB) Viewed 1050 times

To simply place statically in a correct place, is comparatively trivial exercise, which (as many have pointed out here) doesn't need assembly workbench.
What I like about assembly workbench is ability to animate

[thomas-neemann]

..
optical illusion ...

no, the installation position is offset

Bildschirmfoto_2022-04-30_10-57-09.png (37.74 KiB) Viewed 1046 times

...

I like your animation, freecad rocks

[bambuko]

..no, the installation position is offset

I like the animation, freecad rocks

I didn't realise that it was meant to be offset
(it wasn't clear from the file you have attached and I have assumed it was central)
That's trivial indeed and does not detract from the method used to assemble it

FreeCAD rocks indeed

[thomas-neemann]

this is probably the easiest and fastest method for assembling to a spline curve

tn2009-spline-nocke.FCStd

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https://www.youtube.com/watch?v=2J-jvrZY_sE

phpBB [video]