placement with angular offset other than 90°

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mech_eng92
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Joined: Mon Nov 14, 2022 5:53 pm

placement with angular offset other than 90°

Post by mech_eng92 »

Hi everybody,

I'm modeling the crankshafts and moving parts of a steam engine. Lately I ran into a problem when assembling the excenter of the steam engine, which sets the timing for the engine.

The problem is, that I can't figure out, how to position a part with an angular offset other than 90°(and multiples) to the LCS I refer to (see picture ).
Rotation other than 90°.PNG
Rotation other than 90°.PNG (125.96 KiB) Viewed 785 times
Of course one way would be to remodel the part in a way, that the angular offset can be set correctly by those 90° increments. But I'm half convinced and half hoping that the functionality is available and I just don't know how/ where to access it.

(I need an offset of 132,85°)

I need to be able to connect the new part to the shown LCS and when I do a simulation with changing angle of the crankshaft the part must follow of course.

When I first place the part via the shown functionality with 90° offset I can't change it afterwards. The part always jumps back into previously set orientation.

Can somebody help me out? Thanks in advance.
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onekk
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Re: placement with angular offset other than 90°

Post by onekk »

Please add you full version info as explained in:

https://forum.freecadweb.org/viewtopic.php?f=3&t=2264


This should give even the Assembly WB version.

Are you using Assembly4, as in FreeCAD there are some that could be used at least three are actually in development.

A file should be interesting, or better a Minimal Working Example (MWE for short) that permit to an helper to modify it and maybe repost.

MWE means a file that contains only relevant parts and "operations" so an helpers is not forced to find a part in a myriad of other objects.

This is in the philosophy of "Help us to help you", if you make an helper work too hard, maybe he is not very willing to help, as here no one is payed to supply help, we are all users here.

Regards

Carlo D.
GitHub page: https://github.com/onekk/freecad-doc.
- In deep articles on FreeCAD.
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ppemawm
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Re: placement with angular offset other than 90°

Post by ppemawm »

mech_eng92 wrote: Sat Dec 03, 2022 3:11 pm how to position a part with an angular offset other than 90°
The link's Attachment Offset property is intended for this purpose (Assembly4).
"It is a poor workman who blames his tools..." ;)
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