Incremental rotation of parts

[Vagulus]

I am making a flexible drive coupling. There are two yokes which must interlock.

230223 Misaligned Flexible Coupling Yokes.png (30.46 KiB) Viewed 1400 times

When I insert the second yoke it is about 22.5° out of mesh. I cannot rotate it except in increments of 90° - that is to say, "I have not yet found a way to rotate a part except in increments of 90°."
There must be a way.
Would someone please enlighten me? Thanks

[bambuko]

Have you thought/tried typing over the default 90deg, to replace it with the desired angle?

PS it might help if you mention which assembly workbench you are using?

[Vagulus]

Sorry about that

Code: Select all

OS: Windows 10 Version 2009
Word size of FreeCAD: 64-bit
Version: 0.20.1.29410 (Git)
Build type: Release
Branch: releases/FreeCAD-0-20
Hash: f5d13554ecc7a456fb6e970568ae5c74ba727563
Python 3.8.10, Qt 5.15.2, Coin 4.0.1, Vtk 8.2.0, OCC 7.6.3
Locale: English/New Zealand (en_NZ)
Installed mods: 
  * Assembly4 0.12.2
  * BOLTSFC
  * Curves 0.5.1
  * dodo
  * fasteners 0.3.46
  * parts_library

Using Assembly 4.

You can't overtype the Rotate Buttons.

[ppemawm]

"I have not yet found a way to rotate a part except in increments of 90°."
There must be a way.

Select the Part or Body Link in Model. Use the Assembly > Attachment Offset in the Property View. Define the Axis and Angle.

You may have to expand the Ellipsis in the Attachment Offset field to get the correct axis in the Placement panel. Use Apply Incremental Changes as first step. Then define axis and angle. It is not so intuitive but with some experimentation you will likely get the hang of it.

Note that there is an Assembly4 0.12.4 update.

[Vagulus]

There is an 0.12.5 update!

Code: Select all

OS: Windows 10 Version 2009
Word size of FreeCAD: 64-bit
Version: 0.20.1.29410 (Git)
Build type: Release
Branch: releases/FreeCAD-0-20
Hash: f5d13554ecc7a456fb6e970568ae5c74ba727563
Python 3.8.10, Qt 5.15.2, Coin 4.0.1, Vtk 8.2.0, OCC 7.6.3
Locale: English/New Zealand (en_NZ)
Installed mods: 
  * Assembly4 0.12.5
  * BOLTSFC
  * Curves 0.5.1
  * dodo
  * fasteners 0.3.46
  * parts_library

However, you've got me.

230224 Rotating Part 640.510.png (109.02 KiB) Viewed 1204 times

As far as I can fiigure out (I could find nothing in the Assembly4 Documentation) you can only set one angle. Even then, I can't figure out how you apply that angle of rotation to a specific axis - nothing I cahnge changes anything. I am completely mystifies as to how I would rotate the Bossed yoke 180° on the Z-axis and 15° on the X-axis.

I will greatly appreciate any help here.

[Zolko]

When I insert the second yoke it is about 22.5° out of mesh. I cannot rotate it except in increments of 90° - that is to say, "I have not yet found a way to rotate a part except in increments of 90°."
There must be a way.
Would someone please enlighten me? Thanks

create an intermediate LCS that you attach to the 1st part, rotate that intermediate LCS by the amount you need, and attach the second part to that intermediate LCS

[Vagulus]

Ahh! Rotate it on insertion.
Thanks

[ppemawm]

There is an 0.12.5 update!

Thanks for the heads up.

As in all things FreeCAD there is more than one way to do things. You can also rotate the original sketch. Or, rotate the body LCS. Or,...etc.

As far as I can fiigure out (I could find nothing in the Assembly4 Documentation) you can only set one angle.

You may have to expand the Ellipsis in the Attachment Offset field to get the correct axis in the Placement panel. Use Apply Incremental Changes as first step. Then define axis and angle. It is not so intuitive but with some experimentation you will likely get the hang of it.

Please see attached file and try experimenting.

Picture3.png (654.02 KiB) Viewed 1094 times

Assembly4_Placement.FCStd

(47.22 KiB) Downloaded 36 times

See also https://wiki.freecad.org/Placement

Code: Select all

OS: Windows 10 Version 2009
Word size of FreeCAD: 64-bit
Version: 0.21.0.31850 (Git)
Build type: Release
Branch: master
Hash: d8d3bb8120ad139cf1eb2acf0be0ae6c297ac7f3
Python 3.10.9, Qt 5.15.6, Coin 4.0.0, Vtk 9.1.0, OCC 7.6.3
Locale: English/United States (en_US)
Installed mods: 
  * Assembly4 0.12.4
  * fasteners 0.4.15
  * freecad.gears 1.0.0
  * QuickMeasure 2022.10.28
  * Render 2022.2.0

[Vagulus]

Thanks for that. Lots of things I didn't know existed.