This is a project I used to further explore in-context modelling and top down design using a master sketch, carbon copies, fasteners workbench, and Assembly4 for the parametric rivets. The approach is a bit of a hybrid assembly which I would not recommend except for learning purposes. In this example, Assembly4 was conveniently used only for the rivets although all parts including ISO-standard fasteners could be included in the Model_Assembly with a bit more effort.
In this project, the model was created from dimensions scaled from photos of a commercial step ladder as shown in the following screen shot. All parts are in the same file, each of which were created from modified carbon copies of the top level master sketch. In this manner it is possible to articulate the moving parts of the model by changing one constraint defined in the master sketch. All of the moving parts follow the action of the master sketch.
I can place the 4.8 MB file on Dropbox for anyone interested. Please contact me via Private Message.
Zolko has recently added several improvements to the Assembly4 workbench that facilitate top down design including fasteners which I used in another project https://forum.freecadweb.org/viewtopic. ... 30#p349238
that was built from detail drawings. This workbench is evolving nicely, at least for my purposes. Kudos to the developer
OS: Windows 10 (10.0)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.18719 (Git)
Build type: Release
Python version: 3.6.7
Qt version: 5.12.1
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: English/United States (en_US)