Create a new Body : creates a PartDesign::Body container in the selected App::Part.Create a new Model : creates a new App::Part in the current active document and populates its tree with necessary items to make it ready for Assembly4.The Assembly 4 toolbar has following buttons: The document is then ready to be used, as a part or as an assembly. click on the "create Model" button: this creates an App::Part container with all the needed elements.So the surest way to use this workbench is to have files created, saved, closed, and re-opened: this way, the App::Link always sees the files you need. Unfortunately, it seems that when creating a new part and saving it, the App::Link doesn't "see" the file's path. It also needs to be saved to disk, because the App::Link framework needs the file's path. In order to insert a part in Assembly 4 (and App::Link in general), it needs to be open in FreeCAD. You can use the provided example assemblies to experiment with this workbench's features.
#Assembly 4 cad windows#
#Assembly 4 cad manual#
Manual install: you can download the Assembly 4 workbench as a ZIP archive here: it must be extracted somewhere, and the Mod_Asm4 subdirectory must be moved to the regular FreeCAD/Mod directory, where all other workbenches reside: Pre-built binaries for this development branch can be downloaded here.Īddon Manager: The preferred method for installing the Assembly 4 workbench is through the Addons Manager (menu > Tools > Addons Manager). Please bear in mind that Assembly 4 is not compatible with the stable FreeCAD v0.18, it needs the App::Link frame-work originally developed by realthunder and merged into FreeCAD v0.19. This feature can prove to be extremely powerful once a user gets used to it.
Under the hood, for those interested in the technical details, the ExpressionEngine of the Placement property of the App::Link is used to superimpose the Placement of two coordinate systems - one in the assembly and one in the inserted part - which fixes all degrees of freedom of the inserted part.Īnother particularity of Assembly 4 is that there is no difference between a part and an assembly: it's possible to mix datum objects, 2D sketches, 3D geometries and inserted parts at will. There can be many coordinate systems in each, and the user can choose which of these coordinate systems - in the assembly and in the part - shall be used. The particularity of Assembly 4 is that the placement of the inserted (linked) part is done by matching corresponding coordinate systems in the parent assembly and in the linked part: therefore, there must be at least 1 coordinate system in the assembly and at least 1 in the part. In other words, this is identical what other CAD systems do when speaking of assembly. This allows to create many instances of the same object without any overhead, allowing the creation of large assemblies. The advantage of App::Link feature is that it's possible to link FreeCAD objects between files, seamlessly: a model in a file will appear in the tree of another model in another file, but the data is not copied across. The basic principle is the one from assembly without solver: FreeCAD's App::Part container serve as basic building blocs, that are inserted into each other using the App::Link interface introduced with FreeCAD 0.19. This thread starter will be updated if new versions of the workbench appear. After a lot of brainstorming in the assembly without solver thread, and also some on the Assembl圓 preview and New Assembly 4? threads, a new assembly workbench for FreeCAD has emerged, called sequentially in the list Assembly #4.
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