Translations:Assembly Basic Tutorial/26/en

To assemble things in the real world, one would use the parts structure to fit the counterpart into its place, for example a bolt which belongs into a hole. Or surfaces which touch each other and therefore define the parts exact position. In FreeCAD it works exactly like that: you use the parts geometry to specify where the second part belongs to. At your disposal are points, straight lines, planes and cylinders. The picture to the right shows them all in the FreeCAD environment. But of course, the geometry alone is not enough to calculate the parts positions, the kind of relation needs to be known too. For example two faces: They can touch each other, or just be parallel, maybe even perpendicular. This relation is set in FreeCAD through the already mentioned assembly constraints. You have 6 diffrent types at your hand: Fix, Distance, Orientation, Angle, Align and Coincident. Lets see what they all do and how to use them.