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IronCAD positioning constraints are a great tool for users to position their parts with just a few clicks. These constraints are easy to use and can accurately model how your parts would work with one another in the real world. Fix one of the parts in parent and select the mechanism mode tool. This tool allows you to move the parts by dragging them with your mouse and works with positioning constraints to ensure that your creation has the correct tolerances, and fit. The Mate and Align tool in the positioning constraints are useful to match surfaces to each other. The behavior for the direction of the contents of the surfaces the parts are attached to is reversed for these tools. The coincident and concentric constraint use points to line up round surfaces and points to ensure that they are always touching one another. The following videos show off the Mate, Align, Coincident and Concentric Constraints: mateandcoincentric.mp4 Coincidentandalign.mp4 The parallel and perpendicular command allows users to ensure that their edges can either perpendicular or parallel to other edges on another part. Parallel.mp4 Tangent creates a tangent constraint that ensures that the round surface is always tangent to the selected surface. Tangent.mp4 Distance creates a constraint that keeps a feature a set distance from the other selected feature, while the angle command ensures that an angle is maintained. Distance.mp4 AngleConstraints.mp4 The follower/Cam constraint changes the behavior similar to that of a camshaft. Take a look at the Video example below: Cam.mp4 The Pin and slot constraint follow the path of the slot while allowing the pin to rotate freely. take a look at the video below: pinandslot_mp_mp4.mp4