Fusion 360 Constraints and Dimensions
This Fusion 360 tutorial explains the crucial process of fully defining a 2D sketch using geometric constraints and dimensions [00:01]. The instructor emphasizes drawing the shape first without dimensions and then applying constraints like horizontal/vertical, coincident, tangent, and equal to control the geometry's movement [01:36]. It then covers using the Sketch Dimension tool to set specific sizes, demonstrating the difference between aligned, vertical, and horizontal dimensioning [14:44]. The video also gives guidance on how to decide which constraints and dimensions are most important for a design and how to check the status of the sketch using the line color (blue for unconstrained, black for constrained) [04:13].
Video Chapters
[00:01] Why the initial view/orientation matters when creating a sketch
[00:51] Understanding Horizontal and Vertical geometric constraints
[01:36] Why you should never add dimensions while drawing
[02:38] Overview of the Geometric Constraints toolbar
[03:07] Coincident constraint: merging points or making a point line up with a line
[03:36] Vertical/Horizontal constraint between two points
[04:13] Checking the sketch status: Blue line for unconstrained, black line for constrained
[05:54] How to check the Area of a profile or the Length of a line in the status bar
[06:58] Equal constraint (making two elements the same size)
[07:46] How to decide whether to use an Angle or a Distance dimension
[08:34] Other useful constraints: Parallel, Perpendicular, Midpoint, and Colinear
[10:11] The rule for sketch complexity: Keep sketches less than eight lines
[12:26] The Fix constraint and when to use it (or not)
[14:44] How the Sketch Dimension tool works (aligned, horizontal, and vertical dimensions)