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Source: Autodesk Inventor
The idea that geometry within Autodesk Inventor behaves differently due to the application of constraints often hinders new users transitioning from a 2D drawing application.
Autodesk Inventor uses constraints in two primary ways:
- 2D and 3D sketch constraints control geometry within sketches
- Assembly constraints and joints establish relationships between components in an assembly that control position and behavior.
Within the Autodesk Inventor sketch environment, there are two types of constraints: geometric and dimensional.
The status bar at the bottom of the graphics window indicates the number of dimensions required to fully constrain a sketch. As you sketch, apply geometric or dimensional constraints to reduce this number to zero and fully constrain, or stabilize, your sketch geometry.
Geometric Constraints
Geometric constraints are created automatically between lines, arcs, and other geometry as you sketch. Constraints can also be manually applied after the sketch geometry exists to stabilize sketch shape or position. These geometric constraints allow the sketch to be edited with predictable results. For example, dragging the endpoint of a line that’s constrained to be perpendicular to another line does not change the perpendicularity.
Constraints are inferred when sketching new or modifying existing geometry. This process of inference decides which constraints are available to the geometry as the shape and orientation are varied. As a constraint is inferred, the constraint symbol is shown, as well as dotted alignment lines, if applicable.
Constraint persistence determines if inferred constraints are maintained after the geometry is created. If constraint persistence is turned off, constraints are not created automatically. Varying inference and persistence settings can affect the results of sketch operations.
In this tutorial we will learn how to use Constraints tools in a 2D Sketch using Autodesk Inventor.

Autodesk Inventor – Move & Rotate
When you constrain or join assembly components to one another, you control their position. To move or rotate a component, either temporarily or permanently, use one of the following methods:

Autodesk Inventor – Scale Assembly
One of the new features in Inventor is the ability to scale your models. You might be wondering, why didn’t Inventor have this ability prior to the release?
Related Articles
Autodesk Inventor – Import points from Excel
You can import points from a Microsoft® Excel spreadsheet into a 2D sketch, 3D sketch, or drawing sketch. You can use the points to represent items such as inspection points, locations for spot welds, and points on a spline.
Autodesk Inventor – Scale
One of the new features in Inventor is the ability to scale your models. You might be wondering, why didn’t Inventor have this ability prior to the release?
Autodesk Inventor – Revolve
There are two ways to created revolved features: from a sketch profile or from a primitive. The primitive shape creation commands create full revolutions only.
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