Inventor Constraints

Front 1

Coincident

Back 1

A geometric constraint that constrains two points together or constrains one point to a curve. When this constraint is applied to the center points of two circles, arcs, or ellipses, the result is the same as the concentric constraint

Front 2

Collinear

Back 2

A geometric constraint that causes two or more line segments or ellipse axes to lie along the same line. In an assembly, a collinear constraint is achieved with a mate constraint between two lines, edges, or axes

Front 3

Concentric

Back 3

A geometric constraint that causes two circles, arcs, or ellipses to have the same center point. The result is the same as that of a coincident constraint applied to the centers of the curves.

Front 4

Fix

Back 4

Causes points and curves to be placed in a stable position relative to the sketch coordinate system. If the sketch coordinate system moves or rotates, fixed curves or points move or rotate with it.

Front 5

Perpendicular

Back 5

Causes selected linear geometry to lie at right angles to each other. Linear geometry includes lines, ellipse axes, spline handles, text edges, and imported images

Front 6

Tangent

Back 6

Causes curves, including ends of a spline, to be tangent to other curves. One curve can be tangent to another even if they do not physically share a point.

Front 7

Horizontal

Back 7

Causes selected linear geometry or pairs of points to lie parallel to the X axis of the sketch coordinate system. In addition to lines and pairs of points, this includes ellipse axes, spline handles, text edges, and imported images.

Front 8

Parallel

Back 8

Causes selected linear geometry to lie parallel to each other. In addition to lines, this includes ellipse axes, spline handles, text edges, and imported images. In a 3D sketch, the parallel constraint is parallel to X, Y, or Z part axes unless you manually constrain to selected geometry.

Front 9

Equal

Back 9

Causes selected arcs and circles to resize to the same radius or selected lines to resize to the same length

Front 10

Vertical

Back 10

Causes selected linear geometry or pairs of points to lie parallel to the Y axis of the coordinate system. In addition to lines or pairs of points, this includes ellipse axes, spline handles, text edges, and imported images.

Front 11

Smooth

Back 11

Causes a continuous curvature between a spline and another line, arc, or spline.

Front 12

Symmetric

Back 12

Causes selected lines or curves to become proportionally constrained around a selected line. Segments constrained to the selected geometry also reorient when the constraint is applied.

Front 13

Reference

Back 13

Indicates an associative relationship between projected geometry and the geometry from which it was projected.

Front 14

Pattern

Back 14

Indicates sketch geometry that is associated with Rectangular Pattern or Circular Pattern.