Step 4.1: Sketch-Loops and Merged-Points

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Step 4.1: Sketch-Loops and Merged-Points


Key Terminology

Sketch-Loop: the derived name of a closed chain of sketch-elements.

Merged-Points: two Points are merged to become one Point.


This topic shows a video of example sketch-loops in the Part-Editor.

Sketch-elements are added, end-to-end, to form a single, continuous loop - see exceptions below.

The Points¥ at each end of each adjacent sketch-element are merged.

You do not need to add Constraints to any of the sketch-elements in a sketch-loop.

A sketch-loop is not an element. It is a derived element name.

We can add a Profile only to a sketch-loop, We can also add a Hole only to a sketch-loop.

¥ start-Point or end-Point of each sketch-element.

EXCEPTIONS - these are NOT Sketch-Loops:

three(3) or more(3+) Points cannot be merged to one Point – this is a Branch Point

sketch-elements cannot cross over each other - this is a Figure-of-Eight

sketch-elements cannot touch each other - this has Zero-Thickness

Example Sketch-Loops


1: A Circle

The simplest sketch-loop.

Used for a Cam-Follower Roller.

See Also: Cam-Follower


2: Lines

General polygon.


3: Lines and Arcs

General shape.


4: Arcs and Arcs

General free-form shape

Tutorial 4: Add Sketch-Loops