<< Click to Display Table of Contents >> Navigation: Getting Started Tutorials - MechDesigner > Tutorial 4: From Sketch-Elements to Extrusions > Step 4.1: Sketch-Loops and Merged-Points |
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Definition |
Sketch-Loop : |
the derived name for a closed chain of sketch-elements |
Merged-Points : |
a Point* from two sketch-elements are merged to one Point |
* start-Point or end-Point of the sketch-elements |
To review example sketch-loops - see exceptions below. Optionally, add Constraints to the sketch-elements. Constraints are not required, but it is good practice. |
A sketch fails to be a sketch-loop if: •three(3) or more(+3) Points cannot be merged to one Point – this is a Branch Point •sketch-elements cross over each other - this is a Figure-of-Eight •sketch-elements touch each other (other than their merged-Points) - this is Zero-Thickness |
1: A Circle The simplest sketch-loop. There one Circle Frequently used for a Follower-Roller. See Also: Follower Shapes |
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2: Lines General polygon. There are five Lines and five Points. Why: The Point (end-Point or start-Point) of one Line is merged to the Point (start-Point or end-Point) of the adjacent Line. If you add five Lines, but do not Merge-Points, there is a total of 10 Points. |
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3: Lines and Arcs General shape. As above, but there are 3 Lines and 1 Arc. |
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4: Arcs General shape. As above, but there are three Arcs. |
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Tutorial 4: Add Sketch-Loops
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