Fully Defining a Sketch | SOLIDWORKS BEGINNER | Chapter 01: Lesson 13 | CSWA COURSE

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In SolidWorks the status of a sketch depends on the geometric relations between geometry and the dimensions that define it.
The three most common sketch states are; under defined, fully defined, and over defined. This status is shown in the status bar at the bottom of the SolidWorks interface.
A sketch has a status of under defined when its sketch entities do not have sufficient relations and dimensions that constrain the sketch geometry entirely.
A sketch has the status of fully defined when all of the sketch entities are fully constrained by using relations and dimensions.
A sketch is over defined when sketch entities have multiple relations or dimensions controlling the same aspect of that sketch entity, which will cause conflicts in the geometry. Give example.
Fully defining a sketch is best practice in SolidWorks, which allows features to be created without geometry issues or rebuild errors. In this lesson I will use this under defined sketch as an example, and add relations and dimensions to make it a fully defined sketch.
This video is Chapter 01: Lesson 13 of my CSWA (Certified SolidWorks Associate) course which is completely FREE on RUclips. I only ask in return is that if you please like the video and subscribe to the channel to show your support.
TOPICS COVERED
• Understand the the different statuses of a sketch
• Identify which parts of the sketch are lacking constraints
• Add sketch relations and dimensions to fully define a sketch
• Understand why a sketch should be fully defined

[@experimental_av]

This took me a while to find out but you will never get to fully defined unless you start drawing at the origin point (right word?) or anchor down some point.

[@DraftID]

You are correct. Starting from the origin point means that there is an automatic relation to that point so therefore the sketch is locked down.
Another example is draw a square away from the origin but the dimension the closest point of the square to the origin. The dimensions will tie it back to the origin point.
Another example of this is creating a revolved feature you might not have it drawn from the origin point but you would dimension back to it.

[@luckylusterio4388]

This is the question i ask reddit once which you answered thank you for featuring it. However, the question is how are you gonna identify the relations of a sketch if the given units is only composed of dimensions? because in actual field we cant really put in sketch relations in a drawing we just put dimensions in the plans that we made ourselves or some of our co worker.

[@DraftID]

It's been a while since I have worked consistently with technical drawings but I don't think I have ever seen one that actually shows relations. So in general things like tangent relations would be implied.