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Not fully defined sketch
rod_puckey
Member Posts: 9 ✭
0
Answers
I have a sketch, drawn only in one view.
Every single intersection is dimensioned from both axes.
All radii are dimensioned from the point of origin.
All points of origin are dimensioned from both axes.
I cannot see anything else that could be dimensioned.
If I rotate the drawing it is in 2D.
It still shows up as Sketch Not fully defined.
Do I have to define the positions of all of the above in the 3rd axis before it will show as fully defined?
Is it just another occasion where I have to start again?
sharing the document would be helpful, without we can only guess…
As a diagnostic tool for sketches, Open the sketch, then try clicking on lines and points, and try to drag them around slightly. Watch for unexpected movement - this process can take a while, depending on the complexity of your sketch. Most of the time I find it's a point that is not constrained (and they are almost invisible). The advice by rafael_telgmann is all good, especially about overlapping lines and their corresponding end points (that may be floating in space). Don't forget to dimension (or constrain) to the origin. This is one step that some forget.
The question about the 3rd axis, the answer would be no, you don't need to define the "Z" - the sketch plane is "2d" and defines the "Z" distance on this plane.
Hope that makes sense. Good luck.
I find that if I create a new drawing.
Sketch
Select a drawing pane then draw:
a line from the origin across the X axis with a defined length,
a parallel line for the same length,
draw lines between the ends
defined the distance between the parallel lines
version the drawing.
This shows up as not fully defined.
Not quite sure what else to do from here.
Even a single line from the origin across an axis for a defined length
click tick to approve.
Still shows as not fully defined
I have the same issue… create a sketch. Draw a random rectangle. "Sketch is not fully defined"
@joao_drummond
You just need to anchor any floating geometry to the origin. The origin is the one and only thing that is fixed in space when you start a new sketch, and if your geometry isn't defined to the origin somehow, (dimensions, constraints, or a combination of the two) it will always be blue (under-defined). This is expected behavior and you will soon learn to just add a couple of dimensions or constraints.
@rod_puckey -
While reading this post, the only thing that comes to mind is whether or not you have inferred a horizontal constraint (assuming it's a horizontal line). If you didn't - you need to add one. If you are new to Onshape, you might not be up to speed on how to use constraints (both implicit and explicit) and this knowledge is crucial - check the "help" and "learning center" for tutorials. Check out "defining and constraining sketches" in the help.