You will frequently need to correct a sketch (trouble-shoot) with the Part-Editor.
Below, we list the most frequent problems and the procedures to follow to resolve them.
Note: We use these terms for sketch-elements: Blue if it is not fully-defined, and Black if it is fully-defined.
Sometimes, a sketch-element is BLUE and you cannot add more constraints.
You might be able to drag a sketch-element that is BLUE, but when you come to add a new constraint, MechDesigner does not accept it.
In this case, a new constraint may need to reduce two degrees-of-freedom from the sketch, but the sketch has only one degree-of-freedom that remains.
If the end-Point of a Line has a Coincident Constraint with a Line, X-axis or Y-axis.
Then: it is not possible to also add a new Coincident-Constraint between the Point and a different Point.
To delete the constraint:
If your sketch disappears:
- or -
The sketch-elements become BLACK when you believe they should be BLUE.
To correct this problem, do one of these actions:
- or -
If the sketch-elements remain BLACK, then the
To delete a constraint you must 'find the constraint':
You may need to delete more than one constraint. When sketch-elements becomes BLUE, add a different constraint or the sketch-element again.