Meesed up on editing spline curve

公伸_伴

Hello.　When I proceeded with writing with the spline curve function of the sketch, a problem occurred when editing.  I want to move some specific points and edit the fix, but doing so affects the whole thing and all of the curves move and get messed up.  Please tell me the method that does not affect the whole.  Please tell me how to recognize in advance when the part that is not visible on the screen will be affected.

IgnacioMartos

Hey! Try using the final button when you are making changes: https://www.onshape.com/en/resource-center/tech-tips/tech-tip-how-to-use-onshapes-final-button 

This will help you visualize how the change will impact the rest of the model before you commit anything. 

jake_delano19

Due to the nature of splines, moving a single point on the curve is going to have an affect on the curvature of the entire spline curve. To have the most control over your spline curve, we recommend that you use as few spline points as possible and utilize the tangent handles of the spline as much as possible. To learn more, visit the Spline page in the Onshape Help Center.

In terms of recognizing in advance for how a design is going to be affected by a change ahead of time, you can use the Final button in the sketching dialogue to see how any changes in a particular sketch are going to affect your design further down in the modeling process. Check out our Tech Tip for using the Final button for a further explanation!