Fusion
@davebYYPCU wrote:
What can be done?
First words in your video, were 3d sketch,
then first thing you show us is that sketch that is not fully defined,
Asking parameter changing to be stable in either type of sketch is unreliable to say the least.
Might help....
Before commenting on a screencast it might help to take a look at the assembly, scroll through the timeline and see how it behaves.
This issue is the same or very similar as the OP posted in this thread.
Heck even if I apply a rigid group to the Kick STD 1 Sleeper v5 assembly, before patterning some the rigid group stuff "jumps" around. There is a serious bug at play here!
Extrude direction for 3D sketches is inherently unstable. For a 2D sketch, the extrude direction can be tied to the sketch normal, but for 3D, we have to rely on computing the direction based on the profile itself (using cross products, etc). That can be unstable under edit. For that reason, it is best to stick to 2D sketches whenever possible, and use 3D sketches for things like sweep paths, loft guide rails, etc. Alternatively, if you really want to use 3D sketches, you can define your own direction using Sweep, but you lose a lot of functionality that is available in Extrude.
Jeff Strater
Engineering Director
I am going to suggest something unusual, but it is incredibly stable and efficient.
There is not doubt about which way the normals point either.
Instead of creating a base sketch and then multiple individual sketches that basically define the sides of a box, why not just create an extrusion, a solid body with 6 sides that you can create further sketches on if/when needed.
I personally welcome any opportunity to simplify or even avoid sketches ... in any CAD application.
You can always remove the body at the end of the timeline if you don't want additional stuff in a BOM.
See how short that timeline is.
