Sketch dependency confusion, simple extrusion breaking

[ABukowski]

Apologies - I've somehow managed to get it working without falling over after a few closes and re-opens!

Hi, I hope someone may be able to help with a newbie question.

It's my first time using Fusion, and I've not used any CAD for a long time.

I knocked together a strainer for a test 3D print, and the dimensions were slightly off by about 1mm, so I wanted to go back and edit the original sketch diameter to make the change. However, when I edit the original sketch all my other history becomes disabled with no way of turning it back on, even the first step of simply extruding the sketch upwards - this stays the same even if I revert to the original dimensions.

Only if I Ctrl-Z back to the original will my history re-appear.

I can edit other parts of the timeline without any problems, and I understand that it could cause issues further down the timeline, but I'm struggling to understand why the first step of extruding the basic sketch upwards becomes unusable?

Many thanks

[g-andresen]

Hi.

what sketch and what diameter are you talking about?

günther

[ABukowski]

It was the original 54mm sketch - for some reason whenever I edited it the whole history dependencies would become unusable.

A couple of restarts later though it was working fine - I jumped too quickly to asking the question. Seems it was a bit of a glitch with Fusion on my end.

[g-andresen]

Hi,

I got a little dizzy trying to understand your design.
That's why I recreated it and presented the process in time lapse in the screencast.
In the file you can follow the individual steps and make desired changes with some parameters.

günther