How to align sketch to component

[Anonymous]

Hi,

I'm new to Fusion 360, so please be kindly with my question. 🙂 I've added a model as a component to my project and after that I've created a new sketch that is located on a face of that component. I've drawed my sketch and after that I've moved the component a little bit on the X axis. When I now want to edit my sketch, it's located on the old position of the model in the component (which I have moved). How can I align a sketch to the compontent, so that it will always stay on the same position (in relation to the compontent), no matter if I move it or not?

Best,

Benjamin

[etfrench]

Put the sketch in its own component.  Create an As Built or a Rigid joint between that component and the imported model's component.

[GRSnyder]

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@etfrench wrote: Put the sketch in its own component.  Create an As Built or a Rigid joint between that component and the imported model's component.

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Why is it necessary to do this? I don't mean this in the "Hey! How come Fusion 360 sucks?" way; I'm just trying to understand what the need to do this illustrates about the architecture of F360.

My guess is that sketches come into being at a specific point in the timeline and are fully defined at that point. All edits and updates logically occur at that point in time, even if they are in fact added later in real time. And likewise, any projections of external geometry are relative to the timeline point at which the sketch was created. Sketch projections are associative in the sense that if you edit history prior to the creation of the sketch, the sketch will update. But there is no ongoing relationship between sketch projections and their referents beyond the sketch's time point.

Is that right, or is there something else going on?

If so, another possible solution to the OP's problem is just to put the component move earlier in the timeline.

[chrisplyler]

1. If you are doing something to modify the component you brought in... make the new sketch within the hierarchy of that component, and any projections into the sketch from the existing geometry of that component will maintain reference as long as you don't break them.

2. If you are doing something that represents a different part that maybe gets mounted on that first component, or maybe is just positionally referenced to it, make a new component and use a joint to establish the position.