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Top-down workflow, holding frame for Parts
gauthier_östervall
Member Posts: 99 ✭✭
in General
This is not a question about a specific feature, it is a question about how I should organize my work in Onshape. I've read a couple of posts from pros here, which advocated the top-down approach. As far as I understand, this implies starting from the whole, then going into details. Some meant that the best was to start in the Assembly, then designing parts as needed. Some others mentioned "Skeletons", I guess the notion comes from other tools, but the principle is the same.
As a beginner, starting on Assembly is very difficult, foremost because the first projects you make tend to be single parts. I'll take this current project of mine as an example, here is a screenshot:
This is going to be an ergonomic keyboard, if everything works out as planned. The main feature is that the keys are placed in a concave well, and that it makes use of thumbs a lot more than a regular keyboard does.
Because these are the main features, and because this was what I thought could make or break the project, I started with these. It's been going well (!).
But it's a bottom-up approach. Now I need to put these two parts into a holding frame, and I'm not sure how I should go about doing that.
My questions are:
1. knowing the frame would be needed anyway, should I have start with that? The general form of the product? Since I was not sure how the shape of the parts would turn out, I felt that "feeling" the general shape would have been difficult. Maybe an early proof of concept on paper, or even in clay...
2. how do you start in Assembly if there are no parts to import?
3. with these parts above in two Part Studios, roughly placed in an Assembly, how would you create the holding frame part? Do I create a new Part Studio, import the existing parts to it and place them there just as in the Assembly above? Or is there a way to import the placement from the Assembly into a new Part Studio?
I'm trying to learn how to think right from the beginning, as well as solving what I have with as little pain as possible.
As a beginner, starting on Assembly is very difficult, foremost because the first projects you make tend to be single parts. I'll take this current project of mine as an example, here is a screenshot:
This is going to be an ergonomic keyboard, if everything works out as planned. The main feature is that the keys are placed in a concave well, and that it makes use of thumbs a lot more than a regular keyboard does.
Because these are the main features, and because this was what I thought could make or break the project, I started with these. It's been going well (!).
But it's a bottom-up approach. Now I need to put these two parts into a holding frame, and I'm not sure how I should go about doing that.
My questions are:
1. knowing the frame would be needed anyway, should I have start with that? The general form of the product? Since I was not sure how the shape of the parts would turn out, I felt that "feeling" the general shape would have been difficult. Maybe an early proof of concept on paper, or even in clay...
2. how do you start in Assembly if there are no parts to import?
3. with these parts above in two Part Studios, roughly placed in an Assembly, how would you create the holding frame part? Do I create a new Part Studio, import the existing parts to it and place them there just as in the Assembly above? Or is there a way to import the placement from the Assembly into a new Part Studio?
I'm trying to learn how to think right from the beginning, as well as solving what I have with as little pain as possible.
0
Comments
HWM-Water Ltd
Do what is easier for you to understand.
Where I work we always do bottom up, only using the top-down tools as time savers here and there. But not fully relying on them.
We tend to copy parts from job to job and make tweaks to create a unique part. So they need to be independent of any assembly contexts. So top down approach usually won't work in those situations.
Onshape's part studio environment lets you design somewhere in the middle... You draw a few parts together as a little kit. Then insert those parts into an assembly without having to create contexts or confusing links between other studios/documents.
Now I only need to get a feel of how I might want to build the actual part, but that will be other questions.
@john_mcclary Thanks for the insight. The way I did it still makes more sense to me, so I'll try to take info from internet with a larger grain of salt in the future.