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Virtual Sharps and Arcs
martin_kopplow
Member Posts: 700 PRO
I know how to create a dimension to a virtual sharp with two lines. Here I have a situation where I would want to dimension a virtual sharp with one line and one arc:
See red dot. It would to be a 'virtual diameter', then. The small radius on the edge would be added after the part has been lathed to the to-be-dimensioned diameter.
The help files don't say nothing about this. How would I do that?
Best Answer
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MDesign
Member Posts: 591 ✭✭✭
With the latest update, Can you not just set a sketch point coincident with the line and the arc and then dimension to the point as needed? Or did I misread what your are trying to do?
1
Answers
The workaround I use to add a virtual sharp to a curve line intersection is to create a sketch in the model then show that sketch on the drawing. I will also change the color of the sketch on the drawing to help visualize the TSC.
Twitter: @BryanLAGdesign
@bryan_lagrange In that case, do you create a sketch plane in the expected view plane? In my case here that'd be an angled view.
I tried sketching a line (coincident/parallel) and a circle (concentric/coincident) in the drawing view, put a point at their intersection point, dimension that point and delete line and circle.
For some reason the dimension and the points remain in place.
Not really happy with it, though, for it is a multi-step workaround that might or might not survive updating the drawing.
With the latest update, Can you not just set a sketch point coincident with the line and the arc and then dimension to the point as needed? Or did I misread what your are trying to do?
Hmmmmm ... maybe that's what actually happened in the background. I had difficulties setting a single sketch point that way. It appears a single free floating sketch point, once created, isn't individually selectable in a drawing view. So it is impossible to select both a line and the point for applying a coincidence like it is done in a sketch. If I select the coincidence tool fist, it lets me select model derived drawing geometry, but not the point I put in manually. The selction process is rather like: Select the coincidence tool first, then select the line, then the point (point hops to line), hit esc, then select the tool again, then the arc, then the point. Never attempt to select the point first.
I tried again with a simplified example and it does in fact work: Ideally the point is created directly on the line (as opposed to roughly in the empty place I needed it in) to automatically apply the line constraint in the process and link it with the view. Only then could I apply a second coincident with the arc, that way sliding the point off the line towards the intersection point.
Now, knowing that, I can reperat it, but this inconsitency in behaviour mislead me first. I still think it is not good and should rather work like in sketches.
Its definately not impossible to select the point in drawing mode but they sure do make it difficult. LOL. zooming out to select the point helps… a lot.
Haha. Usually, if I don't hit something right, I rather tend to zoom in … ;0)