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Midpoints in bends on a tube

Hello all. I was wondering if anyone could explain how to get some of these points in this drawing, and hopefully help in getting a dimension.

For this part, I would create a plane on the left end of the part, followed by cylinders for each straight. Then a plane on the right side. Next, I would construct a pierce point for plane 1 and cylinder 1 which would give me midpoint 1. Then construct an intersection point between cylinder 1 and 2, and that would be midpoint 2. I would continue this for the rest of the tube until i get to the last pierce point giving me midpoint 7. I have learned that i can create a cast point on cylinder 2, and it will give me midpoint 2.2; however, I have not yet been able to figure out a way of getting any of the x.1 midpoints.

That is where my question starts: How can i get these .1 midpoints? I feel like I've tried every combination of picking two cylinders and all the different types of points, and have had no luck in getting them. I have XYZ coordinates for these points, but more importantly, i have length-of-straights dimensions that are taken as a measurement between for example 1 to 2.1. This is a crucial measurement to the fit/form/function of our part, and as of now, i have absolutely no way of checking it.

My second question is this: Almost every part we have has a dimension for mid 1 to mid 7 across the Y-axis (as shown). But they will also dimension in this case, the top of cylinder 1 to the bottom of cylinder 7 (relative to the Y-axis) across the Y-axis. Every time i try to measure Cyl 1 to Cyl 2 across the Y-axis (with plus diameter getting me the closest), I never can seem to quite get a passable measurement.

Any help in either of these matters would be greatly appreciated.
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  • Dang cool man, that got me a whole lot closer to understanding it. I have a few questions though:

    It would seem to me, that assuming i have an alignment already, it seems unnecessary to construct planes out of my midpoints (gotten from the intersection between the cylinders) to use for the circle. However, if it IS necessary, can you explain that in a little more detail please? I've never constructed a plane before, always a shift-left click on cad, or probed it out on the physical part. Lastly, for this part of the question, can you detail what my alignment would look like. You said level to that, what is that exactly? The first plane?

    The pierce point parts of this process, i very much understand, and now I see what you meant in your origional picture. The lines you had labeled planes were achieved from the midpoint on either side of the cylinder (Or as a cast line based off that tube). Which would be the more accurate/reliable? Using the midpoints or the cast line to construct the plane?

    Secondly, Considering i am creating a 2-d feature, would i be correct in thinking i need to be in a workplane looking DOWN at the circle, in a way similar to as if i was looking at your first picture?

    Thank you SO much for your very detailed steps. I am still very new at this, and you are quite good at explaining this in a way i can understand!
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  • Dang cool man, that got me a whole lot closer to understanding it. I have a few questions though:

    It would seem to me, that assuming i have an alignment already, it seems unnecessary to construct planes out of my midpoints (gotten from the intersection between the cylinders) to use for the circle. However, if it IS necessary, can you explain that in a little more detail please? I've never constructed a plane before, always a shift-left click on cad, or probed it out on the physical part. Lastly, for this part of the question, can you detail what my alignment would look like. You said level to that, what is that exactly? The first plane?

    The pierce point parts of this process, i very much understand, and now I see what you meant in your origional picture. The lines you had labeled planes were achieved from the midpoint on either side of the cylinder (Or as a cast line based off that tube). Which would be the more accurate/reliable? Using the midpoints or the cast line to construct the plane?

    Secondly, Considering i am creating a 2-d feature, would i be correct in thinking i need to be in a workplane looking DOWN at the circle, in a way similar to as if i was looking at your first picture?

    Thank you SO much for your very detailed steps. I am still very new at this, and you are quite good at explaining this in a way i can understand!
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