Constructing theoretical cylinder

[[To...]]

I am having a part with a theoretical cylinder constructed on a V-block.
I have absolutely no idead how to construct it.

The red V-block is my actual part.
The blue Ø8 circle is the cylinder which I would like to construct.
Any ideas on how to make this cylinder?

[[Ma...]]

One way using curve or other way - using 2x 2d lines and using tangent construction.
Repeat as many times as you need to fill length of a part ( recalling tangent constructions into 3d line to get axis )

[[Da...]]

[list=1]

Measure both planes of the V-block, preferably as outer tangential elements

Construct both possible symmetry planes (both are perpendicular to each other) from those planes

Construct an intersection line from the symmetry planes

Create a new coordinate system with the intersection line as primary alignment

Use the new coordinate system to construct two theoretical lines at the centroids of the V-Block planes parallel to the planes

Use the tangent function with those two lines to create a tangent circle with the right diameter

Construct a theoretical cylinder at the same coordinates, same direction, same diameter as the circle

Tadaaa...

[[Ün...]]

it might be useful

[[To...]]

Please sign in to view this quote.

Using curves and "Circel in contour"?
Just found this feature, so never used it.

[[Ma...]]

Please sign in to view this quote.

Yes - circle in contour.
But using planes with outer tangential -> offset plane from them by radius and cut can be done too. So many good ideas are shown here.

I have similar problem unsolved - i have to measure a part ( cylinder ) and get distance from center of cylinder ( fit into this 90° piece ) to another plane.

[[Jo...]]

Please sign in to view this quote.

Not to hijack, but here is the inverse of the procedure. Use formula to get sqrt(cylinder radius) andcopy another into a rotated alignment. Then you can get intersection.

root.jpgint.jpgtang.jpg

[[Cl...]]

Please sign in to view this quote.

Yet another way.

[[Ma...]]

Please sign in to view this quote.

I am not quite sure I understand your post. Are you answering to author's quiestion or mine not-solved?
Mine don't need this type of intersection. I need to measure cylinder and report it's center axis distance to a plane, but center axis of a cylinder needs to be obtained like this V shape.

Or i'll try to use planes with locked angle and outer tang. with recalled points from part of a cylinder - perhaps this would work for me.