Adding a Centerline to a Hidden Hole / C-Bore on a Drawing

jacob_kaessinger

So, I figured this would be pretty simple to do but I'm stumped as to how to do this.

I'm trying to add centerlines to the four hole / counterbored hole features on the below part. It will not be necessary to dimension to these, but the hidden lines should be there per good drawing practice.

However, when I select the "Line to line centerline" tool, it won't let me select the hidden lines. I got the centerline at the middle of my part using the two-point centerline and the midpoint snaps. How can I add the other lines without guessing at their locations?

NeilCooke

Hi Jacob, this is a known limitation and on the todo list, but it you could create an improvement request in the category on the right ----> it will get voted on and get higher priority.

jacob_kaessinger

Thanks for letting me know!

PeteYodis

@jacob_kaessinger As a current work-around... Create a section view or section views to capture the center of these features.  The geometry in the view will now be visible and you will be able to created centerlines and dimension the geometry.

viru

@jacob_kaessinger,Currently in Onshape drawing not possible to give centerline and dimensions from hidden edges and line. Dimensioning and centerline from the hidden line as in NX will minimize user’s effort to create the additional section view to show the dimensions from internal references especially when drawings for simple parts need to be created. You can raise the improvement request ticket for this issue. I hope in near future this facility will provided by Onshape.
Till time please refer below video workaround (By creating section view) as suggested by @PeteYodis

 

jacob_kaessinger

Pete, Veru,

Thanks, I do know that I can add this via a section view. I ended up not needing one, and the centerlines don't really have to be present.

brian_brady

jacob_kaessinger said:

Pete, Veru,

Thanks, I do know that I can add this via a section view. I ended up not needing one, and the centerlines don't really have to be present.

They should be present to convey the shape, even in a view where they are shown as hidden, because that is good practice relative to standards. Dragging centerlines to make them randomly makes them look like crap. (Not referring to what you've done, but the work-around that @viru shows). We need a way to tweak drawings to make them look correct relative to standards if OS is not going to do it automatically. We've had mainstream 3D parametric CAD for about 30 years now and in my opinion, not one of them is as good as plain old AutoCAD at making standards compliant 2D drawings. OS may be the furthest from expectations at this point.