Dimensions

rob_marshall

I'm not dimensional technician, or a cad user on the whole, but in the absence of such, I've been given the task. Basically, I need to determine the position of a hole, and the radii, on an iges file we have been sent. Our tool maker, who used previous software, we no longer have, says he needs the intersections, and centres of each hole, from the datum line? I've attached a small section of the drawing to show you what I'm seeing. Sorry I can't be more specific, but as I stated, I'm not a CAD expert.

owen_sparks

Hi Rob.

Sounds doable.  First import iges to make solid part then make drawing from it showing the dimensions you're after.

If the contents aren't sensitive then if you make something public I'm sure you'd get some help here if you need it.

Cheers, Owen S.

rob_marshall

Thanks Owen. Won't I have to put the dimensions on myself to make a drawing? I've got the file imported into Onshape. As for sharing, I'll have to wait until tomorrow when my boss returns. Don't know how sensitive it is.

owen_sparks

Hi Rob.

In OS we have sketches and drawings.

Sketches are created to drive geometry and build things.

Drawings are derived from parts and have the measure tools we want to be able to take your part and spit out it's dimensions.

You have to tell the drawing which features you want to measure, but it'll work out the sizes for you.

Hope that helps,

Owen S.

rob_marshall

I have the iges file on my workspace, but where it says parts it's zero, but 166 surfaces?

rob_marshall

Tried to create a drawing from the iges file, but it's not showing anything. I'm getting desperate now. Can't share the file I'm afraid.

Narayan_K

@ rob_marshall , To create drawing you need part.since you have only surface in that iges file,you are not able to create drawing for surfaces.
To create part you have to thicken the surface.

rob_marshall

Thanks. I think I'm going to have to abandon the project. I've no idea what I'm doing.

rob_marshall

Ok. I selected all 166 surfaces, and clicked on thicken, to hopefully create a part, but don't know what changes I should make in the dialogue. Am I adding, removing, intersect? And what direction? I just want to create a solid part from the surfaces.

rbaek

If you just need the measurements, you can select items and on the bottom right we show relative measurements based on what's selected. (ie you select two points, it will show you the delta x,y, and z measurements).