Joining 2 points across a perpendicular plane

benn_banks

I created 2 semi circles on two parallel planes that are offset from eachother. I then created another plane across the flat sides of the Semi circles and im trying to sketch 2 lines from the outer points of the semi circles down that perpendicular plane. but the tool wont snap to the outer points, it will only snap to the center point of each semi circle. 

My end goal is to create a sketch to loft from one sketch to this semi tube sketch.

What am i missing? or is there an easier way to do what im trying to do?

andrew_troup

@benn_banks
It is not possible to loft from a selected group of sketch entities which do not lie on a single plane

It is possible to loft from either a face (of a solid body) or a surface, even in the case where these are NOT planar.

However for what you're trying to do, it would be much easier to loft from a planar sketch (a round-cornered rectangle) representing the upper left boundary in your photo, lying normal to the camera film plane, and then (having made a solid body representing the outside of the shroud) cut out (using Extrude/Solid/Remove) the semicircular rebate where the shroud wraps around the cooling fins. 

Narayan_K

@ benn_banks, from your description what i understood is your trying to do a guide curve to loft the two semi circle.For that your not able to select end points of semicircle.
If so you can make guide curve as below,



If above mentioned case is not you expected then please share your document or some snaps to understand more on your problem.

benn_banks

Kind of, That helped me draw the lines i wanted but it wont loft from one sketch to the other.

viru

@benn_banks , Currently in Onshape sketch entity is not snapping to other sketch entities which is drawn on sketch plane. Snapping is happening if sketch is drawn on any part face. In this case sketch entity is snap to that part face boundary only. If you made origin point in show condition then sketch entity is snapping to origin point. If you required snapping to outer points of the semi circle then u can project reference sketch entity as shown in below video.

Narayan_K

@ benn_banks, please refer below video,

benn_banks

In the pic i added above, I got the lines to show and now im trying to loft too the yellow lines and yellow arches from on the left, to the rounded sketch on the right, similar to this pic and the gap that wraps around the metal heatsink.

viru

@benn_banks , Kindly refer below link for loft feature
https://cad.onshape.com/help/#loft.htm?Highlight=loft
https://www.onshape.com/videos/lofting-in-onshape

Narayan_K

@ benn_banks, I think you have to loft profile1 to profile2 in below image,

For that you have select closed profile 1 and 2 as below,

andrew_troup

@benn_banks
It is not possible to loft from a selected group of sketch entities which do not lie on a single plane

It is possible to loft from either a face (of a solid body) or a surface, even in the case where these are NOT planar.

However for what you're trying to do, it would be much easier to loft from a planar sketch (a round-cornered rectangle) representing the upper left boundary in your photo, lying normal to the camera film plane, and then (having made a solid body representing the outside of the shroud) cut out (using Extrude/Solid/Remove) the semicircular rebate where the shroud wraps around the cooling fins. 

benn_banks

That answers it! but i get this weirdness when I do that. Buttt.......
When i made the loft i had to do a surface instead of solid, cause after, it wouldnt do a Shell from the solid. Then after the surface was formed i used the thicken tool, then extruded the circle to cut the slot out.