Parabola in sketches

paul_inman

Does Onshape have a parabola tool for sketches (like Solidworks)?   I'm trying to draw parabolic reflectors

Narayan_K

paul_inman , At this stage Onshape doesn't have this tool.

viru

@paul_inman, Currently this facility is not available in Onshape. You can raise improvement request for this. In near future we hope that this facility will be provided by Onshape. Till time you can use below work around.
Workaround:- Onshape introduces a " conic fillet " capability in fillet which is useful in making complex shapes. The Conic fillet function lets us control the shape and size of each fillet to create smoother, more beautiful blends and fillets. This gives user to more choices and control over the look of your parts, including control of curvature. As a result, user can create smoother transitions between adjacent faces.
Conic fillet controlled by Rho value.User can give Rho value from 0 to 0.9999 for getting different types of conic curvature as shown in below image.


User can get Rho line by drawing perpendicular line on center of the line made of horizontal and vertical point of fillet distance. Rho line divide in 10 equal half for seeing working principle as shown in below image.
Working principle are in below video,



Now with the help of above information you can use conic fillet option to fulfill your requirement.

NeilCooke

Or you could use FeatureScript to automate the entire reflector design?

john_f_carr

You can generate a conic section by intersecting a cone and a plane.  Or you can use FeatureScript to build a spline through calculated points approximating a parabola.