Selecting origin position for spur gear

stefan_nilsson

When creating a spur gear i was not able to select anything when i ticked the box "Select origin position". The text was "Sketch vertex for center" no matter what i did

Jake_Rosenfeld

Hi Stefan,

This text is indicating that the feature wants you to select a "sketch vertex" to be used as the center.  The reason this uses sketch vertices and not all vertices is that if you specify a custom center, the feature needs to be able to evaluate the sketch plane of the center vertex to determine the orientation of the gear.

So, make a sketch before the "spur gear" feature and put a point in that sketch.  You will be able to select this vertex into that dialog box.

https://cad.onshape.com/help/Content/sketch-tools-point.htm

Jake_Rosenfeld

Hi Stefan,

This text is indicating that the feature wants you to select a "sketch vertex" to be used as the center.  The reason this uses sketch vertices and not all vertices is that if you specify a custom center, the feature needs to be able to evaluate the sketch plane of the center vertex to determine the orientation of the gear.

So, make a sketch before the "spur gear" feature and put a point in that sketch.  You will be able to select this vertex into that dialog box.

https://cad.onshape.com/help/Content/sketch-tools-point.htm

stefan_nilsson

Thank You!
I did try everything BUT an explicit point, intersections, midpoints etc. Would it be a sound suggestion that implicit points like the ones mentions would qualify as vertices in future versions?

Jake_Rosenfeld

@NeilCooke wrote the script, I can discuss this with him. It could be possible to use any vertex if the normal of the gear was specified specified separately.

NeilCooke

It has to be a sketch vertex, so that can be a point or where an entity terminates or joins another.