How to create a plane normal to the edge of a curve?

w_s856

Context: https://cad.onshape.com/documents/934a4c87b18835736d4ebebe/w/35f12551467ef51350f01893/e/619b777af64e0374bdb4d7e6?renderMode=0&uiState=667bfa14002c9558fa44df06

I want to sweep a square along a simple figure. The square is on Plane 2 and initially the smaller half-circle in Sketch 1 was at 180° so I chose a "Point Plane" category for the plane. Worked great.

I then realized that I needed to close the small circle a bit more (it is supposed to be a hook) so I went from 180° to around 220° and this resulted in sharp endings (the plane was not normal to the line anymore). To fix this I need to set Plane 2 so that it is normal to the edge of the line of the smaller arc, to which I used "Point Normal". This is what the document above is supposed to show.

I must understand "normal" wrong, for me this means "perpendicular" - so a plane that is perpendicular to the end of a line. What I get is a plan which is parallel to the line 🤨. (and of course the whole sweep fails)

What am I doing wrong?

glen_dewsbury

Using mate connecters to place sketches at the end of curves will allow the normal to float with the curve.
https://cad.onshape.com/documents/a65b637f23fe641068d47f86/w/0d794835be9d9b76b50e50d6/e/ab044681c0f41b7de2de0c4d

eric_pesty

w_s856 said:

Context: https://cad.onshape.com/documents/934a4c87b18835736d4ebebe/w/35f12551467ef51350f01893/e/619b777af64e0374bdb4d7e6?renderMode=0&uiState=667bfa14002c9558fa44df06

I want to sweep a square along a simple figure. The square is on Plane 2 and initially the smaller half-circle in Sketch 1 was at 180° so I chose a "Point Plane" category for the plane. Worked great.

I then realized that I needed to close the small circle a bit more (it is supposed to be a hook) so I went from 180° to around 220° and this resulted in sharp endings (the plane was not normal to the line anymore). To fix this I need to set Plane 2 so that it is normal to the edge of the line of the smaller arc, to which I used "Point Normal". This is what the document above is supposed to show.

I must understand "normal" wrong, for me this means "perpendicular" - so a plane that is perpendicular to the end of a line. What I get is a plan which is parallel to the line 🤨. (and of course the whole sweep fails)

What am I doing wrong?

That plane2 does look odd, maybe report to support it in case it's actually a bug?