Groove on cylinder top
I guess one would either use support geometry or fuse one cylinder and a part:Design:Revolve in 0.16 PartDesign.
Parametric: You can change all cylinder properties, The groove is centred on the slope with a 1/4 slope length radius.
While playing with this I lost visibility of the construction plane, it would not toggle back to visible until i restarted FreeCAD.
I also discovered som strange behaviour while editing the sketch, While being in edit mode the auto-constraints suggested while drawing a horizontal line was vertical and visa versa. This switch also applied to manual constraints I made. If I applied a vertical constraint it became horizontal.
Will monitor for this behaviour and see if I can replicate.

- Screenshot_20160501_202721.png (44.88 KiB) Viewed 5983 times