Dear Willem,
I do know how to rotate sketch and in newly attached file you can see that the base of the sweep is not on the the cutline anymore but it still do not work properly. I have also rotated base points of cylinder but it do not help neither :/

Unfortunately I have again the same issue :/ I tried to create the same part from the beginning in Freecad 0.17 with this new features but I have still the same error, and I cannot findout where is this issue with "coplanar problem". Is there any possibility to highlight this issue or how ...

Hi Willem,
thank you for you fast and clear answer.
Now I understand it worked awesome !

Dear Freecad Community, I have an issue with "Make a cut with two shapes". I want to create coupler D25L30 5mm to 10mm and figure is almost done. I just need to cut sweeped helix with finished cylinder, but after this operation outer shape is disappearing. Please find attached image before...