The best control is to create a second helical curve with a larger radius and use that curve to orient the X-axis of the sketch. If the cut is normal to the original curve the second curve probably needs to extend farther to make sure that at each point on the trajectory curve, the plane normal to that point intersects the orientation curve.
There should also be the option to have the orientation be automatic but I think the direction control is better. It looks like your choice was a constant orientation.
you are right, you have used trajpar, I have used helical curve since I will be using the same curve for manufacturing.
Can we get the helical curve from the bottom of the curve.
Actually the helical cut stop in the centre of the cylinder the curve will exit with the radius and line at angle.
Hope we can connect helical curve with radius and line to create the sweep feature.
Thanks for the support.