This is the tutorial
Checklist the "References" in "PathFinder" to show main plane
Sketch a circle on "XZ plane" with diameter=20mm and distances=30mm like the picture below
sketch an axis that connect with X axis, dimension=200mm (the axis dimesion is no effect on the final result), dont forget to make circle origin "connect" with Z axis like the picture below
In solid feature, click add>helix
Click the circle and axis sketch, then click "Accept" or push "enter"
Click "Helix Options" to show more option
fill the parameter:
Helix method: Pitch & Turns
Clik "OK" then push "enter"