Ring Spinning
Coil pitch is the sloughing-off control. Set the rail speed to the pitch you want rather than reading the pitch off whatever the rail happens to be doing.
— mm/min
Rail travel that produces the chosen coil pitch
Coil length is taken at the ring diameter, so the figures describe the full-diameter part of the chase; the nose of the cop lays shorter coils and fills faster.
Cop Building Motion & Traverse Speed Optimizer — free, with the formula and a worked example, at Textile School.