Package & Guides Furthest end

Unwinding Tension at Package cN

Guides Passed no.

Wrap Angle per Guide °

Guide Friction Coefficient

Creel Air drag

Distance to Furthest Package m

Drag per Metre of Run cN/m

Tension from the Furthest Package

— cN

At the beam, after all guides and drag

Build-Up & Spread

Capstan Friction Factor: — ×
Tension After Guides: — cN
Tension Added by Drag: — cN
Tension from the Nearest Package: — cN
Front-to-Back Spread: — cN
Spread Against Nearest: — %

The nearest position is taken as one guide and no run length, which is the best case rather than a real creel row. Capstan friction is exponential in wrap angle, so removing one guide or easing one wrap does far more for the spread than lowering every package brake.

Creel Tension Build-Up & Front-to-Back Spread Modeler — free, with the formula and a worked example, at Textile School.