Winding
A winder is rated in metres per minute and paid in kilograms after the stops.
— kg/h
After splicing, doffing and other losses
Gross output assumes the drum runs at the set speed whenever it runs; automatic winders ramp up after every splice, so the true average speed is slightly below the setting and this reads a little high on a yarn with a high cut rate. The splice cycle time entered should be the whole cycle including the yarn-end finding and the restart, not the splicer actuation alone - the difference is typically a factor of two. Doff time assumes the drum stops for the change; machines with automatic doffing and package transport overlap most of it and the doff loss approaches zero. Package length is computed from nominal weight and count and takes no account of the tube weight, which must be excluded from the package weight entered.
Winding Production, Splice Loss & Effective Drum Efficiency — free, with the formula and a worked example, at Textile School.