Count systems, twist, hairiness, strength, evenness. Spinning routes and quality economics. This section explains practical decision criteria, typical test methods, and failure modes that matter in real production. Readers get checklists, calculation steps, and case examples connecting specifications to cost, reliability, and compliance. Links map core concepts to upstream inputs and downstream processes so choices remain consistent across sourcing, manufacturing, and end-use performance. Each article includes definitions, diagrams where helpful, and plain-language notes to help newcomers ramp quickly while giving experienced professionals the depth needed to troubleshoot and optimize. Standards references are cited with context, and whenever trade-offs exist, we make them explicit so you can defend decisions. The coverage also includes metrics, data tables, and example calculations so results are reproducible. Where regulations apply, we highlight jurisdiction, scope, and verification pathways. Tools and templates are provided to speed up daily work without sacrificing rigor.
Spinning & Yarn
Computes package volume as the conical frustum a cone actually is, gives the packing density from the wound mass, the yarn length it holds, the build thickness and cone taper angle, and the margin against the maximum density that package dyeing allows.
Calculator
Spinning & Yarn
Converts winding speed and yarn count into gross drum output, then subtracts the time lost to clearer cuts and package doffing to give the net production per drum and per machine, the splice count per package and the effective efficiency.
Calculator
Spinning & Yarn
Converts twist and yarn count into twist multiplier, surface twist angle and a twist-energy index, and predicts the snarls a doubled loop will form from the fraction of twist released – with the effect of steam setting taken out separately.
Calculator
Spinning & Yarn
Converts elastane supply count and core draft into the delivered core linear density inside the yarn, the core ratio by mass, the sheath that surrounds it, and the wall thickness of cover that separates the core from the yarn surface.
Calculator
Spinning & Yarn
Totals clearer cuts across the thin, thick, nep and foreign-fibre channels, converts them into cuts per hour, splices per package, production time lost and yarn wasted, and reports what share of the faults present is actually being removed.
Calculator
Spinning & Yarn
Converts air-jet or vortex delivery speed and yarn count into production per position and per machine, then totals the compressed-air demand, the compressor power behind it, and the energy and cost that air adds to every kilogram of yarn.
Calculator
Spinning & Yarn
Converts mean single-end strength and its coefficient of variation into strength percentiles, the expected weakest place over a stated length of yarn, and the safety factor against running tension measured on both the mean and that weakest place.
Calculator
Spinning & Yarn
Links rotor speed and delivery speed to twist per metre and twist multiplier, computes rotor peripheral speed and the centrifugal acceleration at the rotor groove, checks rotor diameter against fibre length, and reports production per rotor and per machine.
Calculator
Spinning & Yarn
Derives spinning tension from traveller mass, ring diameter and spindle speed through the centrifugal balance, compares it with the yarn strength as a tension ratio, and converts a breakage rate per thousand spindle hours into piecings, lost spindle time and efficiency.
Calculator
Spinning & Yarn
Derives ring-frame total and main draft from roving and yarn linear density, checks the front control distance and back zone setting against effective fibre length, and computes the limit irregularity from the number of fibres in the yarn cross-section.
Calculator
Every record in these registers was sent in by somebody. Submissions are reviewed before they are published.
1,496 machines in the register.Tell us about a missing one 306 event series in the register.Submit a trade fair or conference 3,038 standards tracked in the register.Get the changes by email each week