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Twist Contraction & Front Roll Count

Calculate yarn count at front roller considering twist contraction percentage.

Yarn count at front roll (Ne)
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Method and formula

TC (%)=Countfront roll−CountbobbinCountfront roll×100Countfront roll=Countbobbin1−TC (%)100\begin{aligned} \text{TC (\%)} &= \frac{\text{Count}_{\text{front roll}} - \text{Count}_{\text{bobbin}}}{\text{Count}_{\text{front roll}}} \times 100 \\[1em] \text{Count}_{\text{front roll}} &= \frac{\text{Count}_{\text{bobbin}}}{1 - \frac{\text{TC (\%)}}{100}} \end{aligned}

Input variables

VariableExpected entry
Count on bobbin (Ne)Enter a positive measured value.
Twist contraction (%)Enter a positive measured value.

Calculation workflow

  1. Enter the measurements in the displayed units.
  2. Check the selected yarn, fiber, weave, or trade unit where shown.
  3. Review each calculated output and its unit.
  4. Use Copy results to save the displayed values to recent history.

Outputs

  • Yarn count at front roll (Ne)