Spinning calculator
Speedframe / Ringframe Twist Per Inch
Calculate Twist Per Inch (TPI) / Twist Per Meter (TPM) from spindle speed and front roller surface speed.
Twist Per Meter (TPM)
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Twist Per Inch (TPI)
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Method and formula
Input variables
| Variable | Expected entry |
|---|---|
| Spindle speed (RPM) | Enter a positive measured value. |
| Front roller surface speed (meter/min) | Enter a positive measured value. |
Calculation workflow
- Enter the measurements in the displayed units.
- Check the selected yarn, fiber, weave, or trade unit where shown.
- Review each calculated output and its unit.
- Use Copy results to save the displayed values to recent history.
Outputs
- Twist Per Meter (TPM)
- Twist Per Inch (TPI)