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Production
Calculations
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- •Turns /Metre [Tpm]
=rotor rpm {N} / yarn-delivery rate{ V Metre/min. }=N / v.
- •Turns / metre [tpm]
= twist multiplier * 100 / [tex]^1/2 = 100k / t ^ 1/2.
- •Yarn delivery rate = N / Tpm =N [T^1/2] / [100k] m/min.
- •Productions / spinning unit
[P] is directly proportional to the yarn delivery rate
& linear density [tex]
I.E. P=
60vt/1000=0.06vt therefore P={ n[t^1/2] /100k} 0.06t = 0.0006n
[T ^3/2] /K gm/hrs.
- •Thus , the production per spinning unit of an open end
spinning machine {at 100% efficiency} is determined only by
the rotor speed , which is normally fixed for a given design ,
& the yarn linear density & twist .
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