Textile Technology :: "Open End Spinning"

Production Calculations

• •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 .