SPINNING LEARNERS

LOW RKM REASONS TO START WITH SLIGHTLY RICHER MIXING AND BACK TO USUAL MIXING% GRADUALLY. AVOID BYPASSING OF THE BEATERS. CHANGING OF THE CARD LINES TO BE AVOIDED . TO START WITH HIGHER NOIL% AND REDUCE GRADUALLY TO USUAL    IF REQUIRED. SOFT WASTE ADDING TO BE AVOIDED FOR FIRST 3 OR 4 MIXINGS. IN SIMPLEX M/C CHECK THE FOLLOWING     a) FALSE TWISTER CONDITION     b) FLOATING CONDENSER CONDITION .     C) DAMAGE COT/APRON .     d) DEFECTIVE SADDLES .     f) TOP ARM LOAD .     g) PRESSER EYE CONDITION .     h) FLUFF ACCUMULATION ON FLYER HOLE .     i) BOBBIN CLEARANCE VARIATION .     j) CONE DRUM NOISE     k) FEED CAN CONDITION         l) SLIVER SPITING . IN SPINNING M/C CHECK THE FOLLOWING:     a) CRISIS-CROSS ROVING .     b) BOBBIN HOLDER ROTATION .     C)DAMAGE COT/APRON.     d)DEFECTIVE SADDLES.     f)TOP ...

RKM INFORMATION This can be expressed by the “Length of yarn in km” at which yarn will break of its own weight”. This is equivalent to breaking load in g/tex. RKM is the short expression for “Reisskilometer” – “Breaking-kilometre”, which is an unit out of date. E.g.: a Cotton-yarn with 15 RKM means, it would break of its own weight, if you wind off 15 km of the yarn and hang it up in 15 km. Nowadays it is common practice, to use the unit Centi-Newton per Tex (cN/Tex) or gram-force per Tex (gf/Tex). RKM and cN/Tex or gf/Tex are practically the same (a slight difference would be there)   SINGLE YARN STRENGTH (Breaking force) :  This is the force required to break a strand of single yarn. It is expressing Centi-Newton (cN).     STRENGTH (Tenacity) : The Tensile Strength expressed as force per unit linear density is called Tenacity. This is normally expressed as gram force per tex (gf/tex).   CSP (Count Strength Product) : CSP, the bundle strength...

REDUCING CLASSIMATE FAULTS 1) Count wise online Classmate classes wise results to be record on daily basis 2) Before allotting this work we want to educate quality investigator about Classmate faults and also class wise reasons we want to explain. While noting time investigator has highlight which class is having continuous higher side and same one communicate to that concern dept with reasons 3) We want to fix which classes we want to reduce 4) On daily basis monitoring we can get idea in which zone we r having problem and which zone we want to improve the work methods and process  5) Based on trend analysis we want to inspect process auditing and find out practical problems and also Training awareness we want to give to operators for reducing some classes  6) We can take process trials based on Online Classmate results  7) Regularly we want to compare daily Online results Vs Trial sample results for knowing Where we are Note: Choosing of quality investigator is import...

REASON FOR LONG AND THIN FAULTS 1. Excessive incidence of web falling, partial or full in cards. This is due to cotton used with higher mic value, or poor Rh%, or higher web tension draft. 2. Too high a creel draft, or break draft, or web tension draft in drawing. 3. Excessive variation in top roller pressure in drawing. 4. Worn out top roller end bushes, or worn out shells in draw frame. 5. Disturbance for the free rotation of creel calendar roller. 6. Sliver stretch on the creel ,of the simplex due high creel tension draft, or creel roller drive struck up. 7. Too high a break draft in simplex. 8. Excessive roving stretch, due to improper function of builder motion mechanism. 9. Use of empty roving bobbin in simplex, with wide variation in bare bobbin diameter. 10. Sliver splitting in simplex, while drafting, or sliver splitting on the creel. 11. Sliver not running, in the center of the top arm. 12. Creel stretch of roving in ring frame due to obstruction in free ...

COMBER INFORMATION:- FORMULA :- COMBER NPM PRODUCTION FORMULA 8HRS:- FORMULA = NPM*8*60*NO. OF HEADS*FEED PER NIP* GMS /PER METER*(100-NOIL)/1000*1000*100*EFF/100 EXAMPLE:- Delivery speed in NPM = 475 FEED /PER NIP = 4.75 NOIL = 18% Eff = 95%     In the above formula 8 means 8Hrs(Per shift), 60 means 60 Minutes =475×8Hrs×60Min ×8 HEADS ×4.75 ×70(100-18) ÷1000÷1000÷100×95÷100  = 472 Kgs/Per shift. COMBER FEED PER NIP FORMULA :- FORMULA = 3.14 ×BOTTOM ROLLER DIA ÷RATCHET WHEEL TEETH EXAMPLE:- Ratchet wheel teeth = 20 Bottom roller dia = 30 FEED /PER NIP = 4.71 =3.14×30 ÷20  = 4.71 TYPES OF FEED :- 1. Forward feed (concurrent feed):Feed of the sheet into the nippers occurs  while the nippers move towards the detaching roller 2. Backward feed (counter-feed) : Feed of the sheet occurs during return of the nippers • Higher Noil % always improves the imperfections in the final yarn. But the strength and other quality parameters improve up to certain noil %, furthe...

RINGFRAME BREAKS REASON  1. Bobbin holder struck up. 2. Vibration or jerky motion of ring rail. 3. Vibration or eccentric spindle driving pulleys. 4. Slack spindle tape or lower spindle tape tension. 5. Worn gear wheel and deep meshing of gears. 6. Choking and improper alignment of suction tube. 7. Spindle out of center with ring and lappet. 8. Cracked and worn bobbins. 9. Improper fit of bobbins. 10. Incorrect bobbin diameter. 11. Roving condenser choking with waste. 12. Worn out rings or life ended rings. 13. Too close traveller clearer setting. 14. Total draft is too high. 15. Damage spacer. 16. Improper working of traverse motion. 17. Break draft not optimum. 18. Apron running with lower tension. 19. Worn out aprons. 20. Cots running with surface damage. 21. Incorrect shore hardness of top rollers. 22. Insufficient pressure on top rollers. 23. Incorrect apron nip opening and settings. 24. Excessive twist in roving. 25. Lack of cont...

YARN CLEARER INFORMATION 1.Winding speed should be around 1250 meters/ min 2. Machines with tension management is preferred 3. Clearer settings should be as close as possible.  Loepfe   Yarn master setting is given below N -4.0 (nep) : DS-2.0 (short) : LS-1.6 (short) : DL-1.18 (long) : LL-40 : (long) -DS-14%(thin) : -DL-40(thin) Since Loepfe  has a facility of class clearing. "C"s to be added in such a way that the following faults which are displayed in Loepfe  class clearing should be cleared. A4,A3,B4,B3, B2(50%),C1,C2,C3,C4,D1,D2,D3,D4,E,F,G,H1(50%),H2,I1,I2 4. Count channel setting should be less than 7% 5. Setting for cluster faults should be set such that, if a yarn produced without bottom apron, or damaged rubber cots is fed, it should be cut by the clearer 6. Long thick faults in the cone yarn should be zero 7. Long thin faults should be zero 8. If the waxing attachment is below the clearer, the clearer should be cleaned once in a day 9. ...

REELING FORMULA Index wheel*1.5*7*no of hanks per Knott*no of Knott per bundle/840/count/2.204 Cop content formula Formula : 3.25 X L X D2 (D square)  L = Lift  D = Full dia of cop or Ring dia  Ex = 3.25*6.7"(1.5"*1.5") = 48.9 gms

SPEED FRAME INFORMATION 1. Total draft should be around 10 for 4 over 4 drafting system 2. Better to use floating condenser in the front zone to reduce hairiness and the diameter of the roving 3. Cots buffing should be done once in two months. top roller run out to be checked and it should be nil. There should not be any compromise on top roller quality. Top roller cost for speed frame is negligible if it is compared with ring frame. 4. If possible it should be treated with surface treatment like treatment with LIQIMIX or treated with acid to reduce top clearer waste which is caused by top roller surface 5. Twist Multiplier should be high enough to reduce stretch in Ring frame. Higher the T.M lower the classimat "H1" faults 6. If single speed for flyer is used, it is advisable to run less than 1000 rpm 7. When the speed frame bobbin is full, flyer speed should be less than 1000 rpm. Otherwise surface cuts will increase and thin places also will increase 8. ...