Ring Spinning Machine Specification and Question Answer
Latest posts by Dhinesh K (see all)
- Ring Spinning Machine Specification and Question Answer - May 4, 2020
Ring Spinning Machine LR 6/S Specification and Question Answer
1 . What are the functions of ring frame?
Answer : Drafting, twisting, winding and building
2 . What is expansion for LR 6/S ?
Answer :
- L- lakshmi
- R- ring frame
- 6- Model
- S- variato
3 . What is the draft range possible?
Answer : Up to 60
- 40s – 36.64
- 62s – 40.914
4. What is break draft possible?
Answer : 1.07 to 2.24 (1.13)
5. What is the twist range possible?
Answer :
- 3.55 to 64.77
- 40s – 25.11
- 62s – 33.13
6. What are the types of spindles and their mechanical speed possible?
Answer :
- M 21 HD – 18000 rpm
- M 18.5 HD – 22000 rpm
- M 19 VN/HN – 25000 rpm
7 .What is the type of drafting system used?
Answer : P3-1 (3 over 3) Pneumatic loaded
8 . What are the cradle sizes available?
Answer : 36, 43 & 59 mm (36 mm)
9. What are the different dia bottom rollers available?
Answer : 27, 27, 27 & 30, 27, 30 mm
10 . What are the different Top roll dia available?
Answer : 30, 25, 30 / 32, 27, 32 mm
11. What is Spindle taper ratio?
Answer : 1:64 & 1:40
12 . How will you calculate the spindle taper?
Answer :
- Spindle Taper = L/ (D-d)
- L = Spindle lift (170 mm)
- D = Dia at bottom of spindle (17.6 mm)
- d = Dia at top of the spindle (13.4 mm)
- 1:40
13. What is Wharve dia?
Answer : 18.5 mm
14. What is the Spindle gauge?
Answer : 70 mm
15. What is the type of ring used?
Answer : Emperor +
16. What is the ring diameter?
Answer : 38 mm
17. What is Ring flange width?
Answer : 1mm
18. What is the size of bottom apron?
Answer : 80.5 X 30 X 1.05 for 36 mm cradle
19. What is the size of top apron?
Answer : 38.1 X 30 X 1.05 for 36 mm cradle
20. What is Compressed air requirement?
Answer :
1.25 Nm3 / hr
2.00 Nm3 / hr
21 . What is the drafting angle?
Answer : 45 degree
22. What is spinning angle?
Answer :
Regular: 9.5 to 14.5 (14.5)
New: 18.5 to 25.5
23. What is recommended setting of cop diameter based on yarn count?
Answer :
Coarser count – 3.0 to 4 mm lesser than ring dia (3 mm)
Finer count – 2.5 to 3 mm lesser than ring dia (2.5 mm)
24. What is lappet height setting?
Answer : 2D + 5 mm ( D is the top most dia of the empty tube)
25. What are the lappet hooks available?
Answer : 1.8 & 3.2 mm (1.8 mm)
26. How to calculate Ratchet wheel?
Answer :
Ratchet wheel = {(lift – chase length)*winding length in meters}/[doff length*0.0045*no of pins]
- Lift = 170 mm
- Chase length = 42 mm
- Winding length = 3.9 mtr
- Doff length = 3400 mtr
- No of pins = 2
27. What is the drafting pressure range?
Answer : 2.1 to 2.3 bar for 70 mm gauge
28. What is the system pressure range?
Answer : 7 to 8 bar
29. What is the minimum drafting pressure?
Answer : 0.5 bar
30. What is Break pressure?
Answer : 1.5 to 1.8 bar
31. What is Damping cylinder setting?
Answer :
Set pointer to letter C in this position key flats are vertical
Set pointer to yarn TPI
32 . What is the function of Damping cylinder?
Answer : For smooth downward movement of ring rail during doff
33. What is the oil used in Damping cylinder?
Answer : Servo system 68 oil
34. What is the oil level in Damping cylinder?
Answer : 50 to 120 mm ( While ring rail is ¾ of the cop)
35. What is the Pressure switch setting?
Answer :
Drafting: 1.8 bar
System: 5.5 bar
36. What is the drafting safety valve setting?
Answer : 2.4 bar
37. What is the slip in machine parameter setting?
Answer : Slip% = (Display speed – Actual speed)/Actual speed *100
38. What is the purpose of ring centre in the machine parameter?
Answer :
Enabling for doing ring centering without running drafting rollers and air connection
Ring center- Disable for running machine normally
39. What is the new E PROM loading procedure?
Answer :
- Switch OFF the main
- Remove old EPROM
- Insert new EPROM
- Switch ON main
- The program gets loaded in to the PLC
40. What is the procedure for removing of filter waste?
Answer :
If waste is completely pulled out it leads to return air into the filter and causing waste drum chocking.
So always leave something behind, never pull it out completely from the machine.
41. What is the procedure for unloading the ring rail?
Answer :
Normally one ring rail taken out simultaneously on both sides
While removing ring rail, place hardwood block under cam segment
Ring rail has to removed from offend side or use tool for releasing the spring load
42. What is ring rail starting position?
Answer : 10 mm
43. What is Empty tube length?
Answer :
Lift + 20 mm
Weight = 32 gms
44. By which material the empty tube is made of?
Answer : Polypropylene
45. What is doffing position?
Answer : 10 mm below from the tip of the empty tube
46. What is Chase length?
Answer : Ring dia + 8% to 12 % of ring dia (42 mm)
47. What is short snarl setting?
Answer : 4 to 6 mm (4 mm)
48. What is Under winding setting?
Answer : 5 mm
49. What is the load range required to compensate ring rail load?
Answer :
250 to 280 N for finer counts
300 to 320 N for coarser counts
50. What is the load range required to compensate lappet load?
Answer : 20 to 25 N
51. How roving traverse adjustment done?
Answer :
Pivot topmost – Less traverse
Pivot bottommost – More traverse
52. What is delay drafting setting?
Answer :
- Y4 valve is ON
- Dismantle wheel B
- Adjust operating pressure to 4 bar
- Wheel A must rotate with torque of 40Nm
- Adjust operating pressure to 3.8
- Wheel A must not rotate at 40Nm
- If it rotates
- Remove gear box cover
- KM6 Lock nut in the A wheel shaft inside gear box is tightened till wheel A does not rotate with 40Nm with 3.8 bar
53. How much play to be set for ring rail?
Answer : 0.1mm both longitudinally and laterally
54. What is Lappet position at backward tilting condition?
Answer : 90 degree with respect to roller beam
55. What is ring centering position?
Answer : ½ of empty tube + 40 mm
56. What are the traveler clearer gauges available?
Answer : 1.6mmm, 1.8mm, 2mm & 2.2mm
57. What is thread suction tube setting?
Answer : 0.5 to 1.5 mm
58. C1 and C2 setting procedure?
Answer :
- Fix the motor with basic setting 687/353 mm
- Run the machine with required maximum speed
- Lock the Y26 valve
- M/c should be stopped
- Tin roll coupling should be disengaged (off end side)
- Check C1 , C2 setting which should be equal
- If C1, C2 setting is not equal
- Loosen the motor bet bolt slightly
- Move the motor towards front or back for required setting
- Tolerance allowed is 1 mm
- Tightened the motor bet bolts
- Release the Y26 valve
- Bottom variator should be brought to initial position by rotating the variator manually
- Engage the tin roll coupling
- Run the machine normally
59. What is the frequency for C1 and C2 setting checking?
Answer :
- Once in 3 months
- When belt is changed
- When operating speed is changed
60. What is the Variator belt size?
Answer : 1745 X 62 X 22 mm
61. What are the reasons for changing the variator belt?
Answer :
- If belt size decreases
Normal 1745 X 62 X 22 mm
Decreased 1745 X 59 X 22 mm
- If belt cuts
62. What is the procedure for changing the twist direction?
Answer :
- Jockey pulley top cover to be changed
- In display twist setting to be changed
- Head stock timing belt to be changed for twist direction
- S32 limit switch pressed – ‘S’ Twist
- S32 limit switch not pressed – ‘Z’ Twist
63. What is cots buffing frequency?
Answer : Once in 45 days
64. What is reduction in diameter during cots buffing?
Answer : 0.2 mm
65. What is min dia of cots allowed?
Answer : 28 mm
66. What is drafting roller setting?
Answer :
Top roller – 50/62 mm
Bottom roller – 42.5/60 mm
67. What is the off set in top arm?
Answer :
6.5 mm front offset
1 mm or nil back offset
68. What is Impact of minimum spacer?
Answer :
- Leads to undraft
- Higher breakage
- Bottom apron damages
69. What is Impact of increasing the break draft?
Answer :
Higher thin and thick faults
Better working performance
70. What are types of spacer?
Answer :
Browen -2.5mm
Dark Grey -2.75mm
White -3.0mm
Yellow -3.25mm
Black -3.5mm
Cream -3.75mm
Red -4.0mm
Green -4.5mm
Blue -5.0mm
Grey -5.5mm
71. What is RH % recommended?
Answer : 50 to 55 %
72. What is impact of RH %?
Answer :
- Breakage rate
- Roller lapping tendency
- Higher imperfection
73. what is recommended minimum cots diameter?
Answer : 28.5mm
74. Whats is the diamension top roller cots?
Answer :
- ID – 19mm
- OD – 30mm
- Width -28mm
75. What is recommended shore hardness for cotton?
Answer :
- Front -65 degree
- Middle -80 degree
- Back -83 degree
76. What is oil used in microfog oil lubricator?
Answer : Servo spin 22
77. What is oil used in drafting gear box?
Answer : Servo system 68
78. What is oil used in bijur lubrication apparatus?
Answer : Servo way 220 oil
79. What is oil used in spindle?
Answer : Servo spin EE10
80. What is minimum mechanical speed possible?
Answer : 8500 rpm
81. What is ABS pulley diameter?
Answer : 250 mm
82. What is diamention of spindle tape?
Answer :
2371*11 HS 5
H- Habasit
S- special
5- recommended above 20000 rpm
83. What is spindle tape length in machine?
Answer :
Lift
160 mm -2386 mm
170 mm -2371 mm
180 mm -2356 mm
84. What is top roller grease used?
Answer : Staburags NBN 12/300 Kb
85. What is top roller greasing frequency?
Answer : 30,000 hrs
86. What is top arm load?
Answer :
16 to 18 kgs –front and back
12 to 14 kgs – middle
87. What are lubricants for rings?
Answer : Kluber tex 146 N
88.Top arm off set?
Answer : 6.5 mm front offset
89. What is importance of short snarl?
Answer : Reduce restarting breaks
90. What is importance of long snarl?
Answer : To reduce after doff restarting breaks
91.What is importance of deley drafting?
Answer : To reduce restarting breaks
92. What is empty tube specification?
Answer : Material – PC
93. What is gauge used for empty tube setting?
Answer : Plug gauge
94. What is purpose of traveler clearer setting?
Answer : To avoid fluff loading in traveler
95.What is jockey pulley distance?
Answer : 110 to 130 mm
96.What is minimum suction pressure in the exhaust?
Answer : 5 to 10 mm WC suction
97.What is the purpose of venting in damping cylinder?
Answer : To remove airlock
98.What is the spindle tightening torque?
Answer : 3.5 kgm
99.How many rows creel?
Answer : 6 rows
100.What are the type of separator?
Answer :
- 1.long
- 2.short
101.How many of separator in machine?
Answer :
Long -948
Short -252
102.What is top arm pressure screw tightening torque?
Answer : 12 NM
103 .What are types of bottom roller?
Answer :
Knurling roll
Flutted roll
104.How many bottom rolls in one machine?
Answer :
- Knurling roll
Middle -150 nos
- Flutted roll
Front-150 nos
Back -150 nos
105.What is the flutted width?
Answer : 36 mm
106. What is the Knurling width?
Answer : 33 mm
107.How many bearing in tin roll shaft?
Answer : 51 nos
108.What is torque of split coupling?
Answer : 6.5 kgs
109.What is bearing used in tin roll shaft?
Answer : 45 NPPB
110.What is bearing used in bottom variator shaft?
Answer : SAB 1309 bearing and 22209 E roller bearing
111.What is bearing used in gear end tin roll shaft?
Answer : 1209 K SAB bearing
112.What is bearing used in bottom rollers?
Answer : 3200 Needle bearing
113.What is setting between bottom roll and suction tube?
Answer : 1 mm
114.What is setting between break lining and break disc?
Answer : 0.5 mm
115.What is twist change gear in LR6/S?
Answer : ABCD Wheels
116.How many teeths twist combination?
Answer :
A+B=165 teeth
C+D=137 teeth
117.What is winding length change gear in LR6/S?
Answer : E&F
118.How many teeths winding length combination?
Answer : E+F=113 teeth
119.What is total draft constant?
Answer : 10.519
Total draft = 10.519*H/G Wheels
120.What is break draft constant?
Answer :
67.05
Break draft =67.05/break draft wheel
121.What is the twist constant?
Answer : 25.34
Twist per inch =25.34*D/C*B/A
122.What is running procedure emperor plus rings?
Answer :
Spindle speed — Frequency of traveller changing
- 80% of operation speed or Machine start
- 16000 rpm which ever is less
- do- After 90 mins
- do – ½ hrs before second doff
- Increase by 500 rpm After 24 hrs
- Increase by 500 rpm After 24 hrs
- Increase by 500 rpm After 24 hrs
- Increase by 500 rpm After 24 hrs
Note:-
- Ring cleaning should not be done till the completion of running in
- Increase the speed by 500 rpm every day till the recommended traveller
- Speed is achieved
- After completion running in of rings for achieving optimum traveller life
- Ring cleaning and applying the kluber tex 146 N oil
124.what is setting between tin roll shaft ?
Answer : 4 mm
125. How many motors ?
Answer : 2 nos
126. Give the main motor details?
Answer : 55 kw Three phase AC Indution motor 1440 rpm.
127. Give the fan motor details ?
Answer : 5 kw Three phase AC Induction motor 2880 rpm.
128. Give the details of Main switch ?
Answer : 250 A Circuit Breaker. Make: Merlingerin. type: NS250N.
129.If there is any safty & over load tripping for main motors and others ?
Answer :
- E1- electronic O/L relay for incoming line.
- F1,F2,F3,F5-mcb’s for control supply.
- Q2,Q5- Circuit Breakers for Fan motor & OHTC .
- F4- Thermister protection Unit for Main & fan Motors.
130. How many Push buttons ?
Answer :
- S11- machine ON Button Green.
- S12-Off Push Button Red.
- S13- Blue push button –Manual doff.
- S14 – Yellow push button-filter Cleaning
- S15,S15a- Emergency off.
131.How many Limit switches ?
Answer :
- S20 – Door limit switch
- S21 – Twist Change limit switch
- S22- long snarl piston up ,ring rail down.
- S23-Long snarl middle position
- S24- long snarl piston down, ring rail up.
- S32-Open gear clutch.
132. How many pressure limit switches ?
Answer :
B52- system pressur switch-0.5 to 10 bar.
B53-Drafting pressure switch-0.2 to 3.6 bar
B54- Differential pressure switch.
133.what are the proximity switches in LR6s?
Answer :
- B1-Delivery
- B2 –spindle speed.
- B25- Motor reset.
- B26- Motor reset.
- B33- Motor reset
- B34-Thread guide Tilting.
- B37- Thread guide Tilting RHS
- B38- Thread guide Tilting LHS
- B40-Under Winding.
134. How many signal lamps ?
Answer : H1,H1A – 2 nos
135. How many Electro valves ?
Answer : 15 nos.
136. What are the Electro valves used for Auto Doffing ?
Answer :
- Y1- Long Snarl removal
- Y2-Short Snarl removal
- Y3- Drop toggle lever.
- Y4- Delayed Drafting.
- Y4a- lappet down.
- Y4c-Lappet tilting.
- Y7-Open gear clutch.
- Y8-Lift thread Guides
- Y20-Operating load of Drafting system.
137. What are the other Electro valves ?
Answer :
- Y9- Lubrication HS
- Y9a- Lubrication TS
- Y21- Brake
- Y25-Variator Forward.
- Y26- Variator Reverse.
- Y27-Waste Evacution.
(3157)
Latest posts by Dhinesh K (see all)
- Ring Spinning Machine Specification and Question Answer - May 4, 2020
