Article define process for selection of Spinning Rings & Ring Travellers.

1. Rings & Ring Travellers 2013
Produced By Mr. Sunil Kumar Sharma, Dy. General Manager – QA, PPC & Customer Care,
Published in Spinning Textiles Magazine, Vol-8, Issue-3, May-June 2014
Page 1
Question – 1 : - What are the factors to be considered while selecting Ring flange
and Ring diameter in Spinning ?
Ans. : Ring Flange : The selection of ring flange is mainly depend upon the yarn
diameter to be produced. According to yarn diameter ring traveller will be selected. For
coarse count where yarn diameter is more, widen bow, bigger size & heavy weight ring
traveller will require. For perfect ring raceway bigger size heavy traveller also requires
strong and widen ring flange to get the proper twisting operation and maximum ring &
ring traveller life. Hence for coarse count range usually two flange ring being used i.e.
4.0 to 4.2 mm flange width i.e. for below 20s NE. Ref. fig.-1
While for finer count range where yarn diameter is low light weight & lower bow size
traveller being used to get the maximum traveller speed and higher twisting with low
end breaks rate. Hence finer & middle count range single flange rings are recommended
i.e. 3.0 to 3.2 mm flange width. Ref. fig.-1
Fig. 1 : Recommended Ring Flange, Ring diameter according to counts pattern & traveller speed.
Source : - World of performance, Bracker.

2. Rings & Ring Travellers 2013
Produced By Mr. Sunil Kumar Sharma, Dy. General Manager – QA, PPC & Customer Care,
Published in Spinning Textiles Magazine, Vol-8, Issue-3, May-June 2014
Page 2
Ring Diameter : - Selection of ring diameter for spinning is depends on following
factors : -
1. Spindle - Spindle gauge : - The first important point to be consider for selecting
the ring diameter is spinning frame spindle to spindle gauge. The ring diameter
can be chosen 25 mm smaller at a maximum with regard to the spindle gauge.
Which is requires for necessary freedom of balloon movement, inserting the
traveller, repairing end breakages and exchanging the cop with fewer obstacles.
Ring dia = t – 25 mm, where t = Spindle to Spindle gauge.
Fig.2 : Graphical representation of Spinning geometry w.r.t. Rings & Spindles.
2. Tube diameter : - The ring diameter (D) should be in between 1.8 to 2.1 times of
top of spinning tubes (d). If the value d:D is too small a high traveller strain
occurs, causes the high traveller wear and end breakages will increases. If the

3. Rings & Ring Travellers 2013
Produced By Mr. Sunil Kumar Sharma, Dy. General Manager – QA, PPC & Customer Care,
Published in Spinning Textiles Magazine, Vol-8, Issue-3, May-June 2014
Page 3
value d:D is too large, it will results in disturbance of the yarn balloon and
increased yarn hairiness and end breakages.
3. Tube length : - The ring diameter (D) should be maximum 1/5th
of the spinning
tube length (H). If a too long bobbin or spindle is chosen (e.g. H = 5.5 x D), the
yarn balloon will contact the tip of the bobbin. Besides increased end breakages a
worse yarn quality will be produced.
4. Balloon control ring : - The balloon control ring should be 2 – 3 mm larger than
the ring diameter. If the balloon control ring is too big, it will not fulfill its job of
the releasing the yarn balloon.
5.Yarn Count & twist rate : - The spinning geometry is determined by the yarn
count and twist rate. Coarser count & low twist yarn run with lower delivery rate,
followed with lower spindle speed, hence large ring diameter, 2 flange rings with
long spinning tube is suitable for it. While fine counts & high twist yarn produces at
high delivery rate & spindle speed followed with high traveller speed, which can be
obtained only at small size ring diameter, single flange & with short tube length. If
you selected a higher ring diameter against recommended ring diameter for a
particular count, then to get the desire production level your traveller speed will be
very high at same spindle speed and resultant end breaks rate & yarn hairiness will
be very high, which ultimately causes the reduction in production with worse quality
yarn. Hence to get the desire production rate with quality an optimum ring diameter
to be selected for a particular count range. Fig.1, demonstrate the selection of ring
diameter according to count pattern & traveller speed. Table .1 : Shows the spinning
data w.r.t. spinning geometry.
Table .1 : - Spinning data independence on the spinning geometry.
Sr. No. Description

4. Rings & Ring Travellers 2013
Produced By Mr. Sunil Kumar Sharma, Dy. General Manager – QA, PPC & Customer Care,
Published in Spinning Textiles Magazine, Vol-8, Issue-3, May-June 2014
Page 4
1 Count (Ne) 30sCH 30sCH 30sCH 30sCH
2 Twist per inch 19.5 20.5 21.5 22.5
3 Ring Diameter (mm) 38 42 45 50
4 Bobbin Length 180 210 230 250
5 Spindle Speed (RPM) 20000 17500 16000 13500
6 Traveller Speed (m/s) 39.8 38.5 37.7 35.3
7 Delivery Speed (M/Min.) 26 22.8 20.8 17.6
8 Cop weight (Gms.) 45 65 85 125
Conclusion : - The selection of Ring flange is mainly depend upon the yarn diameter or
yarn count. 2 flange rings to be selected for count range below 20sNE for heavy and
bigger size traveller raceway, while single flange rings to be selected for count range
above 20sNE for getting higher productivity, better Quality and ring & traveller life.
Following factors to be taken into consideration at the time of selecting ring diameter : -
1. Ring diameter can be chosen 25 mm smaller at a maximum with regard to the spindle
to spindle gauge.
2. Ring diameter should be 1.8 to 2.1 times with top of spinning tube diameter.
3. Ring diameter should be 1/5th
of the spinning tube length.
4. Ring diameter should be 2 – 3 mm less as compared to balloon control ring.
5. Finally count pattern & require traveller speed to be considered for selecting Ring
diameter. Following table - 2 may be helpful for selecting the ring diameter according
to expected traveller speed & count range : -
Table -2 : Recommended Ring diameter according to count range & traveller speed.
Ring Diameter
(mm)
Expected Maximum Traveller Speed
(m/s)
Suitable Count Range (Ne)
51 / 48 mm 25 to 32 6s to 20s
45 / 42 mm 30 to 40 16s to 40s
40 / 38 mm 35 to 42 24s to 80s
36 mm 30 to 42 70s & above
Question – 2 : How Ring travellers affect the yarn Quality & downstream processes?

5. Rings & Ring Travellers 2013
Produced By Mr. Sunil Kumar Sharma, Dy. General Manager – QA, PPC & Customer Care,
Published in Spinning Textiles Magazine, Vol-8, Issue-3, May-June 2014
Page 5
Ans. : A ring traveller plays very important role in ring spinning system. It is
not only important for yarn production while it is also important for yarn Quality.
Following Quality parameters directly affects with ring traveller : -
1. Yarn Hairiness : - Yarn hairiness is directly influenced by ring traveller.
Following are the reasons to increase yarn hairiness due to ring traveller : -
a. Low bow Ring traveller causes high hairiness; hence to reduce the yarn
hairiness higher bow height travellers should be selected.
b. Lighter weight ring traveller : - Usually to get the higher spindle speeds
spinners selects lighter weight ring traveller which causes high hairiness,
hence to overcome the hairiness problem in yarn heavier ring travellers to
be selected.
c. Burn out Ring traveller : - Burn out ring traveller also causes hairiness
problem, hence traveller changing schedule should be followed strictly
and exact cause of ring traveller burn out to be analyzed and rectified.
2. Neppy yarn : - Problem of neppy yarn observed with burn out ring travellers,
which may be overcome by either replacing the defective rings or by reducing
the ring traveller life.
3. Low Elongation : - Heavier ring traveller causes low yarn elongation, which
may be avoided by selecting right weight ring traveller.
4. Higher breaks in downstream processes : - Lighter weight ring traveller allow
to pass weak yarn to next processes where it occurs breaks and causes low
efficiency, hence for a good quality yarn, weight of ring traveller to be selected
in such a manner where weak yarn should break at ring frame stage itself. Burn
out travellers also causes thin & weak places in yarn.
5. Higher classimat faults & Winding cuts : - High hairiness, neppy yarn, low
elongation, weak yarn, higher end breaks either due to defective ring traveller or
due to wrong selection of ring travellers resultant into higher classimat faults &

6. Rings & Ring Travellers 2013
Produced By Mr. Sunil Kumar Sharma, Dy. General Manager – QA, PPC & Customer Care,
Published in Spinning Textiles Magazine, Vol-8, Issue-3, May-June 2014
Page 6
winding cuts which again increases yarn joints and ultimately lowering the
production efficiency in downstream processes with poor quality.
Question – 3 : How to decide the life of ring traveller ?
Ans. : The life cycle of ring traveller is important to keep the sustainable
performance of ring spinning section and Quality of yarn. Following points influence
on ring traveller life : -
Kind of yarn (Cotton, Manmade fibre etc.)
Yarn Count ( coarse – fine)
Spindle Speed (RPM) & its variation.
Surface condition of ring.
Spinning settings i.e. lift, ABC ring & Lappet hook setting & clearance gauge etc.)
Atmospheric condition (i.e. Humidity & Temperature).
To decide the life of ring traveller control study should be conducted with following
parameters : -
Check the traveller fly out % on daily basis.
Check the Ring frame breaks rate on daily basis.
Check the yarn Quality parameters such as Yarn Hairiness, Elongation % &
Elongation CV %, Yarn imperfection specially Neps on daily basis.
Check physical condition of some ring travellers randomly selected (such as
1%) for burn travellers.
These all parameters should be drawn in a control chart day wise and whenever
there is any adverse deviation observed in trend that is to be marked. Study should
be repeated at-least three times in different – different counts. Life of travellers
should be selected just before two days from where trend of control chart deviated.
Question – 4 : How to judge the burning of ring traveller ?

7. Rings & Ring Travellers 2013
Produced By Mr. Sunil Kumar Sharma, Dy. General Manager – QA, PPC & Customer Care,
Published in Spinning Textiles Magazine, Vol-8, Issue-3, May-June 2014
Page 7
Ans. : The burning degree of traveller is classified by the discoloration of
traveller foot part, which is caused by the friction heat. The following table gives the
“burning degree” prepared from the burning colour : -
Table – 3 : Traveller Discoloration & temperature at different stages of traveller burning.
Burning Temperature
Burning
Degree
Colour Traveller
discoloration
temperature
Experiment
value at
traveller
0 No discoloration 1500
C 1500
C
1 Almost no discoloration 1700
C 1900
C
2 Slightly Yellow 2200
C 2550
C
3 Yellow or Gold 2250
C 2550
C
4 Red Brown 2450
C 2850
C
5 Reddish purple 2650
C 3100
C
6 Purple 2800
C 3350
C
7 Blue 3000
C 3600
C
8 Bright blue 3250
C 3800
C
Source : Kanai Traveller standards.
It will need considerable experience to classify the traveller burning into 9 degree as
above. Therefore the burning degree is expressed by the ratio (%) of burned travellers
to the total number of travellers. The burned traveller means the traveller with
burning degree of 6 and more.
Conclusion : - A small ring traveller is very important part of spinning mills, which
may impact huge on yarn Quality & productivity of spinning mills as well as in
downstream processes, hence it cannot be treated as a ignorant part and proper care to
be taken while selecting ring traveller and ring traveller life. Scientific methods as
explain above to be adopted to decide the ring traveller life. Judging of traveller
burning is a considerable experience work and it may be judge by the discoloration of
foot part of traveller.
Produced by : Mr. Sunil Kumar Sharma,
Dy. General Manager – QA, PPC – Customer Care

8. Rings & Ring Travellers 2013
Produced By Mr. Sunil Kumar Sharma, Dy. General Manager – QA, PPC & Customer Care,
Published in Spinning Textiles Magazine, Vol-8, Issue-3, May-June 2014
Page 8
Mobile No. : – 09552596742, 09921417107
E_mail : - sunil_ku67@yahoo.com
Loknayak Jayprakash Narayan Shetkari Sahakari Soot Girni Ltd.
Kamalnagar, Untawad – Hol, Shahada,
Tal. : - Shahada, Dist. : - Nandurbar (MS)
Pin : - 425409