This document summarizes a student's industrial training project on autodoffing processes at a textile company. The student studied the autodoffing system of ring frame machines, which automatically replaces full bobbins with empty ones using a robot called a robodoff. The student collected data on manual versus automatic doffing times, identified issues like worn grippers that caused faults, and proposed solutions to reduce doffing time and increase production. Calculations showed the proposed autodoffing process could save over 3 hours of production time per shift across all machines.

1. PROJECT REPORT ON INDUSTRIAL
TRAINING
AT VARDHMAN YARNS
MANDIDEEP
Under guidance of :-
Mr. Dinesh Chinnapan
Maintenance Executive
Unit-5
Presented by :-
Bhagat Ram
7th semester

2. JAWAHAR LAL NEHRU GOVT. ENGG.
COLLEGE
SUNDERNAGAR (H.P.)
Bachelor of Technology
4th Year Textile Engineering

3. DEDICATE TO
My father
Mr. Jamna Dass
My mother
Mrs. Sarswati
My brother
Mr. Keshav Sehgal
To my family members and teachers

4. ACKNOWLEDGEMENT
 I would like to thank Mr. Praveen Dhingra (G.M. O Vardhman
Yarn) Mr. Col. B.K. Sharma (Chief Manager H.R. & Adm.)
and Mrs. Pooja Jain (Astt. H.R.)who gave me this opportunity
to learn in this prestigious organization.
 I would also thank Mr. Somnath Gupta (Production Chief
manager Unit 5), Mr. Dinesh Chinnappan (Maintenance
Executive) and Mr. Shushank (Production Officer) for guiding
me .
 I would also thank Shift officers of Unit 5 who helped a lot
while my training period .
 And I also like to thank all the operators who helped me during
my training
 And lastly all my friends who were with me during my training
period.

5. PROJECT GIVEN
 To study the Autodoffing of Ring frame

6. •Machine and its parameters.
•What is Autodoffing.
•Difference between manual and automatic doffing.
•Time taken
•Observation and calculations
CONTENTS

7. COST CONSUMPTION

8. OBJECT OF STUDY
o To reduce the stoppage
time of machine.
o Which directly increases
the efficiency of
machine.
o To increase the
production.

9. RING FRAME MACHINE

10. Machine : Ring Frame
Model : G32
 Maker : Rieter
 Count : 30 Ne KW, 32 Ne KH, 30 Ne KH
 Feed hank :0.72 Ne,0.85 Ne,0.83 Ne
C.P. : 35,43,41
T.M. : 4.4,4,4
T.P.M. : 949,862,891
BDCP : 62
B.D. : 1.14
 Traveler : 3/0 C1MMUDR,4/0 C1MMUDR
 Spacer : 4mm
PARAMETERS OF THE MACHINE

11. What is
Auto
Doffing ???

12. DOFFING

13. AUTODOFFING
It is process of replacing fully
doffed bobbins with the empty
ones with the help of additional
arrangement that we called
ROBODOFF.ROBODOFF

14. MANUAL DOFFING
It is process of replacing fully doffed
cops with the empty bobbins.
This is done by manually.

15. DISADVANTAGES OF MANUAL
DOFFING
1. More time consumption.
2. Laborious work.
3. Less production .
4. More labour cost.
5. More proir to fault.

16. AUTODOFFING
 It is also the process of removing fully
doffed bobbin with empty ones.
 The main difference is that the doffing is
done automatically

17. ADVANTAGES OF AUTO DOFFING
 Less time consumption.
 More production.
 Less laborious process.

18. PARTS OF ROBODOFF :
Doffer Shaft

19. CONTINUES………
Scissor Arm Servo belt

20. CURRENT DOFFING PROCESS

21. TIME CONSUMPTION WITHOUT
FAULT
222 220 225
239
222 221 224.8333333
0
50
100
150
200
250
300
24.7.1325.7.1426.7.1529.7.1630.7.1731.7.18 Avg.
Total time
Scissor inclined time
Scissor return time
Seconds
Date

22. TIME CONSUMPTION WITH FAULT
264
243
223
264
248
221
243.8333333
0
50
100
150
200
250
300
Total time
Scissor inclined time
Scissor return time
Seconds

23. OBSTACLES TO GOAL
Faults which are coming
1.Gripper worn out
2.Tubes are not fully loaded
75%
25%
Gripper worn out
Tubes are not
loaded

24. OCCURRENCE OF FAULT
7
8
9
12
6
8 8.333333333
1 1
0
2
0 0
0.666666667
0
2
4
6
8
10
12
14
24.7.13 25.7.13 26.7.13 29.7.13 30.7.13 31.7.13 Avg.
total m/c
fault came
Totalnoofmachines
Date

25. SENSORS
B150
B151
B152
F111
F113
F110
F112
B700
B703

26. SOLUTION AND COUNTER
MEASURES

27. PROPOSED DOFFING PROCESS

28. TIME SAVING
Avg. time =
42.8403 sec

29. TIME SAVING CONTINUES……
Avg. time=
22.0677 sec

30. Average total time :224.833
sec
No. of machines in unit -5 :
26
So total stoppage time –
26*224.833sec= 5845.658
sec=97.42
minutes=1.1623hours
In one shift
=1.1623*8=12.99035 hours
OBSERVATIONS AND CALCULATIONS

31. OBSERVATIONS AND CALCULATIONS…..
Time taken by Robodoff to go up
=42.8403 sec
Time taken by Robodoff to come
down =22.0677 sec
New doffing time=224.833-
(42.8403+22.0677)= 159.0925
sec
Total machines in unit 5=26
26*65.57405=1704.9253sec=28.41
minutes
In one shift =28.41*8=227.32
minutes =
Time save=65.57405
sec
3.788
hours

32. CONCLUSION
 We can reduce doffing time by proper scissor arm
motion
 By starting the Robodoff when it is in inclined
position
 By starting the machine when Robodoff is
coming back