Group I gives a list of loom motions and Group II contains loom systems. Match the motion from Group I with the corresponding system from Group II.Group I Group II P. Shedding 1. Matched cam Q. Picking 2. Seven wheel R. Beat-up 3. Rapier S. Take-up 4.Jacquard
Loom Motions and Systems Matching
This question requires matching specific textile loom motions from Group I with their corresponding loom systems from Group II.
Matching Analysis
- P. Shedding is the process of creating a shed (opening) for the weft yarn. The Jacquard system (4) is a highly versatile mechanism used for complex shedding patterns. Thus, P matches with 4.
- Q. Picking is the insertion of the weft yarn through the shed. The Rapier system (3) is a well-known method for weft insertion. Thus, Q matches with 3.
- R. Beat-up is the action of pushing the newly inserted weft yarn into the fabric fell. A Matched cam (1) mechanism can be used to drive the reed for this action. Thus, R matches with 1.
- S. Take-up refers to the mechanism that winds the woven fabric onto the cloth roller. The Seven wheel (2) mechanism is associated with controlling the fabric take-up rate. Thus, S matches with 2.
Conclusion
Based on the analysis, the correct matching is:
- Shedding (P) - Jacquard (4)
- Picking (Q) - Rapier (3)
- Beat-up (R) - Matched cam (1)
- Take-up (S) - Seven wheel (2)
This corresponds to option P-4, Q-3, R-1, S-2.
Important Questions from FABR Loom Mechanisms Shedding
- Group I lists the components of the weaving machine and Group II lists their functions. Match the component with its function.
Group I Group II P Conjugate/matched cams 1 Driving the cloth roller with slip
driveQ Worm and worm wheel 2 Continuous positive take up
motionR Friction clutch device 3 Motion of sley in rapier loom S Lease rod 4 Separation of the warp sheet
forming the shed Amongst the following, the correct condition(s) that will reduce bumping during weaving is/are
- Group I lists weaving machine related parameters and Group II contains the shortcomings of these parameters. Match the machine related parameter with its shortcoming.
Group I Group II P. Variable heald staggering 1. Not favourable for heavy fabric Q. High eccentricity ratio 2. Reduction in shed height R. Fixed heald staggering 3. Reduction of sley dwell S. Late shedding 4. Higher vibration in weaving machine Determine the correctness or otherwise of the following Assertion [a] and Reason [r]
Assertion: In shuttle loom, late shedding is preferred for filament weaving.
Reason: In late shedding, the timing of shed dwell matches with the timing of shuttle travel through the shed, and therefore, it minimises the rubbing of warp yarns.
For a shuttle loom, producing plain woven fabric, if each of the dwell periods of the shedding cam corresponds to one-third of crank shaft rotation, the sum of the two dwell periods of the cam (in degree) is_____.
