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Page 29 - Shawl Weaving Artisan - TP
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    Textile & Handloom                                                                Exercise 1.2.14
                Shawl Weaving Artisan - Winding and Warping

                Yarn winding for warp making process (pre warping activity)

                Objectives : At the end of this exercise you shall be able to
                •  calculate the minimum amount of yarn required for making the warp for weaving.

                  Requirements

                   Tools/Equipment’s/Instruments                      Materials
                   •  Empty double flanged bobbin   - 1 No.           •  Yarn samples:wool                  - as reqd.
                   •  Yarn winding machine             - 1 No.

                PROCEDURE

                TASK 1: Calculate the minimum amount of yarn (in kilograms) required for making the warp for weaving
                •  Warp ends                                          Yarn length per kg = Yarn Count × 840 × 0.9144

                   Each vertical thread in the fabric is called an “end.”  (This converts yards per pound to meters per kg for
                •  EPI (Ends Per Inch)                                cotton yarn count Ne)
                                                                      Example
                   This means how many warp threads are present in
                   one inch of fabric width.                          Given

                •  Fabric width                                       •  Fabric Width = 40 inches
                   The width of the fabric you want to weave (in inches).  •  EPI = 50
                •  Warp length                                        •  Warp Length = 500 meters
                   The total  length of  warp you want to  prepare (in   •  Yarn Count = 40s Ne (cotton count)
                   meters).
                                                                      Step 1: Calculate Total Ends:
                •  Yarn count                                                       50×40=2000 ends
                   The thickness of the yarn (example: 30s Ne, 40s Ne,   Step 2: Calculate Yarn Length per kg:
                   etc.).
                                                                      For 40s Ne cotton yarn:
                Formula
                                                                      40×840=33,600 yards per pound
                Step 1
                                                                      Converting yards to meters:
                First, calculate the total number of ends
                                                                      33,600×0.9144=30,700 meters per kg (approx)
                Total Ends = EPI × Fabric Width (inches)
                                                                      Step 3: Calculate Total Yarn Weight:
                Step 2
                                                                      2000×500 / 30700 ≈ 32.6 kg.
                Now, calculate minimum yarn weight (in kg)
                                                                      Need about 33 kg of yarn for this warp.
                                   Total    Ends  × Warp   Length   (meters)
                Warp  Weight    (kg    )
                                   Yarn   length   per   kg   (meters    per   kg )

                TASK 2: Calculate total warp required

                                    Total  Yarn  Weight    (kg)       Example: If total yarn weight is 50 kg and you wind it
                Winding  Weight    (kg)                               into 10 packages, each package weighs 50/10 = 5 kg.
                                     Number    of   Packages

                                                                                                                    17

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