Weaving; a practical guide to the mechanical construction, operation, and care of weaving machinery, and all details of the mechanical processes involved in weaving . imperfectsource; and it is well known that if the harnesses are working dis-proportionately, poor results will ensue. Unequal shedding is thecause of endless trouble both to fixer and weaver, and the clothresulting therefrom is not fit for sale as firsts. The greater careshould be taken, not only in the construction of the cam, but in thefitting of the cam to the requirements of the cloth to be woven. Onsome cloths very little dw
Weaving; a practical guide to the mechanical construction, operation, and care of weaving machinery, and all details of the mechanical processes involved in weaving . imperfectsource; and it is well known that if the harnesses are working dis-proportionately, poor results will ensue. Unequal shedding is thecause of endless trouble both to fixer and weaver, and the clothresulting therefrom is not fit for sale as firsts. The greater careshould be taken, not only in the construction of the cam, but in thefitting of the cam to the requirements of the cloth to be woven. Onsome cloths very little dwell of the harnesses is necessary; simplyhave the shed well opened a sufficient length of time to allow theshuttle to pass wholly through. A very short dwell of the harness Fig. 52. Sectional Pick Cam. 93 86 WEAVING. is better for the yarn, as there is less actual strain upon it when theshed is opened gradually than when it is suddenly opened. The term dwell means the effect of that portion of the camwhich keeps the harness at rest for a certain part of one revolutionof the crank shaft, and during a portion of which time the shuttle ispassing through the Fig. 53. Opeu Front of Loom Sliowiiig all Motions Connected. Although the shedding motion is the first principal movement,it must be so constructed that it will conform to, and be on timewith the second principal movement, picking. Hence the reason for acertain amount of the revolution of the crank shaft being spokenof as a dwell of the harness. The shedding motion is the first of the three principal move-ments in weaving. The parts of the motion for the plain loom areshown in the diagram at Fig. 54, and are as follows: A Shedding Cams B Treadles B Treadle Pin C Treadle Bowl D Bottom Harness Straps D Top Harness Straps E Harness Eoller and Set Collars F Lambs or Harness Jacks G Back Harness H Front Harness 94 WEAVING. 87 The shedding cams are fixed in such a position on the cam shaftthat they will, when in motion, operat
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishe, booksubjectweaving
