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than by building a mechanical dobby chain. This allows the weaver to load and switch weave drafts in seconds without even getting up from the loom. In addition, the design process performed on the computer provides the weaver with a more intuitive way to design fabric; seeing the pattern on a computer screen is easier than trying to visualize it by looking at the dobby chain.
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floor looms have only ten to twelve treadles due to space limitations. This limits the weaver to ten to twelve distinct sheds. It is possible to use both feet to get more sheds, but this is rarely done in practice. It is even possible to change tie-ups in the middle of weaving a cloth but this is a tedious process, so this too is rarely done.
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a mistake can ruin the cloth being woven. On a manual dobby the sequence that makes up the pattern is represented by the chain of dobby bars. The length of the sequence is limited by the length of the dobby chain. This can easily be several hundred dobby bars, although an average dobby chain will have approximately fifty bars.
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Another advantage to a dobby loom is the ability to handle much longer sequences in the pattern. A weaver working on a treadled loom must remember the entire sequence of treadlings that make up the pattern, and must keep track of where they are in the sequence at all times. Getting lost or making
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On treadle operated looms, the number of sheds is limited by the number of treadles available. An eight-shaft loom can create 254 different sheds. There are actually 256 possibilities which is 2 to the eighth power, but having all threads up or all threads down is not very useful. Most eight-shaft
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A computer-controlled dobby loom takes this one step further by replacing the mechanical dobby chain with computer-controlled shaft selection. In addition to being able to handle sequences that are virtually unlimited, the construction of the shaft sequences is done on the computer screen rather
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With a dobby loom, all 254 possibilities are available at any time. This vastly increases the number of cloth designs available to the weaver. The advantage of a dobby loom becomes even more pronounced on looms with 12 shafts (4094 possible sheds), 16 shafts (65,534 possible sheds), or more. It
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On a treadle loom, each foot-operated treadle is connected by a linkage called a tie-up to one or more shafts. More than one treadle can operate a single shaft. The tie-up consists of cords or similar mechanical linkages tying the treadles to the lams that actually lift or lower the shaft.
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or other electric devices to select the shafts. Activation of these solenoids is under the control of a computer program. In either case the selected shafts are raised or lowered by either leg power on a dobby pedal or electric or other power sources.
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Dobby-loom control mechanism. The pegs driven into the bars (hung in a loop on the left) each lift one "treadle" in a pre-determined pattern, like lifting the teeth of a
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Dobby looms expand a weaver's capabilities and remove some of the tedious work involved in designing and producing fabric. Many newer cloth design techniques such as
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A manual dobby uses a chain of bars or lags each of which has pegs inserted to select the shafts to be moved. A computer-assisted dobby loom uses a set of
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of "draw boy," which refers to the weaver's helpers who used to control the warp thread by pulling on draw threads. A dobby loom is an alternative to a
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182:. Both are floor looms in which every warp thread on the loom is attached to a single shaft using a device called a
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but are limited in comparison to
Jacquard looms. Dobby looms first appeared around 1843, roughly 40 years after
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that can be mounted atop a loom to lift the individual heddles and warp threads.
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Floor loom with a dobby mechanism for weaving geometric patterns
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loom in which each thread is individually controlled.
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Tappet and Dobby Looms Their
Mechanism and Management
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can only reach their full potential on a dobby loom.
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Dobbies can produce more complex fabric designs than
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49:. Unsourced material may be challenged and removed.
226:The successor punched-card control mechanism of a
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109:Learn how and when to remove this message
125:A loom from the 1890s with a dobby head.
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206:. Hooghly District, West Bengal, 2019
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47:adding citations to reliable sources
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300:- the cloth made on a dobby loom.
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214:Steam-powered 1894 dobby loom,
34:needs additional citations for
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800:Thomas Ferguson & Co Ltd
344:. Manchester: Emmett and Co.
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340:Roberts, Thomas (1920).
148:using a device called a
840:Brigitta Scherzenfeldt
264:reaches its peak on a
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141:that controls all the
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860:Margaretha Zetterberg
546:Barber-Colman knotter
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161:Joseph Marie Jacquard
137:, is a type of floor
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869:Employment practices
830:Margaretha Reichardt
820:Maria Elisabet Öberg
785:Micheline Beauchemin
539:Tools and techniques
43:improve this article
881:Kissing the shuttle
754:Warp-weighted loom
320:Piece Goods Manual
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907:Queen Street Mill
805:Elisabeth Forsell
325:Project Gutenberg
216:Queen Street Mill
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60: –
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54:Find sources:
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32:This article
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21:
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850:Gunta Stölzl
835:John Rylands
815:Ethel Mairet
749:Roberts loom
708:
699:Air-jet loom
435:Double weave
359:
356:"Dobby loom"
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180:treadle loom
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157:tappet looms
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58:"Dobby loom"
53:
41:Please help
36:verification
33:
825:Lilly Reich
780:Otti Berger
775:Anni Albers
744:Rapier loom
475:Plain weave
415:Basketweave
135:dobbie loom
876:More looms
739:Power loom
709:Dobby loom
704:Dandy loom
513:Components
465:Pile weave
455:Leno weave
440:Even-weave
305:References
176:corruption
131:dobby loom
69:newspapers
795:Ada Dietz
689:Types of
445:Gabardine
244:solenoids
204:music box
170:The word
99:June 2007
922:Category
658:Tapestry
606:Pibiones
520:Textiles
425:Coverlet
292:See also
276:Computer
266:Jacquard
238:, India.
232:Varanasi
763:Weavers
626:Shuttle
420:Charvet
401:Weaving
194:Control
146:threads
83:scholar
770:Acesas
673:Wicker
668:Wattle
663:Temple
653:Tāniko
631:Sizing
591:Kasuri
576:Heddle
551:Beamer
490:Swivel
460:Oxford
450:Lampas
408:Weaves
251:Manual
218:Museum
184:heddle
85:
78:
71:
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56:
895:Mills
691:looms
678:Resin
648:Talim
556:Braid
495:Twill
480:Satin
470:Piqué
430:Dobby
188:sheds
174:is a
172:dobby
150:dobby
133:, or
90:JSTOR
76:books
621:Shed
611:Reed
596:Loom
581:Ikat
530:Yarn
485:Shot
143:warp
139:loom
62:news
323:at
45:by
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358:.
332:^
234:,
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129:A
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87:·
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