Weaving Mechanisms

<p>500 rpm (C)</p> Signup and view all the answers

<p>It can operate at much higher speeds. (A)</p> Signup and view all the answers

<p>They are linked to the knives and assist in movement. (D)</p> Signup and view all the answers

<p>Heald frames and rigidly attached knives. (B)</p> Signup and view all the answers

<p>Spool bars (A)</p> Signup and view all the answers

<p>3600 (C)</p> Signup and view all the answers

<p>3 (B)</p> Signup and view all the answers

<p>600 (C)</p> Signup and view all the answers

<p>Total ends / Utilized jacquard capacity (A)</p> Signup and view all the answers

<p>2.66 (D)</p> Signup and view all the answers

<p>2.5&quot; (D)</p> Signup and view all the answers

<p>5&quot; (B)</p> Signup and view all the answers

<p>It is equal to the harness density. (A)</p> Signup and view all the answers

<p>Mechanical and Electronic (B)</p> Signup and view all the answers

<p>Punched Card (A)</p> Signup and view all the answers

<p>They require electric components for selection (B)</p> Signup and view all the answers

<p>It takes up less space and is stronger (D)</p> Signup and view all the answers

<p>One (C)</p> Signup and view all the answers

<p>Solenoid (B)</p> Signup and view all the answers

<p>They have one cylinder for odd picks and one for even picks (D)</p> Signup and view all the answers

<p>A basic jacquard mechanism involving only one lift (A)</p> Signup and view all the answers

<p>0.70 (B)</p> Signup and view all the answers

<p>420 (A)</p> Signup and view all the answers

<p>Double lift jacquard (D)</p> Signup and view all the answers

<p>Lower needle accommodation (D)</p> Signup and view all the answers

<p>600 (A)</p> Signup and view all the answers

<p>Pitch (A)</p> Signup and view all the answers

<p>180 (B)</p> Signup and view all the answers

<p>Lift (B)</p> Signup and view all the answers

<p>The hook will remain lifted as it has a hole to fit into. (A)</p> Signup and view all the answers

<p>To select whether a particular hook is lifted or not. (C)</p> Signup and view all the answers

<p>It allows for more intricate woven designs without a physical medium. (C)</p> Signup and view all the answers

<p>The weight of the harness itself. (C)</p> Signup and view all the answers

<p>1983 (A)</p> Signup and view all the answers

<p>To act as a locking mechanism for lifted hooks. (A)</p> Signup and view all the answers

<p>Through floppy disks, USBs, or network transfers. (D)</p> Signup and view all the answers

<p>The supplementary hook will disengage from the fixed griffe. (D)</p> Signup and view all the answers

<p>The heald frame will remain down. (D)</p> Signup and view all the answers

<p>The heald frame will be up. (A)</p> Signup and view all the answers

<p>The heald frame will be lowered. (B)</p> Signup and view all the answers

<p>The heald frame will remain up on both picks. (C)</p> Signup and view all the answers

<p>The heald frame will be down. (B)</p> Signup and view all the answers

<p>Only knife K1 catches hook H1. (B)</p> Signup and view all the answers

<p>The heald frame will be raised if F1 has a peg. (B)</p> Signup and view all the answers

<p>Both feelers lack pegs. (C)</p> Signup and view all the answers

When neither feeler (F1 nor F2) has a peg, the heald frame stays down on consecutive picks.

A peg for feeler F1 lifts the heald frame on the first pick but the heald frame stays down on the second because F2 has no peg.

When F1 has no peg, the frame is down on the first pick, and then F2 lifts it up on the second pick

When both feelers have pegs, the heald frame stays up on consecutive picks.

A mechanism in weaving that controls the warp threads.

Components that detect presence of peg and influence movement of heald frame.

These move according to the position of feelers and hooks to alter heald frame position.

Components that interact with knives to move heald frame.

A type of dobby mechanism that uses reciprocating knives and a positive double lift principle for weave selection. It's very similar to Keighly dobbies, but without return springs.

Moving blades used in Hattersley dobbies to lift and lower warp threads during weaving.

Describes the operation of a dobby in which the knife system precisely controls the lift of the warp threads, ensuring the correct weave pattern.

Next-generation dobby mechanism that runs at higher speeds (1000-1500 rpm) compared to reciprocating dobbies (500 rpm).

The process of precisely lifting and lowering warp threads in a loom to create a specific pattern in the fabric.

A mechanical device in a weaving loom that controls the complex operation of lifting warp threads, creating the desired weave patterns.

The rate at which a weaving loom operates, measured in revolutions per minute (rpm).

Machine used for preparing woven patterns by punching patterns onto paper.

The maximum number of warp threads a jacquard machine can control in one repeat.

The number of warp threads that are woven in a single repeating pattern of the design.

The number of complete design repeats the jacquard can control based on its capacity and the ends per repeat.

The number of warp threads actually used by the jacquard to weave the design, considering the number of repeats handled.

The number of warp threads controlled by each individual hook on the jacquard.

The horizontal distance covered by one complete repeat of the design on the fabric.

The vertical distance covered by one complete repeat of the design on the fabric.

A technique used to reduce the warp density (ends per inch) in weaving by omitting some warp threads, even though the jacquard machine has enough capacity to handle them.

A calculation used to determine the number of hooks that will be utilized in a jacquard machine for a specific weaving design.

The actual number of hooks available for creating a weaving design after applying the casting out plan.

The unused capacity of a jacquard machine after applying the casting out plan.

A type of jacquard mechanism that lifts the warp threads on every pick cycle, resulting in slower operation.

A type of jacquard mechanism that lifts the warp threads after every two picks, allowing for faster operation.

A type of jacquard with large needles and wide spacing between them, resulting in limited capacity.

A type of jacquard with small needles and close spacing between them, enabling a greater capacity to create complex designs.

A type of fine pitch jacquard, also known as Continental pitch, known for its ability to create fully open sheds.

Jacquards are classified into mechanical and electronic types, with different methods of selecting weave designs.

A jacquard that uses a mechanical system, like punched cards or continuous paper, to select the weave design.

A modern jacquard that uses electronic signals to control the weave design without any physical cards or paper.

This type of jacquard uses only one cylinder to control the shedding mechanism, working for both even and odd picks.

This type has two cylinders, one for even picks and the other for odd picks, resulting in more complex designs.

The mechanism used to raise and lower warp threads in a jacquard loom, controlled by a system of pegs, hooks, and knives.

A basic type of jacquard shedding mechanism where a single lift is applied to the warp threads using a single cylinder.

The principle in which the warp threads are held down by default and only lifted selectively when needed to form the weave pattern.

In a jacquard loom, a single cylinder moves after each pick to control the selection of warp threads based on the weave design. This cylinder controls which hooks will be lifted or lowered.

A hook that locks onto the fixed griffe when the main hook is lifted, ensuring the warp thread stays lifted during the next pick cycle, creating a sustained shed.

A needle that determines whether the hook should be lifted or lowered for the next pick. If the needle has a hole, the hook remains lifted, if not, the hook is lowered.

A mechanism that displaces the hook to the right, disengaging it from the fixed griffe, causing the warp thread to lower.

An electromagnet used in electronic jacquard machines to control the lifting and lowering of the hooks, based on the weave design.

Computer-aided design software used to create intricate weave patterns, which can then be transferred to the electronic jacquard.

Electronic Jacquard Shedding (EJS) eliminates the need for physical selection cards like punched cards or continuous patterns, streamlining the process and allowing for complex designs.