Technical

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Submitted By rawalnisha
Words 925
Pages 4
ELECTRONIC JACQUARD

1. INTRODUCTION: In electric jacquards electricity is used to move the needles. In this for a 400 needle jacq, 400 EM, 400armature, 400 metal feelers, 800covered wires and a battery are used. The mechanism is very complicated as the moving parts and wirings are more so we switch over to electronic jacquard. Modern electronic jacquard operates on high speed with millions of selections.

2. FEATURES OF ELECTRONIC JACQ:

1. Cards and needles are not required. Hooks are selected by EM. 2. EM directly selects the hooks at top. 3. There is a flexibility of design change. 4. It works on the principle of open shed jacquard. 5. Its capacity is much higher from 6000-12000 hooks. 6. It forms clear V-shed. By means of complementary cams 82 different lifting of knives is possible which produces equal shed cloth or opening at front wall of the shuttle. 7. There is two way data transfer which enables loom data to be transferred to the central computer and designing data can be transfer to individual computer. 8. Weaving of patterns according to a desired and programmable production program.

3. TYPES OF ELECTRONIC JACQ:

a) Pulling type electronic jacq: Example- Bonas MJ9, Bonas 1334, Bonas CSJ.

b) Retaining type electronic jacq: Example- Staubli LX1660, Staubli CR720, Staubli S2700, Staubli CX870, Staubli LX30, Schleicher, Grosse.

4. BONAS ELECTRONIC JACQUARD:

PRINCIPLE: Based on pulling type electro-magnet principle. ESSENTIAL PARTS: Two latches, two hooks, two knives, one double pulley arrangement for one warp. SPEED: Access of 1000ppm. WORKING: As described in below figures. (1) In fig.1, both the knives gets harmonic motion from a cam, goes upward & downward respectively with hooks. Right hook takes upward movement with knife towards…...

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