Md. Azmir LatifMSc. in Textile Engineer

An air-jet loom is a shuttleless modern

loom that uses a jet of air to propel the

weft yarn through the shed. It is one of

two types of fluid-jet looms, the other

being a water-jet loom, which was

developed previously.

Machine Type – Plus

Machine Sub Type- OMNI Plus 800

Maximum machine speed- 850

Leno Type: e- Leno

AIC

PFT

Sand roller Circumference – 534

mm

Sumo motor

Pre-winder( weft Feeder)

Cam with cam box.

Lever and Puller.

Reed.

Easing arm

Back rest

Take up roller

Cloth roller

Catch Cord

Weft cutter

Waste cutter

Filling detector

Disk type tensioner

Drop wire and Dropper bar.

Leno selvedge attachment (e- Leno)

Main nozzle (Fixed & Movable)

Relay nozzle

Temple

ELSY(Electric Leno Selvedge System)

Batcher

Pressure control regulator

PFT

Balloon Breaker

Waste winder

Bobbin break sensor

Electrical boards

MCB(Master control Board )

AIB (Air Insulation Board )

TRIAX-2 Board

WEB X

DDMP (Direct Drive Microprocessor )

LDEC (Loom drive Electronic Controller )

Primary motions

Shedding

Picking

Beat Up

Secondary motions

Let off

Take up

Tertiary Motion

Auto Warp stop Motion

Auto Weft stop Motion

Batcher motion

Brake motion

Possible Shedding

mechanisms in Picanol

Omni+ 800

Cam Shedding

Dobby Shedding

Jacquard

Shedding Devices

Heald Frame &

Heald Wire

Shedding Cam

Repeat gear

Bevel gear

ELSY (for selvedge)

Jack Lever

Shedding

Parameters

Shed Angle

Harness Frame

Height

Back Rest Depth

Drop Wire Bar

Height

Back Rest Height

22° to 34°

72-87 mm

1-6

-7 to +5

-8 to +19

Mechanism of shedding

1. Sumo motor

2. Bevel gear

3. Repeat gear

4. Cam

5. Jack Lever

6. Long Lever

7. Connecting Rod

8. Harness Frame

*The whole shedding Mechanism is controlled by MCB board.

3/1 4/12/1

2/2 3/21/1

Weft Insertion Passage:

Creel

Weft tensioner

Pre-winder

Balloon Breaker

PFT

Fixed Main Nozzle

Moveable Main Nozzle

Relay Nozzles

Filling Detectors (FD1,FD2)

The pre-winder contains the following components:

The motor and control unit

The drum with 7 independently adjustable fingers

The magnetic winding blocking unit for controlling the filling length

The yarn-supply sensor

The positioning sensor

The winding sensor

The bobbin break sensor

FIXED NOZZLE

MOVEABLE NOZZLE

Relay Nozzles

Total No of relay nozzles 27

Divided into 2 groups

Left ( Contain 14 nozzles)

Right ( Contain rest of the nozzles)

Total no of relay valve(2)

Left Relay valve

Right Relay valve

Air Pressure:

Main line pressure

7 to 9 Bar Required

Main valve pressure

Up to 6 Bar

Auxiliary valve pressure

5 to 6 Bar (Fixed)

Left relay valve pressure

Up to 5.5 Bar (Depends on Weft yarn Count & M/C RPM)

Right Relay valve pressure

Up to 0.5 Bar more than left relay valve pressure

Compressing Equipments:

Compressor & Filter

Receiver tank

Air dryer

Main line filter

Sub-micron filter

Micro mist filter

Reservoir

Compressing Equipments:

Compressor & Filter

Receiver Tank

Air dryer

Functions:

To collect raw air, separate large particles & compress the air.

Store compressed air for preventing pressure pulsation, separate moisture, grease & other impurities

A refrigerating air dryer is used to remove moisture

Compressing Equipments:

Main line filter

Sub- micron filter

Micro mist filter

Reservoir

Functions:

Removes 3-5 micron size foreign particles.

Removes 0.3-1 micron size substances such as tar & Carbon.

Remove 0.01 micron size particles, e.g. grease

To reserve the filtered air

Cam beat up Profile Reed is

used

VARIOUS TYPES OF REED COUNT:

590 DM

652 DM

739 DM

985 DM

869 DM

787 DM

1190 DM

1085 DM

931 DM

DM: DENTS PER METER

Let off is done electrically.

An electric motor is used to

perform this action.

Let off motion is very important to

maintain accurate warp tension

Speed of let off motor gradually

increases with the decrease of

beam dia.

Suggested value of tension for different warp

countWarp count ( Ne) Warp tension ( kN)

(for 4464 ends)

6 2.40

7 2.30

8 2.20

9 2.10

10 2.10

12 2.00

14 1.90

16 1.80

20 1.65

30 1.65

Calculation warp of tension in case of

multi count warp.

Example: (7oe+9oe+12oe) 4:5:3

Warp tension to be set:

(2.30x4)/12+(2.10x5)/12+(2.00x3)/12

=2.15 KN

Connecting a warp beam with ELO

Take up is done electronically

Take up is synchronized with the let off motion with the help of a servo motor

Take up = Late off+ crimp %

Servo motor drives the emery roller Fig: Emery roller driven by servo

motor

Warp Stop motion

It is constituted with drop wire and electrode.

When drop wire fall (due to breakage of warp) on the contact bar a electronic circuit and send a signal to stop the machine

Weft stop motion

Filling yarn is detected by a filling detector.

FD is constructed with a light emitting diode and photo electric sensor .

The filling yarn interrupt the continuity of light and photo electric sensor convert it into a electronic signal.

Other stoppage:

Bobbin breakage

Leno breakage

Catch cord breakage

Batcher stop

Machine brake

Motors used in PicanolOmni+ 800 Air jet Loom:

Sumo Motor

Hydraulic Motor

Cutter Motor

ELCA Motor

ELSY Motor

PFT Motor

ETU Motor

ELO Motor

E-leno Motor

Pre-winder Motor

According to the

need and urgency,

the maintenance

plan is divided

according to a

certain period on

the time scale.

Maintenance Plan:

Daily Maintenance

Weekly Maintenance

General Periodic

Maintenance (3 to 6

months)

Preventive

maintenance in the

long term (6 to 12

months)

Daily Maintenance:

Oiling (Harness guides)

Greasing (16 points for 3/1 twill, 15 points for 2/1 twill)

Greasing points:

Sley -2 points

Long lever-2 points

Let-off gear-1 points

Tension roller-4 points

Free roller-2 points

Jack lever 4 points for 3/1 twill, 3 points for 2/1 twill.

Easing connector

No. Lubricant Brand Type

01. Grease Mobile Gear 600 XP EP-600

02 Oil (for

Harness)

Mobile Gear 600 XP ISO- 150

03 Oil 9for Cam

box)

Mobile Gear 600 XP ISO- 320

Types of lubrication:

Splash Lubrication

Circulating

Lubrication

Hand Lubrication

Splash Lubrication:

The parts requiring

continuous lubrication

have been placed inside

housings. These

housings are partially

filled with oil. As a

result of the movement

of certain parts, this oil

is splashed onto other

parts. This is referred

to as splash lubrication.

Maintenance

Circulating Lubrication:Components that need to be lubricated continuously and for which the splash lubrication is not sufficient, are lubricated by means of a circulating lubrication system (oil circuit supplied from the oil tank).

Hand Lubrication:

The term "hand lubrication" refers to the components that must be lubricated manually at specific lubrication intervals.

Hand Lubrication Points

The clamp and clamp support of the tucking-in devices.

The clamp and clamp support of the tucking-in devices.

The BLF back rest with single roll without easing motion.

The BLF back rest with 2 rolls with easing motion

The sley bearings (only in case of important dust production).

The ELSY-device For the lubrication of the U-shaped guides.

The tucking-in devices.

The sley bearings.

The rotary selvedge device

The bobbin holders of the rotary selvedge device.

The harness guides.

Transmission mechanism harness connection.

Hand Lubrication points:

Transmission mechanism of harness connection.

The warp beam gear.

The rod guide.

The bearing of the tucking-in device.

The engaging mechanism of the warp beam.

The shaft of the slipping clutch of the cloth roll.

The cloth roll drive & connection at the LH and RH machine side.

The shaft of the drive pinion of the sand roller.

It is difficult to predict machine operating temperatures, as these depend on machine running times, machine efficiency, ambient temperature and load on the machine (fabric, number of frames, etc.).

Recommended Machine Temperatures:

The normal machine oil temperature should be less than 55°C;

The Dobby temperature should be less than 65°C;

The cam motion temperature should be less than 60°C;

And the let off temperature should be less than 50°C.

THANK YOU