Installing the machine
• Unloading the machine
A Dense Warp B Square fabric C Weft Density predominant Reduce warp density by 30% Reduce warp
density by 15% Use fine warp ends
Change selvedge
• Moving the machine : The machine can be moved by means of a crane or fork- lift track or by wheels. Appropriate lifting beam must be used. Whole length varies from 3760mm to 6470mm.
• Leveling the machine: Auxiliary tools for leveling the machine are :
i. A leveling instrument with an accuracy of 0.3mm/m
ii. Two hydraulic lifting jacks
iii. A lifting hook which supports front side of the frame.
iv. The back side is jacked up by means of the warp beam support.
• Glueing the machine: To prevent the machine from moving due to
vibrations, it is glued to the floor with a two component epoxy glue.
• Leveling the control panel support:
• Fixing the double warp beam
• Warp beam bearing poitions
• Installing the control box
PARTS OF THE MACHINE:
The 1131 and 2231 CAN plus Prewinder
• Aligning the pre-winder
• Positioning the balloon breaker
• Changing the sense of rotation of prewinder
• 4-pick insertion
The fixed main nozzle: Parts of the fixed nozzle are:-
• Replacing injectors
• Changing assignment
• Weaving setting
The fixed main nozzle should be positioned such that the line leading from the prewinder drums’ centre to the movable main nozzle is as straight as possible.
• Parts of the movable main nozzle are:-
One or more main nozzle modules
Injector Air inlet
Nozzle extension
The filling yarn count dictates which injector and main nozzle body will be used. The fixed and movable main nozzle cannot be exchanged with each other.
Injectors are available in different types like conical and cylindrical. The internal operations uniquely identify the different injectors.
• Replacing parts:
The following actions can be undertaken without dismantling the movable main nozzle from the machine:- i) Replacing the injectors
ii) Replacing the main nozzle module
• Channel assignment: It is advisable to use the channel nearest to the reed.
• Setting the pressure: The pressure can be set on the front left side of the machine. The pressure of the main nozzle determines the speed of the filling yarn.
• The filling clamp: there is a filling clamp per channel at the main nozzle inlet. It is open during filling insertion and clamps the filling if insertion doesn’t take place.
• The directional nozzle: To lead the filling in a right direction during the insertion start.
• Weaving settings: This can be adjusted in two ways:
i) Lateral position ii) Depth adjustment
• The swinging main nozzle: Switching mechanism
• Arranged over the entire length of the reed, these assist the movable main nozzle in blowing the pick through the reed guiding channel. Relay nozzles are fitted to the right of the last warp ends to direct the pick towards the suction mouth
• Relay nozzles are divided up into groups, in that each group of
nozzles is served independently by a dedicated relay nozzle value. The second and rest of the relay nozzles are placed at uniform distances, i.e., 74mm from one another.
• The more the relay nozzle is turned towards the reed, the
higher the yarn flight in the insertion channel.
• The higher the pressure, the lower the yarn flight in the
insertion channels. The pneumatic control
• Compressed air
• Pressure regulators
The pressure for the relay nozzles must be set as low as possible with no weaving faults occurring and with a minimum number of machine stops.
i) MAIN VALVE REGULATOR: Regulates pressure on buffer tank(s) for main nozzle. Pressure of main nozzle determines the speed of filling yarns.
ii) AUXILIARY PRESSURE REGULATOR: Regulates the pressure for the auxiliary functions: a) pistons of pick finder
b) Pre-winder, threading and PFT threading c) Chimney stretching nozzle
d) Extraction nozzle e) tucking-in device f) Clamp on main nozzle g) 8 color switching valve This is set for fixed value 6 bar.
iii) LEFT RELAY NOZZLE REGULATOR: Regulates the pressure on the left hand relay nozzle buffer tank.
iv) RIGHT RELAY NOZZLE REGULATOR: Regulates pressure on the RH relay nozzle buffer tank.
iv) QUICK COUPLING: Pressure from different regulators can be measured by
means of a manometer through quick coupling.
• Air distribution :
i) Main distribution block
ii) Air to buffer tank fixed main nozzles
iii) Air to buffer tank movable main nozzles
iv) Air distribution block
v) Air to LH and RH buffer tank
vi) Pneumatic unit above movable main nozzle (pneumatic unit)
vii) ELCA on buffer tank
viii) Parking brake
ix) Value block, pick finding, counter flow
• Main Nozzle Modules
i) For movable main nozzle: Positioned on cross beam
ii) For fixed main nozzle: Positioned on power box support behind the left side cover
• Temple Nozzle
i) Used for a filling detector in front of the reed or next to the reed.
ii) To prevent yarn ends RH side from returning in the fabric, temple nozzle mounted on temple support.
Chimney stretching nozzle
It ensures that the filling yarn remains stretched during the closing of the shed. Extraction nozzle blows the filling waste out of the chimney stretching nozzle after the sley beat-up. Stretching relay nozzles
Waste guide is used to keep long filling waste away from the fabric. Extraction nozzle blows the filling waste behind the waste guide. Filling detector is mounted nest to last warp end.
Stretching nozzle is mounted next to filling detector. On machines equipped with a waste guide, the stretching relay nozzle is positioned behind the waste guide.
Filling detectors (in front of reed and next to reed) Functions:
• To control the arrival of filling yarn at RH machine side.
• Transmission of arrival time data to microprocessor.
• To make machine stop when it detects a filling yarn.
The filling detector’s function is based on the reflection of a light beam. They should be regularly cleaned by alkaline solution.
Filling cutter
It cuts the filling at the LH machine side at the end of insertion.
• It is found on left side of the machine next to air
preparation of the movable main nozzle.
• Timing of cutting: Time is set around 10 degrees and is
adjustable for each channel separately.
• The filling clamp: Used for a better control of the filling
yarn at the LH machine side. Reed
The Dobby
The outside cam motion Harness frames
The optimum height setting depends on a number of factors like article type, weave, and machine speed(rpm).