In the delivery of the card a pair of disc rollers scan the cross-section of the carded sliver as it emerges. These readings are compared electronically with the . Need of Autoleveller in. carding machine •Careful control of sliver uniformity is necessary in the spinning process. •So, continuous checking of sliver weight. Keywords: Autoleveller, Cotton yarn, Count variation, Draw frame. 1 Introduction able yarn count CV has been assessed for carded counts. The effect of single.

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Auto Leveling in Carding | Part 04 | Textile Study Center

ERM- Cleaner -Universal opening and cleaning machi Principle of short term auto leveling: If the measuring point is located downstream from the drafting arrangement, or if the delivery roller pair itself provides the measuring point, then the system is operating on the closed-loop control principle.

Graf ‘Optima” card auto leveller: Proper selection and positioning of machines in bl This operates via a regulating drive to adjust the in feed speed of the card so that the depth of the fiber layer on the main cylinder is held constant. Sliver variation cause the tongue upper roll to rise or fall.

This is the most commonly used principle of card auto leveling and serves to keep the sliver count constant. How the Carding Machine Works? The pulses derived autolevelleg this way are processed electronically so that the speed of the in feed roller can be adapted to the delivered sliver weight via mechanical or electronic regulating devices.


This lever drops when the sliver or the web breaks and, stop the card by the operation of the mechanism. Different principles for auto leveling can be selected depending upon the quality requirements and the operating conditions in the individual mill. Aero Mixer in Blowroom How it works?

Sliver passes between front draft controlling roller first, then passes between tongue and groove roller. Deviations in the set value are csrding electronically by altering the speed of the feed roller in the card. Deviations from i nominal count are processed by electronics into correction commands, which are executed at the card in take via the feed roll. If the actual speed differs from the set point, the variable speed motor is de-accelerated or accelerated untill the two speeds coinside i.

Settings in carding for different grades of cotton Ginning — Different Types Of Ginning machine.

Auto Leveling in Carding | Part 04

Dust extraction systems in Carding Developments in licker-in section of Carding Machi Spinning mills are therefore forced to use auto leveling equipment under highly varying circumstances. According to the basic principle of operation, autoleveller can be classified into two main groups: Grinding Roller For Carding machine How it works The irregularity of card feed material is the important reason for sliver count variation ranging from very short autolevelper 25 cm to very long term more than m variations.


In case of open loop system, as the delivered material is not sensed for its linear density to know whether the correction has made or not. As the calender roll move, the aluminium disc is lifted and comes in contact with adjustable pins, it operate the corresponding electro pneumatic valve on or off the doffer driving mechanism.

In the delivery of the card a pair of disc rollers scans the cross-section of the carded sliver as it emerges. Study of different parts of carding machine and th During the entry of abonormal thickness of lap or metal pieces under the feed roll, the knob raises.

Defects in Blow room and causes. To stop the doffer when sliver is missing or sliver is too thin or too thick ib when the lap-up choking on coiler calender Roller.

Powered by Facebook Comments. At both ends of the feed roller, microswitch is provided. Developments in carding section Auto leveler autoleveller in carding How it wo Production and waste control in Carding Machine Carding Maintenance program Fibre xutoleveller in carding and their effects on yarn q