Combing Faults with Causes and Remedies

Last updated on August 8th, 2023 at 12:13 am

Different Types of Combing Faults and Their Possible Remedies

• Incorrect roller setting, excessive draft, roller slippage or loose drafting rollers at the sliver and ribbon lap formers; lap former and comber drafting rollers.
• Incorrect timing of the detaching roller cam.
• Too deeply setting of the top comb.
• Top comb touching the back detaching roller.
• Lack of lubrication of top detaching roller.
• Stretching of the web in the condensing plate.

The probable causes are –

• Oil on roller.
• Higher relative humidity percentage.
• Improper weighting of the top roller.
• Sticky dirt on roller.

The following are the probable causes –

• Incorrect timing of the detaching cam.
• Faulty top detaching roller covering.
• Dirt in the flutes of steel detaching roller.
• Air current originating in the aspirator, excessive brush speed or too low fan speed
• Incorrect atmospheric conditions; air may be too dry or too humid.

The possible causes are as follows –

• Defective back covered detaching roller.
• Foreign matters wedged between the nipper jaws.
• Faulty nipper setting.
• Presence of tailing hook in the fibres is a major cause.
• If the already detached fringe is fed back into the last raw of cylinder needles during backing off.
• If the detachment setting is wider than the required length of fibres.

The causes are –

• Damaged brush.
• Hooked comber needles.
• Brush set too far from cylinder.

• The pawl operates on too many teeth in the ratchet wheel on the wooden roller.
• The feed roller ratchet pawl operates on less no. of teeth.

The causes are –

• Improper gearing of the pawl with the feed roller ratchet.
• Incorrect nipper setting or foreign matters wedged between the nipper jaws.
• Back covered detaching roller requiring lubrication.

The probable causes are –

The probable causes are –

• Poorly oriented fibres and hooked fibres which cause running of short fibres with the longer fibres and fibres breakage.
• Damaged needles.

The causes are –

• Unequal weighting of top drafting roller.
• Incorrect distribution of draft in the drafting zone.
• Unequal setting of detaching roller, rocking mechanism.
• Neps in the sliver.
• Tension draft.
• Grooved or worn roller covering.

The remedies to the causes of various faults in combing are opposite. Steps i.e. if the fault is due to the incorrect setting; the setting should be corrected, if for improper lubrication, it needs correct lubrication and if for damage needles, they should be replaced and so on.