Causes and Remedies of Various Knitting Faults

Causes and Remedies of Various Knitting Faults

 Needle Line

Causes:

  • Due to defective needle.                     needle line
  • Dirty needle slot.
  • Needle too tight or loose in the slot.
  • Due to improper lubrication of needles

Remedies:

  • Replacing all the defective needles having, bent latches, hooks or stems.
  • Removing the fibers accumulated in, the Needle tricks (grooves).
  • Replacing any bent Needles, running tight in the tricks.
  • Checking the Needle filling sequence in the Cylinder / Dial grooves (tricks).

 

Hole

Causes:

  • Due to badly tied knot.hole
  • Needle break due to slub.
  • Due to high tension of yarn.

 

Remedies:

  • Ensuring uniform yarn tension on all the feeders, with a Tension Meter.
  • Rate of yarn feed should be strictly regulated, as per the required Stitch Length..
  • Eyelets & the Yarn Guides, should not have, any fibers, fluff & wax etc. stuck in them.
  • The yarn being used, should have no imperfections, like; Slubs, Neps & big knots etc

 

Oil Mark

Causes:

  • Due to improper lubrication.
    • Fibers & fluff accumulated in the needle tricks, which remain soaked with oil.

 Remedies:oil mark

  • Fibers, accumulated in the needle tricks, cause the oil to seep into the Fabric.
  • Remove all the Needles & the Sinkers of the machine, periodically.
  • Cleaning the grooves of the Cylinder & Dial of the machine thoroughly.
  • Blowing the grooves of the Cylinder, Dial & Sinker ring, with dry air after cleaning.

Foreign Materials/ Fly

Causes:

  • If foreign materials knit with the yarn.Foreign Materials

Remedies:

  • Blowing the grooves of the Cylinder, Dial & Sinker ring, with dry air during cleaning.

Press Off

Causes:

  • When all or some of needles on circular knitting fail to function and the fabric either falls off the machine or design is completely disrupted or destroyed.Press off

 Remedies:

  • Needle detectors, should be set precisely, to detect the closed needles & prevent the fabric tube from completely pressing off.
  • Proper yarn tension should be maintained, on all the feeders.

Thick and Thin Place

Causes:Thick and Thin Place

  • Uneven tension.
  • Uneven courses.
  • Count Mix, lot mix.

Remedies:

  • Preventing count or lot mixing.
  • Maintaining uniform yarn tension..

 

Missing Yarn

Causes:

  • Faulty positive feed system.
  • Wrong feeder setting.Missing Yarn

 Remedies:

  • Correcting yarn feeding with proper tension.
  • Removing fly from yarn feeding path.

Lycra Out/Lycra Drop

 

Causes:

  • Faulty Lycra feeding system
  • Lycra Breakage.Lycra Drop

Remedies:

  • Checking Lycra feeding system.

Barre

Causes:

  • Due to variation of loop length
  • Count mixing.
    • High Yarn Tension
    • Package hardness variation

Remedies:

  • Ensuring uniform Yarn Tension on all the feeders.
  • Ensuring that the yarn being used for Knitting is of the same Lot no.
  • Ensuring that the hardness of, all the yarn packages, is uniform, using a hardness tester.

 Sinker Line

Causes:

  • Due to uneven movement of sinker.

 Remedies:

  • Replace, all the worn out or bent sinkers, causing Sinker lines in the fabric.
  • Sinker lines are very fine & feeble vertical lines, appearing in the fabric.
  • Remove the fibers, clogging the Sinker tricks (Grooves)
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