TECHNICAL SUPPORT

Yarn joining devices

MESDAN considers of fundamental importance to pay attention to the indications, the needs and the evaluations of its customers to guarantee their utmost satisfaction, and to supply products, solutions and services of high quality standards.

You can directly send your suggestions, talk about your technical problems or dissatisfactions so that MESDAN can evaluate the situation and undertake the necessary actions to satisfy your requests and to solve your problems.
These information will become a very important resource for MESDAN, a means of permanent amelioration of its products and services to satisfy your expectations in the best way.

To request our assistance or to send us your suggestions, fill in the form or call us at the following number: +39.0365.6531.41.


Technical guide

For an immediate and easy reply to the most frequently asked questions, and to the operational problems of simple and quick solution, MESDAN prepared an easy and practical reference "technical guide".

You can select, from the index below, the problem, or the question you are interested in, and you will find the operational indications to solve it.



Service:
Monday - Friday 9.00 am - 5.00 pm


Request technical assistance

All the requests will be answered in 2 working days.




























  QUESTIONS
  FAULTS
















































QUESTION
What to do if the splice is not made?

PROBABLE CAUSE

  • Yarns incorrectly introduced into the Splicer.
  • Chamber cover does not close.
  • Wrong setting of ends length: too short ends are expelled from the chamber; too long ends are clamped by the chamber cover (only for Aquasplicer).

FAULT
No splice occurs

REMEDY

  • Check yarn introduction.
  • Check efficiency of the cover and/or chamber cover spring.
  • Increase/decrease ends length. Check also ends retraction levers and springs.
 











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QUESTION
What to do if the joint is dry and weak (for aquasplicer only)?

PROBABLE CAUSE

Not enough or no water at all in the mingling chamber (only for Aquasplicer)

FAULT
Weak & dry joint (for aquasplicer only)

REMEDY

Check water presence and pressure (between 0,5 and 1 bar) in the connections and that there are no obstructions in the water circuit (obstructions or air bubbles in the hoses). Verify the efficiency of the water valve and its lever. The normal consuption of water is 0,3-0,5 cc per cicle : for verification execute 50 joints and measure the quantity of discahrged water dropping from exhausting hoses.

 











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QUESTION
What to do if the joint splits up due to the slippage of the ends?

PROBABLE CAUSE

Air pressure too low and/or air blast too short.

FAULT
Weak joint (the two ends slip and the joint looses).

REMEDY

Restore correct air pressure over 6 bar (minimum 6 bar) and/or increase the air blast in the chamber.

 











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QUESTION
What to do if the joint is thin and weak?

PROBABLE CAUSE

  • Too short ends overlap.
  • Too high air pressure.
  • Too long junction air blast.
  • Chamber or preparators not suitables.

FAULT
Weak & thin joint

REMEDY

  • Increase ends overlap or decrease ends preparation air blast.
  • Decrease air pressure.
  • Decrease the junction air blast.
  • Try another chamber.




Weak & thin joint

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QUESTION
What to do if the joint has visable ends?

PROBABLE CAUSE

  • Too long ends overlap.
  • Insufficient yarn ends preparation.

FAULT
Joint with visible ends.

REMEDY

  • Decrease ends ovelap.
  • Increase ends preparation air blast (or blast time where possible).




Joint with visible ends.

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QUESTION
How to avoid water leakage?

PROBABLE CAUSE

  • Damaged cover rubber seal.
  • Damaged cover springs.
  • Faulty water valve.

FAULT
Water leaks

REMEDY

  • Check cover rubber seal.
  • Check the efficiency of the cover springs.
  • Check valve efficiency and the exact position of the seal.
 











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QUESTION
How to avoid improper ends preparation?

PROBABLE CAUSE

  • Preparators or oscillators with opposit twist compared to yarn (S for Z twist yarns and viceversa).
  • End preparation blast inadequate.

FAULT
Improper ends preparation

REMEDY

  • Replace with proper preparators or oscillators.
  • Adjust ends preparation blast.




  

Ends preparation table









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QUESTION
What to do if the joint is thick and weak?

PROBABLE CAUSE

  • Too long ends overlap.
  • Too low air pressure.
  • Splicing blast duration too short.
  • Wrong chamber.

FAULT
Thick joints with low strength


REMEDY

  • Decrease ends length or increase preparation blast.
  • Increase air pressure.
  • Increase splicing blast duration.
  • Change the chamber.




Thick joints with low strength

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QUESTION
What to do if the joint has protruding tails?

PROBABLE CAUSE

  • Wrong yarn introduction.
  • One preparator (or oscillator) is inefficient.
  • One yarn end is not clamped.
  • Yarn not intercepted by the ends retraction lever.

FAULT
The joints have one protruding end.


REMEDY

  • Check yarn introduction.
  • Check the parts and change if necessary.




The joints have one protruding end.

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QUESTION
What to do to avoid air leakage in idle position?

PROBABLE CAUSE

  • Jointair not in idle position.
  • Air coupling not properly connected or damaged.
  • Valve gasket damaged.
  • Dirt or impurities prevent sealed gasket closure.

FAULT
Air leaks when Jointair is idle .


REMEDY

  • Check splicer idle position and winder driving head motor (if automatic).
  • Check and replace.
  • Check and replace.
  • Remove dirt and/or replace gasket and grease with suggested product.
 











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QUESTION
What to do in case of Irregular /excessive cycle repetition?

PROBABLE CAUSE

  • Excessive torque resistence.
  • Driving motor failure.
  • Improper yarn introduction.
  • Too short overlapping.

FAULT
Irregular or excessive cycle repetition of the winding head (only for automatic)

REMEDY

  • Check and grease main cam, mechanical movements and valve assembly.
  • Check and replace motor.
  • Check movements of winder introduction arms.
  • Increase ends length.
 











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QUESTION
Which are the ideal properties of water supply?

REMEDY

Demineralized water (exspecially in case of intensive splicing) prevents from scale formation which reduce the water valve and gaskets' efficiency and the yarn free movement thus affecting the splicer performance. The water pressure and quanity varies according to the yarn count : coarse counts request higer pressure / quantity of water If not indicated otherwise , it is recmmended a water pressure of 0,5 (for fine counts) and of 0,8 (for coarse counts).

 











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