TL;DR
Tension-driven fabric defects are usually an inconsistent yarn feed, a dirty yarn guide, or a feeder unit with a worn yarn wheel. Check tension at each feeder before adjusting any take-down parameters.
What you might see
- lengthwise stripes or courses of varying density
- stitch length variation across courses
- fabric weight inconsistency within a roll
- tension alarm on one or more feeders
Likely causes
Worn yarn wheel on a positive feeder allowing inconsistent yarn delivery
Yarn guide contaminated with wax, oil, or fiber buildup creating friction variations
Cone or package with inconsistent yarn count or twist affecting pull-off tension
Take-down roller pressure uneven causing variable fabric draw-down
Required tools
- Yarn tension gauge
- Replacement positive feeder yarn wheel
- Cleaning solvent approved for yarn guide material
- Take-down roller inspection gauges
Safety first
- Do not reach into the cylinder gap while the machine is rotating. Stop and lock out the machine before adjusting yarn guides inside the cylinder.
- Cleaning solvents may cause skin or eye irritation. Wear appropriate gloves and glasses.
Procedure
- 1
Run a short length of fabric and mark the course where the defect appears. Count back to identify the feeder responsible.
- 2
Measure yarn tension at each feeder with a tension gauge. Flag any feeder with a tension deviation greater than 10% from the average.[1]
- 3
Inspect the yarn guide at each high-deviation feeder for buildup. Clean with a dry cloth or light solvent approved for the guide material.
- 4
Check the positive feeder yarn wheel for wear, grooves, or slippage. Replace the wheel if wear grooves are visible.
- 5
Inspect the yarn package at the affected feeder for tight spots or variable diameter. Replace the package if visual inspection shows uneven winding.
- 6
Check the take-down roller rubber surface for hardening, glazing, or uneven wear. Replace the roller if the surface is no longer gripping fabric evenly.[1]
- 7
Run 5 meters of fabric after repairs and verify tension is consistent across all feeders.
Sources
Mayer & Cie Mayer Relanit Knitting Machine (Circular / Flat) general technical documentation, Mayer & Cie
Mayer & Cie circular knitting machine general yarn tension and feeder maintenance procedures (general)
More guides for Mayer & Cie Mayer Relanit
How to fix cylinder drive belt slippage or noise on a Mayer Relanit
Drive belt slippage or noise is usually a worn or stretched belt or a misaligned pulley. Check belt tension and pulley alignment before ordering a replacement.
How to fix needle breakage on a Mayer Relanit circular knitting machine
Needle breakage is usually a bent needle hook, incorrect yarn tension, or worn cam track. Inspect the needle bed and cam tracks at the affected feeder before replacing individual needles.
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