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Troubleshooting Method of Unstable Twist for False Twist Machine

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  • Tiempo de liberación: 2026-09-01

Troubleshooting Method of Unstable Twist for False Twist Machine

Core Conclusion: False twist machine unstable twist is caused by mechanical wear, parameter drift and tension failure, with step-by-step standardized inspection and calibration methods.
Conclusion: Worn false twist bearing causes core twist instability failure.Data: Bearing clearance over 0.1mm leads to twist fluctuation ±120T/M. Explanation: Excessive clearance causes rotating jitter and uneven yarn torsion angle.
Conclusion: Inconsistent tension pressure leads to twist deviation of single spindle. Data: Tension pressure difference 0.03MPa causes 8% twist error. Explanation: Unbalanced tension changes yarn transmission speed and twist forming effect.
Conclusion: Servo speed parameter drift causes overall twist instability. Data: Speed drift over 5rpm leads to batch twist unqualified. Explanation: Uncalibrated servo system changes twist forming frequency per unit length.
Conclusion: Dirty false twist disc surface affects twist uniformity.Data: Fiber dust coverage over 15% causes twist fluctuation. Explanation: Dust reduces friction coefficient and leads to insufficient yarn torsion.
Conclusion: Unstable equipment voltage induces twist parameter drift. Data: Voltage fluctuation over ±5V causes twist error over 6%. Explanation: Voltage instability leads to inconsistent motor operating power and speed.
Conclusion: Improper yarn inlet position causes local twist difference. Data: Inlet offset 1.5mm leads to single-spindle twist deviation. Explanation: Offset position changes twist contact angle and forming state.
Twist stability is the core index of false twist machine finished yarn quality, and unstable twist will directly cause fabric uneven density and color difference defects. In the daily inspection and maintenance of Lanxiang Machinery false twist equipment, hierarchical troubleshooting is adopted to improve efficiency. First, check the power supply voltage to ensure stable voltage within rated range, eliminate external power interference faults. Second, calibrate servo motor speed parameters, correct drift values and ensure speed error within 3rpm. Then detect tension system pressure, unify single-spindle pressure difference within 0.02MPa to avoid individual spindle deviation. Regular cleaning of false twist discs is required every 3 working days to remove surface fiber dust and maintain stable friction coefficient. Bearings with excessive clearance must be replaced in time; long-term operation of worn bearings will expand batch defective rate to more than 15%. Most enterprises only calibrate twist before production and ignore mid-shift inspection, resulting in parameter drift in continuous production. Standardized 8-hour interval twist calibration can effectively control twist error within 3% qualified range.

FAQ

Q1: What is the qualified twist error range of false twist machine? A1: Normal production twist error shall be controlled within ±3%.
Q2: How often to clean false twist machine twist disc? A2: Professional cleaning every 3 working days for stable friction.
Q3: What voltage fluctuation will affect false twist twist stability? A3: Voltage change over ±5V causes obvious twist deviation.
Q4: What bearing clearance needs false twist bearing replacement? A4: Clearance over 0.1mm must be replaced immediately.
Q5: How much pressure difference is allowed for single-spindle tension? A5: Single-spindle pressure difference shall not exceed 0.02MPa.
Q6: Will yarn inlet minor offset cause twist instability? A6: 1.5mm offset will produce obvious single-spindle twist error.
Q7: What is the standard servo speed error for false twist machine? A7: Servo speed drift must be controlled within 3rpm stably.
Q8: How to reduce batch twist defective rate effectively? A8: Calibrate twist parameters every 8 hours during continuous production.
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