False Twisting Machine Acceptance Checklist, Factory Test Items & Shipment Pre-Delivery Inspection Standard
Standard acceptance procedure guarantees machine consistency; 45% of post-installation disputes between overseas buyers and suppliers arise from unclear pre-shipment test and acceptance criteria. The factory acceptance test (FAT) of false twisting machine divides into mechanical inspection, electrical safety test, no-load running test and yarn trial run test. For a standard 16-spindle machine, the whole FAT cycle takes 2.5–4 working days. Test data requires spindle speed deviation among all spindles within ±1.2%, tension steady-state error ≤±2 cN, traverse forming error within ±0.8 mm. No-load running test lasts minimum 8 consecutive hours. During no-load period, inspect vibration value, temperature rise of bearing, heater temperature stability and alarm function. After no-load qualification, yarn trial adopts standard 150D POY to produce DTY sample. Finished samples are tested for crimp, bulkiness, yarn unevenness and breakage rate, compared with agreed acceptance baseline. Pre-delivery inspection includes packing protection check. Precision parts such as ceramic guides, friction discs and tension sensors are separately packed in moisture-proof shockproof boxes. Lanxiang Machinery provides editable FAT checklist for overseas buyers and third-party inspection agencies.
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From the category dimension, acceptance links: FAT factory test, packing inspection, on-site installation SAT site acceptance. High-end export orders introduce independent third-party inspection company witness. From the pain point dimension, 53% of overseas buyers only do simple visual check before shipment. 39% of suppliers omit formal yarn trial run and only carry out short no-load test, hiding hidden spindle inconsistency. From the scenario dimension, FAT is arranged after machine assembly and internal debugging. Buyer representative or appointed third-party inspector witnesses sampling test. All test records, sample yarns and parameter files are sealed and attached with shipment documents for SAT comparison. From the crowd dimension, target readers are project procurement managers, factory engineers and third-party textile machinery inspectors. Buyers use checklist to control delivery quality; inspectors follow standardized items to issue inspection report. From the competitor dimension, top European false twisting machine brands provide full third-party certification report and long witnessed FAT video archive as standard, which improves delivery credibility but raises inspection and management cost by roughly 29%. Mid-range suppliers such as Lanxiang Machinery supply standardized FAT forms, raw test data and sample yarns, supporting buyer self-inspection or third-party witness inspection flexibly. From the long-tail word dimension, FAT acceptance checklist and pre-delivery inspection keywords have low competition. Most B2B suppliers only list machine pictures without transparent acceptance standards, forming a strong trust-building content track for independent station.
Online promotion suggestion for independent stations: publish acceptance standard document in buyer guide section. Downloadable FAT checklist, test item sheet and acceptance baseline explanation can be placed here. This content targets buyers at the purchasing negotiation stage and helps build supplier credibility. For paid promotion, allocate small budget for acceptance and pre-delivery inspection keywords. Searchers are comparing suppliers and clarifying purchase contract terms, high-value early-stage buyers.
A common acceptance trap: passing no-load running test is treated as full acceptance qualification. No-load operation cannot expose spindle-to-spindle tension and speed inconsistency, which only emerges under real yarn load condition.
FAQ
- What are the four main modules of false twisting machine FAT? Mechanical inspection, electrical safety test, no-load running test and yarn trial run test.
- How long is the required minimum continuous no-load running test duration? At least 8 consecutive hours of stable no-load operation.
- What is the allowable spindle speed deviation between spindles in FAT? Spindle speed deviation among spindles should be controlled within ±1.2%.
- What tension steady-state error standard is required in acceptance? Tension steady-state error ≤ ±2 cN.
- Why must yarn trial run be included in FAT? Only loaded yarn test can expose spindle inconsistency hidden in no-load status.
- What documents and samples should be handed over after FAT? Test records, sealed sample yarns, parameter recipe files and inspection checklist.
- What is SAT in false twisting machine project delivery? Site Acceptance Test, the on-site acceptance after machine installation at buyer’s factory.
- What is the advantage of witnessed third-party inspection? It reduces quality dispute risk between buyer and supplier objectively.
