A seven-step method for machinery sample testing (Source: FAT Testing Guidelines): ① Define the test plan (what to test / acceptance criteria / whose materials to use); ② Ship raw materials (using your own materials yields the most realistic results); ③ Visual and dimensional inspection (against approved drawings); ④ No-load operation (cycling without a load); ⑤ Load testing (actual testing using your materials); ⑥ Safety functions (emergency stop / protective guards); ⑦ Comprehensive documentation (parameters / results / photos)—Note: Passing the sample test does not equate to final acceptance of the entire machine.
I. Define the Test Plan
Test objectives: Verify production capacity, precision, and quality (specify exact figures);
Test materials: Use the buyer’s own raw materials (for the most realistic results); Test conditions: Temperature, humidity, and voltage; Acceptance criteria: Standards for passing (tolerances, scrap rates); Duration: Continuous operation (avoid short, intermittent tests; Source: Jez)—Draft the plan before testing (without criteria, the test is meaningless).
II. Ship Raw Materials
Ship in advance: Send raw materials to the factory before testing begins (Source: Kingsler);
Representativeness: Materials should match daily production (do not send “ideal” materials); Labeling: Mark each batch of material (batch number / specifications); Quantity: Sufficient for continuous testing; Hazardous materials: Include safety instructions—Test with actual raw materials (materials used in a manufacturer’s demo may look good, but that doesn’t mean your materials will be easy to process).
III. Visual and Dimensional Inspection
Consistency: Model, configuration, and component brands match approved drawings; Appearance: Quality of welding, coating, and assembly; Dimensions: Overall dimensions, interfaces, and mounting dimensions; Identification: Nameplates, safety signs, and warning labels; Protection: Protective guards and light curtains properly installed—first, verify “is this the right machine” (to prevent receiving the wrong item).
IV.
Dry Run
Dry Cycle: Continuous operation without load for a specified duration; Checks: Alarms, abnormal noises, vibration, and overheating; Axes: Spindle, axis movements, tool changing, and rotation; Parameters: Speed, positioning, and repeatability; Lubrication & Cooling: Oil circuits and cooling systems functioning normally—dry runs check the basics (if it fails simple operation, there is a fundamental issue).
V.
Loaded Test
Use Your Materials: Buyer’s own workpieces, profiles, or products; Full Load: Operation at rated load; Verification: Actual output dimensions, precision, and production capacity; Continuous Run: Continuous production for a sufficient duration (to verify stability); Records: Inspection data for each piece—loaded testing is the core of sample testing (good performance on demonstration material does not guarantee the same on your material).
VI.
Safety and Functionality
E-Stop: Emergency stop response; Safety Door Interlock: Machine stops when the door opens; Light Curtain: Response to obstruction of safety light curtains; Restart Logic: Restarting after power loss; Manual Intervention: Loading/unloading and confirmation steps—safety testing cannot be skipped (failure of safety functions = accident hazard).
VII. Comprehensive Documentation
Record items: Machine model/software version/fixture setup; Environment: Temperature & humidity/power supply; Materials: Brand/batch/dimensions; Process: Test steps/parameter adjustments;
Results: Test data/photos/video (Source: Jez)—Records serve as the basis for acceptance (and are crucial for resolving any future disputes).
VIII. Key Considerations
First, samples are not the final production units (a passing sample applies only to that specific prototype; Source: Robota); second, include the test protocol in the contract (acceptance criteria/duration/materials); third, participate on-site or via video (remote live-streamed testing); fourth, remediate non-conformities (re-test after rectification);
fifth, ship only after FAT approval (factory acceptance is a prerequisite for shipment)—Mechanical equipment sample testing involves seven steps: plan → materials → visual inspection → no-load run → load test → safety check → documentation (use your materials, apply your acceptance criteria, and keep a full record).
