Qingji QJGO-1 Dual-Drum Free-Fall Drop Testing Machine
| Brand | Qingji |
|---|---|
| Origin | Shanghai, China |
| Model | QJGO-1 Dual-Drum |
| Drop Heights | 500 mm and 1000 mm (dual-position simultaneous operation) |
| Maximum Specimen Weight | up to smartphone-class devices (~250 g typical) |
| Specimen Compatibility | Small electronic consumer products (e.g., mobile phones, Bluetooth earphones, remote controls, power banks, chargers, calculators, CD players, electronic dictionaries) |
| Compliance Standards | GB/T 2423.8, GB 2099–2008, IEC 60068-2-32, IEC 60884-1, EN 50075 |
| Rotation Speed | 5 rpm (fixed-speed motor-driven drum) |
| Drop Frequency | 5–15 impacts per minute |
| Counting Range | 6-digit digital counter |
| Power Supply | 220 V AC, 1500 W total |
| Net Weight | 120 kg |
| Drive System | Gearmotor with speed-reduction gearbox (standard) |
Overview
The Qingji QJGO-1 Dual-Drum Free-Fall Drop Testing Machine is an electromechanical test system engineered for standardized evaluation of mechanical robustness in small electronic consumer devices under repeated free-fall impact conditions. It operates on the principle of controlled rotational drop simulation: specimens are placed inside two independent cylindrical drums, which rotate at a fixed angular velocity (5 rpm). Each full revolution induces two discrete, gravity-driven free-fall events—ensuring consistent impact energy delivery without external acceleration or pneumatic actuation. This method replicates real-world accidental drop scenarios encountered during handling, transportation, or daily use, enabling quantitative assessment of structural integrity, housing durability, internal component retention, and interconnect reliability. Unlike single-axis vertical-drop testers, the dual-drum architecture provides statistical repeatability across multiple orientations and impact vectors, aligning with the stochastic nature of field failures.
Key Features
- Dual independent drum stations operating simultaneously at identical parameters—enabling parallel testing or comparative analysis between two specimen batches.
- Precisely calibrated drop heights of 500 mm and 1000 mm, each corresponding to nominal impact energies of approximately 1.23 J and 2.45 J (assuming 250 g mass), traceable to gravitational acceleration (g = 9.81 m/s²).
- Fixed-speed gearmotor drive ensures stable rotational frequency (5 rpm ±0.2 rpm) and synchronized drop timing; optional VFD integration supports adjustable rotation rates for protocol-specific validation.
- Transparent polycarbonate safety cover with interlocked door switch halts rotation immediately upon opening—meeting IEC 61000-4-2 level compliance for operator protection.
- 6-digit programmable counter with reset function enables precise control over total impact cycles (1–999,999), supporting pass/fail criteria defined by standards such as IEC 60068-2-32 (minimum 1000 drops per specimen).
- Modular drum interior geometry minimizes sliding friction prior to release, ensuring true free-fall kinematics rather than slide-and-drop artifacts.
Sample Compatibility & Compliance
The QJGO-1 accommodates compact portable electronics including smartphones, wireless earbuds, USB-C chargers, lithium-ion power banks, and low-voltage connectors. Specimens must fit within drum internal dimensions (customizable per client specification), with maximum recommended mass ≤250 g to maintain kinetic consistency across test runs. The system satisfies mandatory requirements for electrical accessory certification under GB/T 2423.8 (Ed: Free Fall), GB 2099–2008 (plugs and socket-outlets), IEC 60884-1 (household plugs), and EN 50075 (telecom terminal equipment). All test reports generated using this instrument may be referenced in GLP-compliant documentation when paired with validated calibration records and audit-trail-enabled software (see Software & Data Management section).
Software & Data Management
While the base QJGO-1 operates via front-panel push-button controls and hardware-based counting logic, optional PC-integrated firmware (Qingji TestSuite v3.2+) enables USB/RS-232 data logging, automated cycle sequencing, timestamped event capture, and export to CSV or PDF formats. When configured with audit-trail mode, the system complies with FDA 21 CFR Part 11 requirements for electronic records—including user authentication, immutable log entries, and change history tracking. Calibration certificates for height measurement (laser distance sensor), rotational speed (optical tachometer), and timer accuracy (NIST-traceable quartz oscillator) are provided with each unit shipment.
Applications
- Pre-production validation of housing material selection (e.g., polycarbonate vs. glass-fiber reinforced ABS) based on crack initiation thresholds after 500+ drops.
- Design verification of internal mounting schemes for PCBs, batteries, and flex cables subjected to repeated inertial loading.
- Quality assurance screening for OEM manufacturing lines producing >10,000 units/month of Bluetooth peripherals.
- Third-party laboratory testing for CE marking submissions requiring evidence of mechanical shock resilience per EN 60950-1 Annex A.5.
- Comparative benchmarking of drop performance between competing product generations under identical test conditions.
FAQ
What standards does the QJGO-1 directly support?
GB/T 2423.8, GB 2099–2008, IEC 60068-2-32, IEC 60884-1, and EN 50075.
Can the drum rotation speed be adjusted?
Standard configuration uses a fixed 5 rpm gearmotor; variable-speed operation is available via optional VFD upgrade kit.
Is height calibration included at time of delivery?
Yes—each unit ships with a NIST-traceable laser distance verification report and height gauge certificate.
Does the system support GLP/GMP documentation workflows?
With optional TestSuite software enabled in audit-trail mode, yes—including electronic signatures, version-controlled protocols, and tamper-evident logs.
What maintenance intervals are recommended?
Lubrication of gearmotor bearings every 6 months; visual inspection of drum weld integrity and counter mechanism before each test series.
