Q1：How can quality problems such as voice coil offset and uneven magnetization of magnetic circuit be completely solved in the automated production of speakers?

Answer:

Voice coil offset (resulting in distortion of sound quality), uneven magnetization of the magnetic circuit (affecting sensitivity) is the core quality pain point of automated production, JiuJi Automation through the "Equipment Accuracy + Process Closed Loop Control" Solution:

1. Voice Coil Positioning: Adopting "Visual Positioning + Servo Drive" voice coil positioning machine, automatically identifying the center of the magnetic circuit, with positioning accuracy ±0.01mm, and the offset rate is reduced from the traditional 2.5% to 0.3%;
2. Magnetic Circuit Magnetization: Customized automatic magnetizer, supports multi-pole magnetization (e.g. 2-pole, 4-pole), magnetizing strength error ≤±2%, with post magnetization detection module, unqualified products are automatically rejected;
3. Closed-loop process: set up online inspection nodes after each process (e.g. dispensing height inspection, assembly gap inspection), and upload the data to the MES system in real time to trace the production parameters of each horn.

Q2：How to ensure the consistency of sound quality for speakers produced by automated production line? What are the advantages compared with manual production?

Answer:

Consistency of sound quality (such as sensitivity, frequency response curve) is the core competitiveness of the speaker enterprise, automated production compared to artificial has an absolute advantage:

• Manual production: Subject to operating proficiency and fatigue, the error in sound quality consistency is usually ±3dB;
• Automation program: JiuJi automated production line guarantees consistency through 3 major measures:
  1. Accurate control of key parameters: dispensing volume error ≤ ± 0.01g, voice coil height error ≤ ± 0.02mm;
  2. Sound quality pre-test: integrated audio detection module, automatic testing of speaker sensitivity, distortion, unqualified products real-time triage;
  3. Data traceability: Each horn is assigned with a unique QR code, which can trace production equipment, operators, and inspection data, making it easy to locate quality problems;
• Actual effect: After a headphone speaker enterprise adopted the program, the sound quality consistency error was reduced from ±2.8dB to ±0.5dB, and the customer complaint rate decreased by 70%.

Q3：How to choose the speaker automation inspection equipment that is suitable for my product to avoid "over detection" or "missed detection"?

Answer:

The selection of inspection equipment needs to "match the product type + production tempo", JiuJi Automation offers "Customized Testing Solutions"The core steps are as follows:

1. Requirements sorting: Define testing items (such as airtightness, sound quality, appearance defects), testing accuracy (such as airtightness error ≤ 0.01MPa), and beat requirements (such as testing 3,000 units per hour);
2. Device Adaptation:
   • Appearance Inspection: Adopt AI visual inspection machine to recognize defects such as scratches and lack of glue, with an inspection speed of ≥1000 pcs/hour;
   • Performance testing: with audio analyzer, automatic testing sensitivity, impedance, frequency response curve, data automatically generate reports;
   • Airtightness testing: for waterproof speakers, adopt differential pressure airtightness tester, testing time ≤ 2 seconds / only;
3. Cost optimization: avoid blind procurement of high-priced equipment, according to the capacity needs with "online inspection + random inspection" mode, small and medium-sized production capacity enterprises can choose modular testing unit (such as a separate configuration of voice coil testing machine).