SMT production line equipment is highly precise mechanical automation machinery. Both the equipment and process materials have certain requirements for the cleanliness, humidity, and temperature of the environment. In order to ensure the normal operation of the machinery and the quality of assembly, the following requirements are imposed on the working environment in the SMT surface-mount assembly process:
- Power Supply: The power voltage and power must meet the requirements of the machine equipment.
- Voltage stability is required: Single-phase AC220 (220±10%, 50/60HZ) Three-phase AC380V (220±10%, 50/60HZ). If the requirement is not met, a voltage stabilizer needs to be configured, and the power of the power supply should be more than twice the power consumption.
- Temperature: Ambient temperature: The optimum temperature is 23±3°C. Generally, it should be between 17°C and 28°C. The extreme temperature is 15°C to 35°C. (The optimum ambient temperature in the printing workshop is 23±3°C.)
- Humidity: Relative humidity: 45% to 70% RH.
- Working Environment: The workshop should be kept clean and hygienic, free of dust and corrosive gases.
- Air cleanliness should be Class 100,000 (BGJ73-84).
- In an air-conditioned environment, there should be a certain amount of fresh air, and the CO2 content should be controlled below 1000PPM and CO content below 10PPM to ensure human health.
- Anti-static: Production line equipment must be well grounded, using a three-phase five-wire grounding method and independent grounding. The floors, workbench mats, chairs, etc., in the production area should meet the anti-static requirements.
- Exhaust Ventilation: Reflow soldering and wave soldering equipment have exhaust ventilation requirements.
- Lighting: The factory should have good lighting conditions, with an ideal illuminance of 800LUX to 1200LUX, but not less than 300LUX.
- Requirements for SMT Production Line Personnel: Operators of various equipment on the production line must undergo professional skills training to meet standards, and must flexibly adhere to the safety operating procedures of the equipment.
- Operators should strictly follow the “Safety Technical Operation Procedures” and process standards.
