![]() Lead-free Reflow Profile: Soaking type vs.Reflow oven zone temperature set up and thermal profile Unlike a normal oven, which you set to a temperature and wait for it to get to that temperature, a solder reflow oven starts heating. Reflow soldering is an extremely vital step in the SMT (Surface Mount Technology) process.Timing chain, bearings, and tension pulley A PC is needed to reprogram the Nano or to capture the temperature data for graphing. A USB power supply is also plugged into the strip to provide 5 volts DC for the Arduino Nano, LCD, and temperature sensor if the cable is not plugged into a PC. Head sprocket, bearings and adjustable chain The oven AC plug goes to a plug strip with an on/off switch. The following table is a typical lubrication schedule example: Vacuum the chamber and remove the flux residue and soldering balls.Clean the ventilation pipe with a cleaning agent.The time the solder is held above its melting point (time above liquidus) is important to ensure correct ‘wetting’ occurs between components and PCB. The oven comes with a small tray which may come in handy to spread the heat a little over the PCB. A reflow soldering profile has been developed for SnAgCu solder paste regarding mass production requirements, measurement and furnace tolerances as well as. It is compact but still quite powerful which is good for fast heat changes. It's a 4 liter oven with infared heaters totalling 660W. Once the chamber temperature decreases to room temperature, open the hood and clean the inside surface of chamber with a proper cleaning agent. Reflow This is the stage where the temperature within the reflow oven is increased above the melting point of the solder paste causing it to form a liquid. First of all, let's meet the oven: The oven is a Princess PR2259.Clean the photoelectric switches which detect whether a board is within or outstide of the reflow oven.Check conveyor chains, sprockets, mesh and the automatic lubrication system.Clean and wipe down the machine daily.The following is a list of daily, house-keeping tasks to be accomplished for maintaining a reflow oven: This will cause inaccurate thermal data readings and the thermal controller will make the wrong adjustment instructions. Although there is a flux collection system in modern reflow machines, there still is a big probability tha flux will adhere to the inert air ventilation pipe and thermal regulator panel. One of the most important tasks for properly maintaining a reflow oven is remove the built-up flux residue inside the oven's chamber. Proper reflow overn maintenance can extend its life cycle, keep the machine in good condition, and improve production efficiency and product quality.
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