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Temperature Curve Setting Method of BGA Rework Station
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Temperature Curve Setting Method of BGA Rework Station
Ⅰ. Preheating Of BGA Rework Station

The main function of the preheating and heating section in the early stage is to remove moisture on the PCB board, prevent foaming, and preheat the entire PCB to prevent thermal damage. The general temperature requirements are: in the preheating stage, the temperature can be set between 60℃-100℃, generally 70-80℃, and about 45s can play the role of preheating. If it is too high, it means that the temperature of the heating section we set is too high, and the temperature of the heating section can be lowered or the time shortened. If it is too low, you can increase the temperature of the preheating section and the heating section or lengthen the time.

Ⅱ. Constant Temperature Of BGA Rework Station

The bga rework temperature setting is lower than the heating section. The function of this part is to activate the flux, remove the oxide and surface film on the surface of the metal to be soldered, and the volatile matter of the flux itself, enhance the wetting effect, and reduce the temperature difference. Generally, the actual test tin temperature in the constant temperature section should be controlled (lead-free: 170~185℃, lead: 145~160℃). If it is too high, the constant temperature can be lowered. If it is low, the constant temperature can be increased. If the preheating time is too long or too short in our measured temperature analysis, it can be adjusted to solve by lengthening or shortening the constant temperature period.

Ⅲ. BGA Rework Station Is Heating Up

After the second period of constant temperature, the operation is over, the temperature of the BGA rework station should be kept between (lead-free: 150~190℃, lead: 150-183℃). High, you can set the temperature of this section lower or shorten the time. If it is low, you can increase the temperature of the preheating section and the heating section or extend the time. (Pb-free 150-190℃, time 60-90s; leaded 150-183℃, time 60-120s), the heating setting is slightly higher than the constant temperature setting.