How to Reflow SMD with a Heat Gun

[paulxxxx]

Hi,

I just got a LeFavor 858 heat gun today. I bought it for re-flowing a 1"x1" chip. I played around with it and find it difficult to get the right flow rate, nozzle size, and temperature for the job.

The main difficulty is not knowing when does the solder melt under the chip. Unlike removing the chip, I cannot keep pushing it until it moves. If it moves, I will never be able to put it back.

Is this the right tool for the job?

I do have an old toaster oven.

[diif]

Re: How to Reflow SMD with a Heat Gun

Perhaps it's a little underpowered, a pre heater underneath should help.

[stj]

Re: How to Reflow SMD with a Heat Gun

" If it moves, I will never be able to put it back." ??
you arent supposed to lift and replace bga with the old solder.

[itsaquestion]

Re: How to Reflow SMD with a Heat Gun

The LeFavor 858 heat gun can be used, but it's tricky due to not being able to see the solder melt under the chip. Here are quick tips:

Start with a lower temperature (250-300°C).
Use a smaller nozzle.
Apply flux to aid solder flow.
Practice on scrap PCBs to get a feel.
Considering your concern, your old toaster oven could be a better choice. It offers more control and visibility during reflow. Give it a shot and monitor the solder.

I have used AiXun H310D hot air rework station

[Danny159]

Re: How to Reflow SMD with a Heat Gun

Hello, I also bought an Aixun 310D hot air station, it should arrive next week, are you satisfied with the station?