I tuned the profile to work with lead free solder. Attached is my profile. Tested one board at a time. None of the default profiles worked with my lead free solder. I got a good balance between solder reflow, and my connectors not getting too brown from getting baked.I then loaded up the oven with 12 boards, and none of them reflowed properly. I was able to save them by reflowing the boards in smaller batches, but the fact that the oven's ability to reflow is sensitive to the number of boards is not good.Also, the "done" buzzer is very annoying and loud.This oven works, and if you need to make a few boards it will get the job done. If you need more than that, then you need to make some modifications or buy a more expensive oven.
Customer Service Reply:
Dear customer ,
Sorry for the inconvenience has caused to you .
You can contact customer service for support, and we are always working on improving product quality.
Any questions,welcome to contact us !
Best regards,
VEVOR TEAM