Alan Hawse from IOT Expert writes, “About 2 years ago, I bought a Qinsi QS5100 reflow oven from China via Amazon.com. My decision was based almost completely on the nice youtube video that Ian Lesnet from Dangerous Prototypes posted about his results. After I got the oven, I successfully built a series of Physics Lab boards with it. Then one day about a year ago, I got two boards in a row with horrible results which I attributed to the temperature profile. A few weeks later, I dug around on the internet and decided to change to the Lesnet profile and things seemed to be working again.”
More details at IOT Expert site.
Via the forum.