I am a lonely man today. I had to take my 2x4 to Rasta Hospital for minor surgery last night and it ended up needing to admitted lol. RBT fixed a faulty potentiometer. Then added an on-board voltmeter so I can give more accurate data to him in regards to battery charge and discharge. Hopefully it will be home soon. He let me snap a pic while he was working last night but he made me hide part of the heater to keep you all guessing and wanting more lol.
MrPeanut it was nice to spend some time with you and the 2x4 as always. Although it was a painful lesson I will be sure to add the pot to the list of component level testing to avoid this mix-up in production. I did manage to find one pot with the right resistance in a box in the prototype lab so we are back up and running. In production this part will be sourced in triplicate so we will have two back-ups for this and other critical components but his is a clear reminder of why redundancy is important in your supply chain.
In reviewing the unit with you I was pleased to see that the double screen design with the ultra fine mesh kept the heater compartment squeaky clean after that much use. It is amazing how free flowing that screen is given how tight the mesh is hah? Although painful it did give me reason to play a bit with the potentiometer and fixed resistor to trial being able to custom tune heaters to have the full dial of adjustment over a narrow temperature range. In future designs this would customers a range of swappable heaters depending on their needs.
Given that that this unit used less than optimum assembly practices, sub optimum wire, was baked at 200F and was ran at 2 times voltage for multiple full battery drains and then was put to task by you I am surprised that it is as robust as it has been.... oh yeh we you did the drop test on it several times lol.
I hate to have you without a vaporizer given combustion is your alterative so FC and let me know when you have time to stop down and pick it up. I do appreciate all the data that you have gathered so far as it has already improved the next generation currently being fabricated. Your accelerated use will give us insight into failures that will happen in years in a matter of months. I look forward to your continued torturing of the 2x4s as you are findings are like gold in this "find and fix" phase.