![reflow oven reflow oven](https://www.goldlandsmt.com/wp-content/uploads/2022/05/N610040786AA-panasonic-NPM-Nozzle-225-CSN副本3.jpg)
As I see it the small fan must have been an afterthought trying to compensate for the lack of cold-junction compensation. Replacing the TC interface with a more robust one will definitely make it possible to ditch the small fan completely. The annoying part about the TC interface they did is that it won’t measure negative delta, so you will always read _at_least_ the controller board temperature. Everything is pretty much quiet until the last 30 seconds or so when it really has to work hard (and fail) to maintain my cooling curve as can be seen in the graph. It reaches 45C after repeated cycling of the lead-free profile but that’s about it. Here’s a trick for you if you think it’s too loud: When you have cold-junction compensation installed you don’t really need that noisy small fan running as the board actually isn’t getting hot.
#Reflow oven full#
I’m assuming this new firmware solves the stupidity with the button-polling in the native firmware, but it’s still too restrictive an interface for me, not to mention lack of logging…ĭave Jones of EEVBlog fame always says “Don’t turn it on, take it apart”, and that was indeed the first thing I did before turning this one on as I had a suspicion that it would full of masking tape – and of course it was! Having read it was obvious something had to be done.
#Reflow oven install#
Being able to PWM the built-in fan would make that radically easier.įinally, I’d want to permanently install an ft232 (or BT?) on that UART so I can just load up a serial terminal to drive the thing. I’ve resorted to putting a separate fan behind the unit to and carefully adjusting the distance to get enough airflow moving without screwing up the ability of the system to heat up. Without that kind of airflow, the heat applied to boards is *extremely* uneven. The next thing would be to utilize the firmware framework to add PWM to the cooling fan so that it can sustain a low airflow through the oven cavity. I should be able to hook a dryer duct to the back of the unit and exhaust everything outside, but not without reversing the fan.
![reflow oven reflow oven](https://www.electroparts.ltd.uk/wp-content/uploads/europlacer-content-5-scaled.jpg)
It’s absolutely stupid that the cooling fan pushes air through the unit and out the bottom, because that also pushes the fumes out the same way. There are a lot of changes I want to make to the unit, and now that somebody’s done the base work of tracking down all the pins there’s a lot of enhancements that could be made:įirst off would be to get deep enough into it to reverse the flow of the cooling fan. I’ll have to keep this in mind for next time I need to use my oven. Posted in Repair Hacks, Slider, Tool Hacks Tagged firmware, reflow, reflow controller, reflow oven, T-962, tool Post navigation
![reflow oven reflow oven](http://www.ibesmt.com/img/warranty.gif)
A much better solution than ripping out the controller and replacing it with a custom one.
#Reflow oven update#
The temperature sensor is placed right next to the terminal block for the thermocouples for proper temperature sensing.Īll the details of updating the firmware appear on a wiki, and the only thing required to update the firmware is a serial/USB/UART converter. The controller sits on top of an oven with two TRIACs nearby, so this isn’t the case, making the temperature calibration of the oven slightly terrible.Īfter poking around the board, found an LPC2000-series microcontroller and a spare GPIO pin for a 1-wire temperature sensor. The new firmware uses the existing hardware and adds a very necessary modification: stock, the oven makes the assumption that the cold-junction of the thermocouples is at 20☌. This is not in true hacker fashion – there’s already a microcontroller and display on the board. bought his T-962A even after seeing some of the negative reviews that suggested replacing the existing controller and display. It’s open source, and the only thing you need to update your oven is a TTL/UART interface. The controller for this oven is downright terrible, and has been working on a replacement firmware for the horribly broken one provided with this oven. It’s pretty cheap, and therefore popular, and the construction actually isn’t abysmal. The T-962A is a very popular reflow oven available through the usual kinda-shady retail channels.