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Topic: My HAKKO classic and T12/T15 soldering controller (Read 324717 times) previous topic - next topic

Re: My HAKKO classic and T12/T15 soldering controller

Reply #120 –
Yes, exactly.

Re: My HAKKO classic and T12/T15 soldering controller

Reply #122 –
Thanks.

So, this comfims my initial idea of where the thermocouple is. But I still cannot explain to myself why the TC voltage is available on both C1 to C3 and C2 to C3 terminals. Moreover - when C1-C3 are shorted with a piece of wire, the voltage between C2 and C3 also disappears, and vice versa. This means the it is indeed one thermocouple, but I still cannot figure out how can this be possible looking at the picrtures and the patent.

Re: My HAKKO classic and T12/T15 soldering controller

Reply #123 –
Is it problem for controlling multiple tips with one psu? We can read temperature on C2-C3 pins?

Re: My HAKKO classic and T12/T15 soldering controller

Reply #124 –
You must at least have switches for both + and - of each tip. I cannot imagine other way.

Re: My HAKKO classic and T12/T15 soldering controller

Reply #125 –
I see it, thanks.

Re: My HAKKO classic and T12/T15 soldering controller

Reply #126 –
Firstly a big thanks to sparkybg for sharing, awesome project and it's saved me a heap of time doing R&D on an iron controller of my own. So I am busy acquiring the bits to build one of these. I am also thinking of getting a Hakko iron to use with it. (Eventually a JBC but as pointed out they have pricey tips).

I was thinking a Genuine handle and Chinese tips, comments please ....

Also are the T12 and T15 tips interchangeable ? What's the difference ? T15 is EU and North America only, is the difference as simple as the restriction of use of a material in the tip.

Thanks.
Cam.

Re: My HAKKO classic and T12/T15 soldering controller

Reply #127 –
As far as I know, there is no difference between T12 and T15 tips. You can also use PACE TD100, but the coefficients of the PID must be changed.

You can also get chinese FX-9501 handle for T12/T15. These are good enough.

Don't buy chinese FM-2027/28 - total crap!

Re: My HAKKO classic and T12/T15 soldering controller

Reply #128 –
Excellent thanks for the info just what I was after. I take it the usual sources eBay and AliExpress are the places to browse ?

Out of interest how have you been tuning the PID parameters on the V1 of the controller. Just using the LED display for feedback or do you have a sneaky way of graphing the output ?

Cam.

Re: My HAKKO classic and T12/T15 soldering controller

Reply #129 –
Just using the LED display. :)

And, just using a cotton piece with isopropil alcohol to be able to coll down the tip faster.

It is a bit slow and tricky process. :)

I am now working on V3. It has isolated USB, 2 channels for heaters, 2 sensor inputs that can be inverted and/or used as single differential input, and connected freely, and  a separate input for shunt resistor. However, it became much more complicated, and routing 3-4 times more parts on the same PCBs was a little nightmare. :) I am still working on the back PCB.
This version will also be able to control JBC microtweezers.

...but I think it will cost me some months to complete. The PCB assembly alone will cost me 10-12 hours to complete.

Re: My HAKKO classic and T12/T15 soldering controller

Reply #130 –
Thanks for the PID tips. I see pins 27 (PGC) and 28 (PGD) are also available for TXD2 and RXD2 so graphing is a possibility without altering the PCB.

Sounds like V3 is going to be the controller to end them all. I can't wait to see how you have tackled the various design choices and problems.

Cam.

Re: My HAKKO classic and T12/T15 soldering controller

Reply #131 –
As I am about to order the bits to make one of these I thought I may as well post the BOMs for the benefit of others with links to components on the Farnell UK website (my preferred supplier). Note they are untested BOMs at this stage, use at your own risk etc.

Cam.

Re: My HAKKO classic and T12/T15 soldering controller

Reply #132 –
UPDATE: New version of front firmware is uploaded in post#2. A friend reported a problems with low brightness - the controller was not able to detect mains voltage when low brightness (under 3) is selected, and is constantly restarting after the first attempt to set brightness under 3. This is corrected now.

Re: My HAKKO classic and T12/T15 soldering controller

Reply #133 –
Soon there will be a new version. The most universal I can think of.
- Isolated USB connection (HID class) for firmware updates, live data, and PID tunning.
- Will be able to recognize unlimited number of instruments - can read resistor, 1-wire EEPROM or 1-wire MCU in the connector or handle. When MCU is used in the handle, it will be able to read the temperature in the handle also, for the best possible accuracy.
- Will be able to control 2 heaters simultaneously, for microtweezers of any kind.
- Will be able to read any TC or resistive (PTC,NTC) sensor, linear or not.
- Sensor input can be wired freely, can be inverted or wired in differential configuration.
- 2 sensor inputs have separate 4uA - 16mA precise current sources for resistive measurements.
- Will be able to work with any voltage between 10 and 24 volts, AC or DC
- OLED display option, for more information and better user interface on the station.

Unfortunately it became pretty complex, and not so cheap, but still much cheaper than many OEM controllers. I have just finished the PCBs. I will open a new thread when I have a working prototype.

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Re: My HAKKO classic and T12/T15 soldering controller

Reply #134 –
This is going to be the controller to end them all. Can't wait to get my hands on one. Can you tell me does it still have the PGA in the front end that you mentioned earlier ?

Cam.