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Messages - hugburger

16
Project logs / Re: Really universal soldering controller
Hello sparkybg,

It's good to see you back around here again

I had a quick look and it might be this?

Allright, Iwanuska worked his magic once more :)

Here's the latest firmware version, let's call it the "Easter Edition". This one has an added menu for the "resume from deep sleep" option:

1) OFF: Resume from deep sleep by power cycle only
2) KEY: Resume from deep sleep by menu button long press only
3) AUTO: Resume from deep sleep by taking iron from stand only

Enjoy!

https://drive.google.com/open?id=1q5LqtigQH5kIK-gbxfwhOodKX0396wtb
17
Project logs / Re: Really universal soldering controller
I have attempted to characterise the response of the C245 thermocouple at the request of mooshoomatt.

Method:

T245 handle connected to unisolder with C245-768 cartridge was clamped in place
C245-937 cartridge was clamped in place so both tips are touching
A solder blob was added as a thermal bridge between the cartridges
Multimeter positive lead was connected to core connection of C245-937 cartridge
Multimeter negative lead was connected to outer shell connection of C245-937 cartridge
Power supply positive lead was connected to core connection of C245-937 cartridge
Power supply negative lead was connected to middle sleeve connection of C245-937 cartridge

Unisolder was turned on and set to test temperature
Power supply was turned on at 12V 5A briefly to heat soak C245-937 cartridge
Multimeter displayed value in mV was allowed to fall until it reached steady state
Value was recorded

Unisolder Temp (°C),   mV
150   2.49
170   2.85
188   3.18
200   3.33
220   3.68
240   4.04
260   4.38
280   4.74
300   5.09
320   5.47
350   5.99
380   6.51

I repeated first few temperature points with ~18 hour difference, multimeter readings all within within 0.06mV
Readings are quite linear but don't appear to match standard thermocouples
Needs to repeat with different cartridges to confirm

Questions / feedback welcome
18
Project logs / Re: Really universal soldering controller
Greatscott didn't check the core to sleeve resistance (also 0R), otherwise he might have realized he is actually passing current through the TC junction.

I've attached a cutaway of a 245 cartridge that should make things clear.

Also here is the connection direections from sparkybg:

3. JBC C245:
 - Outer shell (green wire) connected to (mains)EARTH and SENSEB
 - Heater positive(red wire) connected to Vout1- and SENSEA
 - Heater negative(blue wire) connected to Vout1+
 - 150ohm between ID and Vout1-
 - 5.6k between ID and Vout2-
22
Project logs / Re: Really universal soldering controller
Thanks! I'm still tweaking some things but the core is for the most part done.

Does anyone know if we can bump up the max power for the T245? I know it's currently configured to 130 Watts but was wondering if there was any reason from bumping it up to 150 or 160. I currently have a 160 VA transformer.


The maximum output current in the firmware is 6A (found in PID.c) @ 24V = 144 Watts, so if you want to set profile above that you will have to change code slightly

I have 160VA transformer too and would offer to test, but I'm not sure about process to build hex if you need XC32 v1.33 compiler (paid)?
24
Project logs / Re: Really universal soldering controller
whether there is a possibility of using two irons at the same time

1  x C245  and 1 x C210

Yes that appears to be possible

The controller is made to control single instrument with one or two heaters. The heaters can be different (iron profile in the firmware has separate part for each heater), but they are always driven with the same temperature and in the same time.

However I can only see 1 variable for max power in iron.c so your profile will likely be either very overpowered for C210 or very underpowered for C245