CFW for KSGER/Quicko STM32 Soldering Stations

[sevgiduvari_7]

David, u r are so coldhearted... he s from turkey, its like a whole 1year salary up there. why cant you work for free

I totally agree. Our ancestors said that even a broken clock is right twice a day.
1000 $ = 15000 tl
For 15000 TL, they eat here in a casino for 1 night with Russian friends.
Then they take you to the hotel.
I won't tell you what's next..
I don't know, could I explain? 

[sevgiduvari_7]

I don't know, maybe that's a language barrier/automated translation thing but the level of entitlement seems off the charts with this guy.

nope, thats actually how turkish are begging, its like national ability.

I think you have a tail pain from the Turks? 
tell me right?

[wickated]

friends.

nope. turks are not friends. we dont make friendship with mammals 

[DavidAlfa]

Jokes are great, but please keep the xenophobia and the offtopic away...

[ricktendo]

Hello David,

I recently purchased a KSGER OLED-v3.0 (printed on the board) and I would like to report the correct offset for me is 0 (zero,) can anybody else with a similar board confirm this, if so please set the default offset to zero.

[sevgiduvari_7]

Jokes are great, but please keep the xenophobia and the offtopic away...

I wasn't kidding, David.
Russians are famous in Turkey.
They take a lot to the hotel.
That's why they come on vacation.
Turkish things are sweet.

[sevgiduvari_7]

friends.

nope. turks are not friends. we dont make friendship with mammals 

what you suck is not breast!!!
you understand right?  

[MimCom]

The key for me was your new FAQ section where you mentioned that the ADC adjust happened in real time.

I've recently waded in and am attempting to decide which flavor of hardware to purchase.  FAQ link in DavidAlfa's sig leads to discussion of Hantek hackery.

Is there a T12/STM32 FAQ someplace?

TIA...

[ricktendo]

The key for me was your new FAQ section where you mentioned that the ADC adjust happened in real time.

I've recently waded in and am attempting to decide which flavor of hardware to purchase.  FAQ link in DavidAlfa's sig leads to discussion of Hantek hackery.

Is there a T12/STM32 FAQ someplace?

TIA...

Read this https://www.eevblog.com/forum/reviews/stm32-oled-digital-soldering-station-for-t12-handle/msg3802196/#msg3802196

[MimCom]

Thank you.  I still have couple of basic questions for which my searches here have yet to yield answers:

• Most of these stations are rated at 24V/3A.  I notice others rated 24V/5A.  Always nice to have some additional SOA, but are there relevant hardware differences besides the output stage upgrade?
• T12 cartridges seem to top out at 72W -- are there other cartridges that utilize some or all of the additional capacity?
• What about 5-pin versus 4-pin plugs?  Quicko seems to offer both, but KSGER uses 5-pin from what I can see.

[ygi]

As you say, T12 cartridges are limited to 72W so only stations that can fit a different handle and cartridge type (typically C245) benefit from the extra power. Though, do keep in mind Chinese specs are often way more flattering on paper than in reality so having 5A could help hitting the needed 3A.
The main difference between 4 and 5 pins is the possibility to have a NTC for cold junction compensation inside the handle. That is - supposedly - for better t° accuracy whereas 4 pins stations rely on the t° read from on-board sensor. With properly calibrated tips, a 4 pins station's still within 5°C (real vs set temperature). My guess is they added NTC so they could get away with cheaper components with every newer revision. All in all, both 4 and 5 pins work well enough in regard to temperature tracking.

[DavidAlfa]

FAQ = Github documentation.
I'm pretty happy with my Quicko 108W power supply. Definitely better than 75W ones.
Slightly struggled when I powered C245 tips with it, but did withstand the beating (200+W).

[MimCom]

Thanks.  Firmware fun comes next, once I get an order placed

We have a surplus of 24V 3A supplies here, and I'm leaning towards a Quicko 945 at this point.

What happens if we feed these things with 27 VDC?  3.3V buck converter would be the gating question.  Do also risk of overstressing the heating element, or will the PID take care of that?

[ygi]

27V might be pushing it for long term use. Small step down converters are dirt cheap and may even fit inside the case. Like this one: https://www.aliexpress.com/item/32711173698.html

[DavidAlfa]

27V? I ran it at 30V some years ago., no problem for the board itself, but these cheap tips are already overpowered
Yeah, the tip will warmup faster, but only internally, the thermal performance won't get any better, and the heater lifetime will be shortened.

[ricktendo]

Anybody with KSGER v3.x board also have this same issue?
While I have no tip inserted and the iron is pointing down (shake sensor open) it shows normal no tip error, but if I tilt iron up (shake sensor closed) along with the no tip error gif it displays these random temps (click HD on GIF player for better view)

https://gfycat.com/personalenergeticdipper

Issue seems to be related to the ball/mercury switch, when circuit is closed (iron pointing up with no tip) is the only time the screen does that.

P.S. If somebody can tell me what Offset you use on your 3.x station to get the OLED straight, mine is 0 offset.

[wickated]

Anybody with KSGER v3.x board also have this same issue?
While I have no tip inserted and the iron is pointing down (shake sensor open) it shows normal no tip error, but if I tilt iron up (shake sensor closed) along with the no tip error gif it displays these random temps (click HD on GIF player for better view)

https://gfycat.com/personalenergeticdipper

Issue seems to be related to the ball/mercury switch, when circuit is closed (iron pointing up with no tip) is the only time the screen does that.

P.S. If somebody can tell me what Offset you use on your 3.x station to get the OLED straight, mine is 0 offset.

u just raise signal lvl so system counts it as temp. when shaky is closed current flows from cpu not only to ground directly but also to op input. u should recalibrate zero offset with shaky closed.

[ricktendo]

u just raise signal lvl so system counts it as temp. when shaky is closed current flows from cpu not only to ground directly but also to op input. u should recalibrate zero offset with shaky closed.

Maybe I should not have included the zero offset question, I was referring to display offset (which by default is set to 2 but for me the best offset is 0)

Can you tell me what zero offset you are referring to and what setting do I use to change signal level?

[ygi]

He meant the calibration thing where you capture the ADC value with a cold tip. According to his idea, shake sensor would allow current to pass through opamp when closed. That noise would then be mistaken as temperature reading. My v1.5 doesn't do that but it's a different design from your v3.

[wickated]

this here. presence io has 4,7k res, opa input also has 4,7k, so if shaky is only voltage on tip it would affect temp reading.

[DavidAlfa]

How? The 4.7K resistor is pulled to ground, has nothing to do with the temperature circuitry.
Recently someone told me the tip temperature drifted 1°C when moving the handle.
I can't figure out why it does that, maybe a poor board design, ADCs are very sensitive.
Never had that issue with my Quicko, it's really weird.

[wickated]

Recently someone told me the tip temperature drifted 1°C when moving the handle.

noticed similar, declared its just air cooling. on jbc tips outer casing is very sensitive to airflow, and can sense even finger touch on cold tip.

[wickated]

How? The 4.7K resistor is pulled to ground, has nothing to do with the temperature circuitry.

sure, i just forgot circuitry
painted some wiring.
forgot to dwaw switch on S pin

[DavidAlfa]

Did you know ther're plenty of colors to choose?
What's that blue resistor? It's between the same wire, wont do anything.

The shake/NTC go to GND. There's no way they can inject current into the amplifier.

[wickated]

Did you know ther're plenty of colors to choose?
What's that blue resistor? It's between the same wire, wont do anything.

The shake/NTC go to GND. There's no way they can inject current into the amplifier.

no i dont. im colorblind 
res is heater in t12
tc also goes to ground, so applying some voltage on tc "ground" end would also result in voltage on opa input.