CFW for KSGER/Quicko STM32 Soldering Stations

[marck120]

I wanted to show you this video, it seemed interesting to me, the original power supply of the ksger has been replaced with a toroidal transformer, the rectifier bridge has been added, a capacitor to filter the current and a second optional switch.

[DavidAlfa]

Check soldering...

[nokin]

How are you wiring everything?

Hi, can you share me how to wire them correctly ? Thanks ! 

[moffet]

I ordered new 1.3" OLED screen from Aliexpress.
4pin, i2c.

[nokin]

I've destroyed c210 tip today, by setting C245 profile while using C210 tip. Heater's resistance is Mega ohms now.
I just want to test behaviour of control when switching handles without choosing corrected profile.
The c210 was ok before (except sleep function)

[marck120]

Sorry, on github it says that the 952 is not compatible:

T12-951, T12-952, T12-956, T12-959 use STC MCU, not supported by this firmware.

On the Aliexpress description however they say that the 952 is an STM32, why ?

https://it.aliexpress.com/item/32803295956.html

[DavidAlfa]

Checking some pictures in the feedback, it's clearly STC.

[marck120]

Checking some pictures in the feedback, it's clearly STC.

Thank you, from the photos how can you identify if it is an STM32 ?

I was fooled by the photo of a user on the Aliexpress review, on the chip I had read STM32:

[DavidAlfa]

That's a new version, unknown to me.
Just ask pictures to the seller.

[elektryk]

As stated earlier F030 is not compatible with this CFW.

[DavidAlfa]

Nope, no way the FW will fit in 32KB flash!

[marck120]

That's a new version, unknown to me.
Just ask pictures to the seller.

Thank you very much, besides the photo of the chip I thought there was another way to identify if a controller is STM32

[moffet]

Check soldering...

I solved the problem with the screen. Now I'm trying to calibrate everything using T12 tip (chinese one). The handle has an NTC build in, and it is enabled in the menu. The firmware is showing accurate ambient temperature in the upper right corner.
I started in Calibration->Settings. Set the Zero set (when the tip was cold), Cal 250°C, and stuck at 400°C.
Before the tip reaches 400°C (probably around 360°), the firmware aborts the operation with the ERROR DETECTED message.
I'm measuring the tip with a multimeter with a thermocouple.

Currently I have the following settings:
Zero set      612
Cal 250°C    2360
Cal 400°C    3960

Maybe the voltage offset of the amplifier is too big. It is unknown 621K amplifier.

[DavidAlfa]

Cal400 is too high, should be way lower than 4000 (4095 is the max. the stm32 can read), usually gets around 3000.
Is that an original board?

The gain seems too high (Normally the op-amp has 1K/249K resistors).
Or maybe the amplifier is bad, or you measured cal400 wrong.

[moffet]

This is the original board.
I see 39D (249kΩ) and 1kΩ resistors around the amplifier.

[ovis]

What would be the disadvantages of buying unit with segmented LED display (mm32) over the OLED (stm32). It has sleep, shutdown modes, temperature calibration and I like a simple display.

https://www.aliexpress.com/item/1005007597204295.html

[elektryk]

There is no option to individually calibrate the tip or switch profiles, which can sometimes be useful, not to mention other interesting settings.

[sst311212]

Currently I have the following settings:
Zero set      612
Cal 250°C    2360
Cal 400°C    3960

Maybe the voltage offset of the amplifier is too big. It is unknown 621K amplifier.

Your ZeroSet is too high, you may need change op-amp.
My ZeroSet is near 30 at 30°C with modded ksger gx board. (AD8605)

[moffet]

I just replaced the amplifier with the Texas Instruments OPA336NA and now Zero set is 11 insted of 612.
So if you have 621K amplifier, replace it.

[ladimir]

... Assuming I've traced the schematic properly (attached) and interpreted it properly, it looks like docking the iron on the stand causes pin PD1 to be pulled low.

Please consider some of my clarifications regarding the scheme
1. Usually in circuits smoothing capacitors have a nominal value 100nF (C6, C14, С15, C16)
2. U1 is missing contacts number 35 and 44.
3. U4 - TP1431A has a different pin numbering.