CFW for KSGER/Quicko STM32 Soldering Stations

[DavidAlfa]

I've been playing with the pid/filter values. They're made for the default PWM/ADC frequency (200ms).
Everything affect everything, tunning the system takes a hell of an effort, but eventually it can behave great.
I get almost square response, with only 3-5ºC over shoot for 1/2-1 second, works with almost all tips.
I must mention that's with used tips which aren't so noisy. Probably will go crazy with new tips (Tip: Set Imax very low or close to 0 for new tips).
This is shows how filtering, pid and tips are extremely linked together.
Settings that worked with new tips became unstable as they aged up.
I don't know how this settings behave with new tips.

FILTER MENU:
- Filter: 75%
- Threshold: 40
- Count limit: 0
- Step down: -3%
- Min: 40%
- Reset limit: 600

PID:
- Kp: 55.00
- Ki: 110.00
- Kd: 8.00
- Imax: 0.75
- Imin: 0.00

[Polf]

What I don't like at all is the shake sensor. While doing a longer solder job I had to really shake the handpiece several times to make the station wake up. I've now disabled the filter for the sensor in the settings and I hope it is more sensitive now.

The motion sensor should be closed when the soldering iron handle is turned down. In some soldering iron handles, the opposite happens.
Perhaps the reason is this.

[Polf]

What I don't like at all is the shake sensor. While doing a longer solder job I had to really shake the handpiece several times to make the station wake up. I've now disabled the filter for the sensor in the settings and I hope it is more sensitive now.

I checked too.
Profile T12, firmware Oct 19 2021. In the menu System the Filter is ON. Awakening from the motion sensor occurs only by shaking it several times with a soldering iron. With Filter OFF, the wake-up occurs immediately after changing the position of the soldering iron.
The motion sensor is closed if the handle is turned down.

[M-Reimer]

I'll give this a try for some time with the filter disabled, but I've now also ordered the handle with the shorter "hand to tip distance" and the corresponding iron stand. I guess there are several ways to mod this stand to have a switch added which is triggered with the iron weight.

After all I think that adding a switch is more work (as this is not the stock configuration and the sensor is already built into most handles) but it is still the better way to do it. In this case I actually don't need any timeout at all. If the iron is in its stand the station can go to "sleep" immediately. Probably (if possible) I'll enable the filter in this case to filter out contact bounce from the stand switch.

[ygi]

Pretty sure stand mode tracks whether the sensor/switch is in on or off state whereas shake mode resets timer every time there's a change in state (going from on to off or off to on). Replacing the tilt switch - that's quite honestly unfit for the job - with an actual vibration switch might be a good solution too. Though, picking one with the "perfect" sensitivity may be a challenge.

[DavidAlfa]

Correct. As the name suggest, Shake mode reacts to any change.

[wickated]

After all I think that adding a switch is more work

if u bought stand of this type all "work" is wrapping 1 wire to stand

[ricktendo]

if u bought stand of this type all "work" is wrapping 1 wire to stand

I assume you also have to ground the handle, and the wire to the stand would be the switch wire?

P.S. anybody actually test these power supplies to verify if the indeed rated for 24V 5A?

https://www.aliexpress.com/item/32854397476.html

[Polf]

Why test them? For T12, 4 Amperes is enough, so this power supply will do. But for JBC C245 even 6 Amperes is not enough.

[mastershake]

ive used this one when i needed to replace the ksger one that blew up before has been working without issues https://www.aliexpress.com/item/33037808888.html?spm=a2g0o.cart.0.0.70fa3c00VjJiPp&mp=1

https://www.aliexpress.com/item/32998949310.html?spm=a2g0o.detail.1000014.4.f5993261hcALF1&gps-id=pcDetailBottomMoreOtherSeller&scm=1007.33416.213724.0&scm_id=1007.33416.213724.0&scm-url=1007.33416.213724.0&pvid=a4eea926-c658-4972-87ac-986a6c2ac388&_t=gps-id:pcDetailBottomMoreOtherSeller,scm-url:1007.33416.213724.0,pvid:a4eea926-c658-4972-87ac-986a6c2ac388,tpp_buckets:668%232846%238114%231999&&pdp_ext_f=%7B"sceneId":"23416","sku_id":"66978618242"%7D

[ricktendo]

Hi David, is there any particular reason why the encoder is set to REV by default?

[DavidAlfa]

It shouldn't... Does it use that value after resetting defaults?

[ricktendo]

It shouldn't... Does it use that value after resetting defaults?

Yes, on clean install after total chip erase and also after reset all. It occurs in both KSGER 1.5 and 2.x builds.

[DavidAlfa]

I renamed the typedef labels, as "mode_Zero" and "mode_One" made little sense, to "Mode_Reverse", "Mod_Forward".
Obviously, did it wrong, renaming mode One(Forward) to reverse
I have very little time for testing! I'm a mess

[M-Reimer]

Just out of curiosity: How big would a power supply have to be to drive a JBC C245?

And how would it be wired into the T12 controller? I think I've read somewhere that it can't just be connected to the T12 connector but needs a modification to separate the thermocouple sensing, right? Can the existing FET handle the increased current or would I have to replace it? How do you handle the missing NTC? Or does the C245 handle actually have a NTC inside it?

[Polf]

Just out of curiosity: How big would a power supply have to be to drive a JBC C245?

And how would it be wired into the T12 controller? I think I've read somewhere that it can't just be connected to the T12 connector but needs a modification to separate the thermocouple sensing, right? Can the existing FET handle the increased current or would I have to replace it? How do you handle the missing NTC? Or does the C245 handle actually have a NTC inside it?

I first connected the 6 Ampere power supply unit (tested, it actually gives out 6 Amperes), but this is not enough, the power supply protection is triggered. Then I plugged in the 12.5 Amp power supply, it works well.
The T12 thermocouple is connected in series with the heater, the C245 has a separate thermocouple lead, therefore, for example, the KSGER controller v. 2.1s has a jumper that needs to be switched to use the JBC tips. As in other controllers, I don't know.
In the KSGER controller in v. 2.1s installed MOSFET TPC8107 with a maximum drain current of 13 Amperes. The C245 heater has a resistance > 2 Ohms, so the current through it cannot exceed 12 amperes. Therefore, there is no need to replace MOSFET. I use homemade controllers similar to KSGER v. 2.1s, but MOSFET installed IRF9310, which has a maximum drain current of 20 Amps.

[DavidAlfa]

Quicko (not quecoo) handles it fine.
The 108W (Actually 120W design) power supply drops to ~20V,  but else than that, it doesn't overheat or shutdown, seems to limit the current to ~7.5A.
The AOD403 mosfet handles >55A (70A at 25°C), 200A pulsed.
It needs a small modification which can be seen in the schematics folder on github.

[hanzz]

...found some Original Backups even Ksger 3.1

Not tested by me!

[ygi]

I can't imagine someone ever wanting to downgrade back to ksger's firmware though.

[dark_hawk]

Suddenly most of my tips are behaving very erratically. All expect one! Some of them used to work fine without adjusting anything. And some are not barley used although not new.
I think something is wrong with my board. Where should I start looking?
I have a ksger v3.1. I was using an older version of the firmware, and just updated to the new version but it's the same behavior. The board powers the tip for a second, it overshoots 100 degrees and slowly comes down to continue the cycle.

Edit: The one tip that worked, looks like after a few minutes of operation the behavior is exactly like the other tips.


Looks very similar to this board from David's github:

[wickated]

I can't imagine someone ever wanting to downgrade back to ksger's firmware though.

only needed when u use 2.1s with solder pump attachment board. but actually who uses desolder guns? cost like a truck, work only a bit better then copper braid wire.

[DavidAlfa]

Don't forget the handle, the contacts can wear out or corrode.
I guess you already tried Factory reset?

...found some Original Backups even Ksger 3.1

Not tested by me!

Are they different from the ones in github?

[dark_hawk]

Yes. And I also tried an unused new handle. Same problem.

[wickated]

and what about opamp?

[dark_hawk]

If you mean the 8551 SOT23-5, I didn't check it, don't know how, and don't have a replacement for it.