Author Topic: Yet another quasi-universal soldering station (aimed at JBC)  (Read 8877 times)

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Offline qm95533

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Re: Yet another quasi-universal soldering station (aimed at JBC)
« Reply #50 on: December 08, 2020, 07:04:40 am »
thanks for your guidance. It is now OK. I drew the PCB. Test after the purchased components arrive.
« Last Edit: December 08, 2020, 07:35:44 am by qm95533 »
 

Offline Anyzis

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Re: Yet another quasi-universal soldering station (aimed at JBC)
« Reply #51 on: December 08, 2020, 03:00:31 pm »
Great job! Can you share what the final enclosure/configuration you are aiming at?
 

Offline qm95533

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Re: Yet another quasi-universal soldering station (aimed at JBC)
« Reply #52 on: December 08, 2020, 03:34:24 pm »
Please send me your email
 

Offline andrey1042

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Re: Yet another quasi-universal soldering station (aimed at JBC)
« Reply #53 on: December 08, 2020, 04:04:04 pm »
Hello! A very good project! Redrawn the circuit and printed circuit board Dip Trace v4.0.0.2. DC1 https://item.taobao.com/item.htm?id=626409483300&toSite=main&toSite=main
 
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Offline Anyzis

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Re: Yet another quasi-universal soldering station (aimed at JBC)
« Reply #54 on: December 08, 2020, 08:27:06 pm »
Hello! A very good project! Redrawn the circuit and printed circuit board Dip Trace v4.0.0.2. DC1 https://item.taobao.com/item.htm?id=626409483300&toSite=main&toSite=main
Респект! I like the standalone Atmega and optos on the sense inputs!
 

Offline qm95533

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Re: Yet another quasi-universal soldering station (aimed at JBC)
« Reply #55 on: December 08, 2020, 11:15:52 pm »
I have been sent to your mailbox
 

Offline qm95533

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Re: Yet another quasi-universal soldering station (aimed at JBC)
« Reply #56 on: December 10, 2020, 04:03:47 pm »
Now there is a new problem. The temperature displayed is 300 degrees, but actually only 250 degrees. The temperature displayed is 400 degrees, which is actually only 350 degrees. There is a temperature difference of 50 degrees. How should the temperature be accurate?
 

Offline Anyzis

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Re: Yet another quasi-universal soldering station (aimed at JBC)
« Reply #57 on: December 10, 2020, 08:45:07 pm »
For me it was accurate to 3 degrees or so. Two things come to mind:
1. ADS1118 does not read ambient temperature correctly (channel with no iron should show the room temp)
2. Your cartridges are not original JBC and have slightly different thermocouples inside. You can account for that by adjusting second parameter in default profile in 3_iron file:
Code: [Select]
const TProfile defaultProfiles[] = {
  { "No tool",
    0, 0, 0,
    0, 0, 0,
    0
  },
  { "T245",
    41, 0.5, 80,
    4, 0.5, 0.3,
    150
  }
};
41 is the default coefficient in degrees/mV. Try changing it to 35 or so, adjust by experimenting.

Full format of the profile for reference:
Code: [Select]
struct TProfile {
  char name[8];
  float coef; // thermocouple coefficient in C/mV
  float smoothing; // derivative smoothing coefficient to prevent output noise
  float rateLimit; // allows throttling of temperature rising rate
  float kP, kI, kD;
  float nominalPower; // Could be used for iron identification
};
 
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Offline qm95533

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Re: Yet another quasi-universal soldering station (aimed at JBC)
« Reply #58 on: December 11, 2020, 01:27:10 pm »
thank you for your reply.  I will test it in two days.  Now my 8293 is damaged.  I have to re-purchase 8293, the new 8293 will arrive in 2 days.  I don't know what caused the damage, it may be due to static electricity.  I am modifying the workbench to eliminate static electricity.
 

Offline jhs

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Re: Yet another quasi-universal soldering station (aimed at JBC)
« Reply #59 on: December 12, 2020, 06:09:36 am »
Hello, through your help, my welding machine work.
However, there is a problem please teach you, have low pressure limit the soldering station? Power supply voltage is lower than 18 v will not work.
You can use the 12 v power supply? How to implement the 12 v
 

Offline Anyzis

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Re: Yet another quasi-universal soldering station (aimed at JBC)
« Reply #60 on: December 12, 2020, 10:49:20 am »
Hello, through your help, my welding machine work.
However, there is a problem please teach you, have low pressure limit the soldering station? Power supply voltage is lower than 18 v will not work.
You can use the 12 v power supply? How to implement the 12 v
If I understand you correctly, you want to limit output power and also make it work off a 12V supply?
Current algorithm does not limit output power but instead limits the rate of temperature rise (see my post above). By default it's 80 degrees per second. That way if you connect a very small but high powered tip, the station should automatically adapt power output not to fry the heater.
Regarding 12V - I haven't tried it. In principe it should work without modifications - logic and input circuitry works from 5V and the only high voltage part is the power switch, which is designed for 12V-28V operation. However with 12V supply and a C245 cartridge you will only get 12V^2/3 ~ 48W theoretical maximum power output. C210 or C105 might be OK but I don't have those so can't comment.
 

Offline Anyzis

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Re: Yet another quasi-universal soldering station (aimed at JBC)
« Reply #61 on: December 12, 2020, 10:51:44 am »
thank you for your reply.  I will test it in two days.  Now my 8293 is damaged.  I have to re-purchase 8293, the new 8293 will arrive in 2 days.  I don't know what caused the damage, it may be due to static electricity.  I am modifying the workbench to eliminate static electricity.
Strange, I haven't had a single failure. Check if R8-R11 are at least 5k. If they are lower, you will definitely overload their input.
 

Offline jhs

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Re: Yet another quasi-universal soldering station (aimed at JBC)
« Reply #62 on: December 13, 2020, 12:11:27 pm »
Thank you very much for your prompt reply, I use two VN5E010AH VND5T016 instead.
I test today must work more than 22 v mains voltage, less than 22 v does not work.
I connection between 5 feet and 5 v VCC 7.5 K pull-up resistors, can work in 9-24 v normal, (see chart). I don't know why is this? I can do to work long hours? I'm going to use JBC C210 a group, and a group C245, so so 2 VN5E010AH. I hope you help.
thank you
 

Offline Anyzis

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Re: Yet another quasi-universal soldering station (aimed at JBC)
« Reply #63 on: December 13, 2020, 08:07:54 pm »
Thank you very much for your prompt reply, I use two VN5E010AH VND5T016 instead.
I test today must work more than 22 v mains voltage, less than 22 v does not work.
I connection between 5 feet and 5 v VCC 7.5 K pull-up resistors, can work in 9-24 v normal, (see chart). I don't know why is this? I can do to work long hours? I'm going to use JBC C210 a group, and a group C245, so so 2 VN5E010AH. I hope you help.
thank you

OK I thought about it and it has probably to to with incorrect detection of power. That's why when you connect a pullup resistor, you cheat the station into thinking there is a more powerful cartridge connected.

Problem is in cartridge detection algorithm in 3_iron file:
Code: [Select]
      if (mVolts[chNum] < DC_THRESHOLD) {
        // Prevents smoothing of very high DC adc value
        avgTemp.first = true;
        measurePower(chNum);
        // more elaborate profile selection should be implemented
        if (measuredPower[chNum] > 100 && measuredPower[chNum] < 300) {
          // Defaults to Halted, if not - will automatically resume operation
          loadProfile(1);
          state = Halted;
          station.tick(chNum);
        }
      }
It expects output power of at least 100W, which is obviously not the case with 12V supply. You should adapt this algorithm for your needs.

Also, since your voltage will be lower and you use a different switching IC, you need to change these two lines in globals.h:
Code: [Select]
// Specific to the supply at hand and VND device used
#define HEATER_VOLTAGE 23.5
// DS specifies K at at 5000 but with large uncertainty. Has to be calibrated with a known load.
#define CSENSE_COEF 4.8

And if you want to use both C210 and C245 with the same station, you will need some more work:
1. Adjust existing C245 profile in 3_iron for lower power (12V)
2. Create a new profile for C210 (including PID parameters)
3. Modify the detection algorithm (above) to correctly detect different cartridges by measured power.

But I don't understand why you want to use C245 tips with 12V since you will only get ~1/4 the power? I suggest to stick with 24V and just limit output power for C210. And I will not be able to help you much since I don't have a C210 tip. For profile creation and PID tuning you will definintely need to use telemetry and real time plotting of data (Arduino can do that too).
 

Offline Apostolos

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Re: Yet another quasi-universal soldering station (aimed at JBC)
« Reply #64 on: December 16, 2020, 08:06:29 am »
Hi again.  Unfortunately  I  had an accident with a troubled step down module and both of AD8293G160  have been destroyed. Till now I cannot find a reliable supplier with short delivery time. Could you help me by suggesting another solution?  Maybe  an alternative amplifier from ( FARNELL, MOUSER,TME,RS). Thanks a lot.
 

Offline Anyzis

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Re: Yet another quasi-universal soldering station (aimed at JBC)
« Reply #65 on: December 16, 2020, 11:44:51 am »
Hi again.  Unfortunately  I  had an accident with a troubled step down module and both of AD8293G160  have been destroyed. Till now I cannot find a reliable supplier with short delivery time. Could you help me by suggesting another solution?  Maybe  an alternative amplifier from ( FARNELL, MOUSER,TME,RS). Thanks a lot.
I ordered from Farnell but they seem to be out of stock. Mouser seems to have some in stock. You can also try AD8293G80, just adjust multiplication constants in the code (gain is 80 instead of 160).
There are many instrumentation amplifiers that could be used (<150uV offset and rail-rail operation) but you will need to redesign the PCB. I used these because they are very cheap and have fixed gain (no need to use high precision resistors).
 

Offline Apostolos

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Re: Yet another quasi-universal soldering station (aimed at JBC)
« Reply #66 on: December 16, 2020, 12:14:46 pm »
 I appreciate your immediate answer ,I’m going to try AD8293G80. Can you help where can I find these constants in the code ?  Thanks again.
 

Offline qm95533

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Re: Yet another quasi-universal soldering station (aimed at JBC)
« Reply #67 on: December 17, 2020, 09:28:19 am »
Hello, now this one I made is basically ready for use. After changing the temperature coefficient, it now looks like plus or minus 3 degrees. I am still testing. I upload some pictures. All holes are made by hand, so some are not good-looking.


I made a video.
https://youtu.be/R3Fq-tIpHew
 

Offline qm95533

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Re: Yet another quasi-universal soldering station (aimed at JBC)
« Reply #68 on: December 17, 2020, 09:33:16 am »
I took some pictures
 

Offline qm95533

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Re: Yet another quasi-universal soldering station (aimed at JBC)
« Reply #69 on: December 17, 2020, 09:34:41 am »
I took some pictures
 
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Offline qm95533

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Re: Yet another quasi-universal soldering station (aimed at JBC)
« Reply #70 on: December 17, 2020, 09:35:26 am »
I took some pictures
 
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Offline Anyzis

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Re: Yet another quasi-universal soldering station (aimed at JBC)
« Reply #71 on: December 17, 2020, 08:58:37 pm »
I appreciate your immediate answer ,I’m going to try AD8293G80. Can you help where can I find these constants in the code ?  Thanks again.
3_iron, line 107:
Code: [Select]
      temp = avgTemp.push(mVolts[chNum] * profile.coef / 160.0)  + ambTemp;Change 160 to 80
 
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Offline Anyzis

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Re: Yet another quasi-universal soldering station (aimed at JBC)
« Reply #72 on: December 17, 2020, 09:03:45 pm »
Hello, now this one I made is basically ready for use. After changing the temperature coefficient, it now looks like plus or minus 3 degrees. I am still testing. I upload some pictures. All holes are made by hand, so some are not good-looking.


I made a video.
https://youtu.be/R3Fq-tIpHew

Great job! I love the clean wiring inside. Glad you found this design useful!
 
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Offline Free_WiFi

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Re: Yet another quasi-universal soldering station (aimed at JBC)
« Reply #73 on: January 24, 2021, 07:36:21 pm »
Великолепно !!! Мeraviglioso !!!
 


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