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Messages - jry

19
Project logs / Re: My HAKKO classic and T12/T15 soldering controller
[quote author="sparkybg"]If this is the case, then driving 2 tips is easy - you put common ground on outer shell, common "-" on the pin and separate "+" on the sleeve. And the TC voltage will be negative in respect to common "-" this way, so we have to use inverting amplifier to read it. Tonight I will try what happens with C2-C3 TC voltage when C1-C3 are short-circuited. If the C2-C3 voltage stays the same when C1-C3 are connected together, then this might be the case (2 thermocouples).[/quote]

Do you mean this way?
Edit: updated scheme.
21
Project logs / Re: My HAKKO classic and T12/T15 soldering controller
[quote author="sparkybg"][quote author="jry"]So it means two separate channels (secondaries, mosfets, opamps, MCU) even for tweezers controller.[/quote]

Yes, or at least I thing so.[/quote]

Possible solution for PA120 Micro Tweezers would drive and measure only one tip in one time (25Hz)? Disconnect other tip C2(-) and C3(+) connections for this period. With 100VA transformer you would need limit tip power anyway.
23
Project logs / Re: My HAKKO classic and T12/T15 soldering controller
[quote author="sparkybg"]Now I measure it between C2 and C3 on my controller, in order to be able to connect earth to C1.[/quote]

Is TC voltage between C2 and C3 also present on heated standalone tip, disconnected from handle?
24
Project logs / Re: My HAKKO classic and T12/T15 soldering controller
[quote author="sparkybg"]Thank you. It appears that they are really treating each tip completely separate from another one.[/quote]

So it means two separate channels (secondaries, mosfets, opamps, MCU) even for tweezers controller.
25
Project logs / Re: My HAKKO classic and T12/T15 soldering controller
I hope I understand it now, thank you. One more question:

[quote author="sparkybg"]Body is always grounded, but there is a link between the body and one of the heater conductors. This will either make both tips using common - or both using common +. But, the thermocouple also is between the body and this same conductor that is common to heater and body.[/quote]

I'm not sure what do you mean with LINK? Is it 0.2ohm connection through the thermocouple?
Thermocouple voltage is measured on C1(GND) and C3(+) pins?
[attachment=0]
26
Project logs / Re: My HAKKO classic and T12/T15 soldering controller
I hope I got it. The problem would be gone when using the same tip type (C245, C210, C470, etc) in both tools?
Problem is caused by different connections inside tips:

[attachment=1]
[quote author="sparkybg"]The heater is always between C2(-) and C3(+). The thermocouple signal is on the same terminals and polarity.

- on the C245 there is a direct link between C3(+) and C1(GND) in the tip.
- on the C210 there is a direct link between C2(-) and C1(GND) in the tip.
[/quote]

(information from neslekkim's post)
C245:
C1(GND) -> C2(-) 2.9 ohm
C1(GND) -> C3(+) 0.2 ohm
C2(-) -> C3(+) 2.9 ohm

C210:
C1(GND) -> C2(-) 0.2 ohm
C1(GND) -> C3(+) 2.1 ohm
C2(-) -> C3(+) 2.1 ohm

Could we just swap C2(-) and C3(+) in T210 "custom" connector? According to JBC specification it is not possible to put C210 tip into T245 and C245 tip into T210? The C470 tip is probably using the same internal connections as C245.

[attachment=0]

I hope I'm not overlooking something obvious. Again.
29
Project logs / Re: My HAKKO classic and T12/T15 soldering controller
sparky, could you please comment on following idea?
  • Simple JBC-only controller.
  • Small aluminum box 125x160x52mm (HM-1455Q1601).
  • Toroid transformer 160VA; 230VAC; 24V; 6,667A.
  • Supported tools T210, T245, T470 (limited by 160VA transformer), PA120 Micro tweezers, HT420 Thermal tweezers.
  • Own tools connector (commonly available) with tools identification using tool-specific resistor attached to one connector pin.
  • Both tweezers and single tip tools (T245 etc) would use the same connector.
  • Iron controller would support two such connectors (channels).
  • It would be possible to use two single tip tools simultaneously or one tweezers tool.
  • Software power management based on tools identification to prevent tips overloading.
  • Probably AVR/atmega based, I don't have the PIC pipeline yet.
30
Project logs / Re: HAKKO (907ESD) and SOLOMON (SL-10/30) soldering iron dri
arhi, I have bad feeling about spamming your thread with JBC related questions. Are you interested in JBC tips support or should we move this discussion away?

I'm considering building simplest possible "two channel" JBC iron driver with support for T210, T245 and PA120 micro tweezers.

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