Electronics > Beginners
Soldering station simple modification
oskimac:
--- Quote from: Doctorandus_P on April 22, 2019, 10:58:42 am ---
One of the ways of using the iron wrong is cleaning the tip before you put it in the stand. NEVER do that !!!
If you put the iron in it's stand, it should always have a bit of solder on it (from the last solder connection you made)
This thin film of solder on the iron protects the tip from corrosion. Instead, the molten solder on the outside corrodes.
Then, just before the next conection, you clean the tip with such a steel wool sponge, to wipe of the old solder, together with it's corrosion and you have a shining freshly tinned tip.
For your modification, I see 2 easy access points to modify the temperature setting.
One is between the wiper of the pot and one of it's ends.
The other is somehwere in the feedback loop of the thermocouple or RTD of the iron itself.
Directly on the potentiometer is probably the easiest.
Take a resistor that is about twice the value of the potentiometer, and connect it between the wiper and one of the ends.
If the iron now gets hotter, then move the resistor to between the wiper and the other end of the iron.
If your iron now gets cooler add the switch etc.
If the temperature change is too big or to small, use another resistor.
You said your TS100 arrived broken.
What is broken? Did you complain?
One of the fun details of the TS100 is that it has a built-in motion sensor, and can reduce it's temperature when it's not used for some (adjustable) time.
--- End quote ---
Hi, and thanks for your time!
as i said it was my first time asking here and i have learned a few things, don't write details that might distract the main subject of my question. the oxidation, the high temp etc. people keep answering to tose things that arent the real problem.
well, i tried already the two solutions you suggested. but i might be choosing the wrong resistor because it makes no difference. i will try different ones. the thing is, i check whit the multimeter the resistance of the potentiometer but it goes from 12 ohms at 11 k and the it lower again. strange. measuring from the middle to one end.
oskimac:
--- Quote from: Psi on April 22, 2019, 11:32:35 am ---My 2 cents
You should be able to keep your iron on for 8 hours a day at 350C and be able to solder 95% of stuff you need at that temp. The tip should last a year like that without problems.
If you have to run your iron above 400C to get work done there is something wrong. Most likely you are using the wrong tip for what you are soldering. Use a bigger/wider tip and you can reduce the temp
You should check that your solder is not acid core/plumbers solder. That stuff is not for electronics and will ruin iron tips coatings. Without the coating it will oxidize fast.
If you use your iron for melting plastic then stop. Some plastics will ruin iron tips coatings with just 1 exposure. Without the coating it will oxidize fast.
Make sure you buy iron tips for a proper authorized seller. Digikey/Mouser/RS/element14 etc. If you get tips from ebay/aliexpress because they are cheap then that will by why they keep failing. When it comes to iron tips there are many many fakes out there that will oxidize fast and disintegrate away.
You can get good tips from china/aliexpress sometimes but unless you have had and used good tips before it's hard to know if a china tip is bad or not, since you have nothing to compare against. So buy genuine tips first, then experiment with china tips later to see whats available that works
--- End quote ---
:palm: :-// :-DD culprit of all the above
oskimac:
--- Quote from: Doctorandus_P on April 22, 2019, 10:58:42 am ---You said your TS100 arrived broken.
What is broken? Did you complain?
One of the fun details of the TS100 is that it has a built-in motion sensor, and can reduce it's temperature when it's not used for some (adjustable) time.
--- End quote ---
yes. i can never use it, after powering it, make some estrange noise inside (not from a burning mosfet or something, i know that sound ;) ). the sound was like (flushhhhh flushhh) like when you drop a drop of solder on water. well the thingis at certain moment i noticed the tip glowing red! then "bad tip". i complain but the seller didnt take care. (from aliexpres to usa and then to Uruguay it take more than 45 days) boy another tip and it says bad tip again. so i asume something bad whit the mosfet. i replace it and keeps burning it. the tip is new. the mosfet is new. new firmware. so i ordered sgm8551 op amp the cjq4953 dual mosfet and the tmp36 . but these is for another time :phew:
oskimac:
Well! finally i can make it work as desired. Thanks to your help.
it goes from 157 to 315 C°
https://imgur.com/a/1EFabwo
soldar:
In irons without temperature control it was common to put a diode in series and a switch would short the diode when the iron was picked up.
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