SOLDERING GUN REPAIR
ฝัง
- เผยแพร่เมื่อ 20 ต.ค. 2024
- I repair a soldering gun for use on my antique radio repair project.
a new soldering gun:
www.amazon.com...
If you want to support me in my video making:
PayPal.Me/Brads...
or
/ bradslabratory - แนวปฏิบัติและการใช้ชีวิต
Boy, those switches were a work of genius. We really had some engineering quality and ingenuity back in those days, didn't we? I miss them. Many thanks for showing.
I've owned or repaired dozens of dual heat Weller guns made over the past 65 years or so. I suspect that you are correct in assuming that someone had previously reassembled the switch incorrectly. Every Weller trigger switch that I have ever taken apart has been assembled with what are called "screw rivets" or "hammer drive rivets", not ordinary screws. Those rivets can be unscrewed and reused easily by gripping the edge of the round head with a miniature pair of Channelocks or ignition pliers. Now that the #7324 switch used on the 8200, D550, and D650 has been discontinued, it's important to know that most of them can be repaired. If the switch feels mushy, doesn't click, or doesn't turn off (or on) reliably, chances are the small spring connecting the 2 brass bobbins has failed. I mark the edges of the brass actuators and take a picture to aid in reassembly. The trigger itself only goes in one way. Also be aware that the return spring will go flying off to destinations unknown if you give it the chance.
They are occasions where one needs super high heat quickly for heavy duty work. The gun is the best option. However I still like my American beauty 300 watts iron.
I have one like that in its original box probably 50 years old, very high quality tool, the original price sticker on it says $4.99!
Can't beat those older Weller soldering guns
They are a beast! Love this thing!
Brad, working in switches for a long time, and when they come apart like your old soldering gun did, It's always a plus!! And I'll tell you why. You were clever putting the switch back together properly, good on ya!! My point is that I put dielectric grease in
that switch cavity. I use it on all electrical things exposed to the elements, like trailer lights, and inside switches. That grease will
allow lubrication to the moving parts, AND not hinder current from flowing inside it, hence the name dielectric. So, ya want to keep moisture out of light sockets, and slide a bit of dielectric under heat shrink when making a splice, that the ticket. Dow makes it and it's available from Electric supply houses. Moisture is a killer to splice joints, it's gone with this stuff. Keep a tube in your electrical drawer, and opens are gone forever. Especially in a ground circuit. Opens are harder to find than shorts. Just sayin".
I used to have a tube of that, I used it on my snowmobile trailer connections and any connections on the sleds. worked awesome. one day a wrench or something got on top of the tube in my tool box, when I got back down the mountain it was everywhere but in the tube. I'll have to pick up another tube at some point. As this wasn't going to be out in the weather, I wasn't that worried about it. I have specified and bought a lot of switches over the years from mil-spec to surface mount PC board units - so I hear where you are coming from!
Not the clearest video but excellent tuition. I have a similar Weller gun, owned for about 40 years when I bought it new, where just the low power side of the iron is now working. Clearly I have an issue inside the switch which is failing to connect the high power side when the trigger is pushed all the way in. Your video has shown me what to expect when I take it apart giving me confidence to tackle it. Thank you. Good job.
you have the idea backwards all the way back = low, part way back = high
@@adamkempa5157 It is counterintuitive, but you are correct.
My grandfather sold mac tools out of the basement business and truck, So I've got i nice collection of these all in near perfect condition.
Great soldering tool to have around! Thanks!!! besides, didn't know it snows in colorado!
How did you solder the cord on your solder gun? Lol Kind of like how do you take a picture of your camera?
Thank you for the follow, I did as well! Yes the LED kit on my channel is amazing, they really work well and have amazing color rendering! They are also said to last 45 years.
The best ones I have are the ones I pulled out the dumpster - I (over)built my own power supply and they have been fantastic.
th-cam.com/video/8afVEaeD1u4/w-d-xo.html
But were they invented 45 years ago?
I mean how else would they know?
Mean Time Between Failure (MTBF) and Mean Time To Failure (MTTF) is typically stated on the manufactures data sheet. There is a whole science behind it and a typical value is 100,000 hours for an LED. So just over 11 years. That being said we know they die well before that, it is typically due the power supply that is driving them failing and providing the wrong voltage & current to the LED, shortening its life span.
Checked your site and couldn't find a LED kit for Weller soldering gun.
Thinking of the turns ratios, the "center tap" would be "HIGH" and the full primary would be "LOW" because the change is being made on the primary side. The secondary (tip) winding is the tip structure itself, with only one turn through the core, hence, the secondary voltage will be higher when the only a portion of the primary is being used. Consider the situation if the primary also consisted of only one turn -- the voltage induced in the secondary would be the same as that of the primary. Therefore, we can see that fewer turns in the primary will induce a greater voltage in the one-turn secondary. Since the secondary (tip assembly) circuit resistance remains the same, there will be more power dissipated in the tip due to the increased current when the voltage across the tip is higher.
That is not what they taught me in school. If you have 120 windings on the primary (Line Voltage) side and 120 windings on the secondary side you have an isolation transformer with the same amount of voltage and current on the secondary as the primary, minus some losses in the conversion. When you reduce the number of windings in the secondary, you don't have as many turns being cut by the magnetic field of the primary, thereby reducing your voltage and increasing your current. This is typical of may microwave oven transformer projects you find on You-Tube, where they have the 120 Volt primary coil intact but add a turn or two of heavy gauge wire as the secondary. They have decreased the voltage to only a couple of volts but massively increased the current allowing for welding. The same is true for the reverse, if you double the turns on your secondary, you will double the voltage output, but half your current. In this way you can make a step up transformer to operate 220 Volt equipment in a 110 Volt county. Turn the transformer around so that the 220 Volt side is now the primary and the reverse is true - you have a step down transformer allowing use of 110 Volt equipment in a 220 Volt county. Taking the step up transformers to the extreme you have the Tesla coil as an example, where relatively few windings on the primary are coupled to a huge number of windings on the secondary creating very cool high voltage arcs that have very little current associated with them.
This is what I was taught in school and know to be true due to personal experience.
This page essentially explains it the same way, with the math included:
www.electronics-tutorials.ws/transformer/transformer-basics.html
Thanks for your comment!
@@BradsLaboratory: Yes, but the secondary winding consists of but one turn -- the shiny tube which holds the tip. If the gun is a multiple-wattage device, any changes in the power output must be made in the primary winding because the secondary is fixed. Under load, my Weller D550 (older model rated at 240/325 Watts) produces around 0.3 VAC across the tip. At 325 Watts, that means about 1,000 Amperes(!) are flowing through the secondary circuit -- the shiny tube and the tip. The gun is rated at 20% duty cycle -- one minute on, four minutes off.
By the way, the lamps are 222's, and there are several places (1000 Bulbs and others) where you can buy a box of ten for about three bucks.
I also have a 1960s Weller. Shes a Bute boys. B E A You-tee-full.
Mine is an 8250a. Single speed.
Saludos desde Ecuador exelente esplicacion en la reparacion del cautin tipo pistola gracias ..bendiciones
La mejor pistola, dt Vesubio!!
What's with the wire twisted around the tip? Should I be doing this? More mass, broken tip repair, sturdier?
Tips came that way back then, I think it was part of the manufacturing process, pulling the bend together. It was probably a person doing that step.
Hi Brad. greetings from Colombia. Do you know what model the gun is? Is it a Weller brand? An uncle gave me a very similar one, with the two bulbs in the front. but this one has a very split casing. maybe i can get the case if i identify the model. The most similar I've seen in TH-cam videos is yours. I will appreciate your help. luck!
what is the voltage rating for the wedge light bulb ?
Cool. I love useful videos that teach. Liked, watched and hit the big red button.
Thanks a bunch!!!
The whole soldering gun needs a good cleaning ,it looks to be well used but I am sure after a through cleaning ,and a new tip before it's put back into service,so you can get a lot more use out of it,me.personally I like my tools to look maintained ,and as well maintain too ,
I'm glad you fixed it, it can be a pain to fix.
Thanks! I have used the crap out of it since fixing it!
Did it work after the tear down ?I am curious to know thanks vern
Yes - still using it today.
Put all small items in a bowl,
My soldering gun is melting the housing. Any ideas on what's causin it?
Nice video. We could be buds! Electronics and metal detecting are two of my passions. Too bad I live in Illinois. :-)
Glad you liked it, I have a couple more electronics type videos I am working on. But shooting and editing takes time!
I'm trying to figure out how to replace the trigger and I'm going to replace it with a foot switch but I'm having a problem finding out which wire(s) are full power. I connected 120v to each lead and tested the current going through it and I'm getting 75-83 watts on the single (black) conductor, and about 142 watts on the "center tap" yellow wire (the one with 2 wires coming from the coil). So I'm way off of the 250 watts I'm supposed to get.
I did also connect both black & yellow in parallel and it sounded the same (slight buzz/humming) but I was getting ~385 watts and the windings get hot very quickly.
I've checked the coil and it seems to be in good condition, no shorts to anywhere that I can tell.
Red -> Black = 3.6 ohms
Red -> Yellow = 3.2 ohms
Yellow -> Black = .1 - .2 ohms
I'm wondering if you have ever tested the power usage or wattage of your device and have any suggestions on how this might be wired to get the proper 250 watts. This is much more frustrating that I would have thought for something so simple.
They are most likely lying about the power. Sounds like you are right on it with the red wires
For low power (only) connect the mains between red and black. For high power (only) connect the mains between red and yellow. The switch operation is easier to understand if you think of it as 2 separate switches controlled by a common trigger . First click closes the master section and sends power to the slave section. The second click determines which one of the two taps on the transformer receives power from the slave section The high power you observed when paralleling yellow and black wasn't going to the tip. If left that way it would quickly burn up the primary winding of the transformer. The actual power you measure is highly dependent on how well the tip is connected to the posts. Even a small amount of extra resistance at the connection points will make a big difference in power delivered.
Que numero o calibre es el alambre del bobinado primario. Saludos y de cuantos wats es
I've faced the same pain. My most viral video was a video where all the stuff I meant to record didn't. So I ended up pointing and showing instead of doing...and yet, it went viral - well relative to my channels size. :)
Especially creative trigger fix.
Few coils means low voltage and lots of amps . . . cool.
Thanks for the sub and the comment. I had just got my GoPro and was still figuring the best way to film.
I am #634 on your channel!
Those are a solid unit, for bigger jobs go higher wattage! great vid subbdd
Thanks for the sub! I am already subscribed to your channel!
I just subscribed. I enjoyed the video and gave it thumbs up.
Got you back, let me know when you've done the same.
I like your videos; you seem to be a very nice fellow.
Peace be upon you. I have a caustic 100-watt caustic iron, which is very weak. How do I turn it into 250 watts.
It is all about the transformer, that is the most expensive part of the soldering gun. I would just look for a 100 watt gun, otherwise you are winding a new transformer and then it won't fit in your old gun.
Thanks for the video, how many laps do the coils have? Thank you
I am going to take an educated guess at around 200 turns of 22 AWG solid wire.
This is based on an iron core calculator I found here:
www.ajdesigner.com/phpinductor/inductor_equation.php#ajscroll
with 200 turns on an iron core (.00653 Permeability) and a coils area of about .4" x 3.9" comes up with about 26mH of inductance which is about what I measure with my inductance meter.
Also It just looks like about 200 turns, by counting 10 and then looking at it - it seems about right.
Hey I know this video is old but umm chuckles^ ya should of add some Christmas lights it’s way cheaper^
5:53...if the "case is cracked in a few places", then the soldering gun had better STAY OUT of those places(!)
How come you know all these diversity of tech stuff. These are the things I never be able to make up my mind to do it. But always dream of doing it!! Great boy's stuff!! My please to sub . your luck no. 472
i must say Frankie Yip - it's not just boys. i Totally Agree with you about the deciding part; All my life. I find everything fascinating to the point people get tired of my questions. Trying to teach yourself is not very productive when it's the interpretation that means so much. =\
one last thing - this is my first time on Planet E; i'll be back - (in spite of mean ppl) and hope i remember, 'What Not to do'. *~> He's been here before. =]
I am sorry for the so old fashion-minded words, I really doesn’t mean something like boy-only or girl -only. Actually I do admire any gender who did great job on their interested field. I wish you found yours in your life.
Your videos are lit. Keep it up! I liked! :)
Thanks a bunch! You have a great channel!
here again with my third account ,, cheers from greece
How many turns in primary
I did not take it far enough apart to count the turns. Turns can be calculated with a formula.
testguy.net/content/246-Transformer-Turns-Ratio-(TTR)-Explained
Not to be mean cuz i appreciate the video, but most people prefer diy/repair videos to get straight to the point, we don’t need the whole backstory. Sorry I’m really not trying to be mean, just giving constructive criticism. Thanks again!
Thanks! Did you get yours fixed?
That's not a soldering iron, This is a soldering iron!!
what we got off track by a mile with granny and mom .Interest lost
my gun is later version...has no screws on switch...has cheap looking riveted part...aaarrrrgggghhhhhh..maybe I will drill the rivets out..
Just try to clean the switch with some contact cleaner.
www.amazon.com/CRC-5103-Quick-Electronic-Cleaner/dp/B000BXOGNI/ref=sr_1_3?ie=UTF8&qid=1477946197&sr=8-3&keywords=contact+cleaner
Your diagram was right you explained it wrong less turns on primary = high power the whole coil would be low power
The primary winding typically doesn't change - you build it to take in 120 volts, and then change the secondary to get different voltages. Fewer turns on the secondary equals less voltage and more current. Power is derived from the voltage/current of the secondary.
i am over here with my second account
For salé?
NO WAY! I use this thing all the time!
You can get a new one for $40:
www.amazon.com/Weller-D550PK-260-Watt-Professional-Soldering/dp/B00002N7S1/ref=sr_1_3?keywords=soldering+gun&qid=1555617148&s=gateway&sr=8-3
Empieza en el minuto 4
Starts At 3min50s.
I'm over here on someone else's account.