Video was insanely useful. I knew of stenciling but never actually used it in practice. working in SMT production you couldn't have made this more simple and clean thank you!
It might not hurt to give people an idea of what temp to use on the oven. You don't want components to be over 285°C for any length of time. Some can take up to 300° for short times but you need to check the data sheet for any ICs or expensive parts so you make sure you don't compromise them.
If you're undecided on stencil cleaners I would suggest using non flammable, slow evaporating solvents for better results. IPA damages the solder paste chemistry. I hope this is useful for anyone reading
You can also tape the stencil, so you don't have to press it along all the process, you only press it while spreading the solder paste, it'll make the job easier
Wow, thanks for that. I had some major issues with my last attempts at stencilling. It really is a lot easier when you actually see the process in action... Hopefully Round 2 will go a lot better!
The fumes from lead solder contain zero lead. The concern about solder fumes is the same for lead-free as it is for leaded. It is the flux vapors that are hazardous, not the lead. Contacting lead solder on your skin or in your mouth or inhaling lead dust, wherever that's going to come from could be hazardous. Some people might suggest wearing rubber gloves that's probably a bit over precautious. All one really needs to do is not touch the damn stuff that much with your bare hands and then wash up afterwards.
What makes the fumes harmful? Lead does not fume until 450° so at soldering temperatures of under 400° the only fumes will be the flux. Are the fumes from the flux used for lead free solder any better for you than those from the flux used for leaded solder? I have never quite understood this and have worked in electronic factories on and off for 30 years.
Flux is generally worse for you with lead-free solder since it has to be more aggressive to promote Sn wetting. You're right, leaded solder isn't any worse for the person doing the soldering, but it is worse for the environment.
ROFLMAO, I've been working on a project that the finale set up is going ti be using an SMD system, & this will be perfect for mass producing my PCB's thank you so much for this.
You can look it it up the melting point of solder is is 90c to 190c and to actual make the fumes dangerous is to have it at a temperature of almost 700c and these are studies from osha and many medical journals. Look it up thats all i have to say.
Just a slightly pedantic nitpick - the danger with leaded solder is environmental, not the vapours during soldering. The lead doesnt evaporate, the flux is what fumes. In actual fact, lead-free solder is much more dangerous because the flux has to be more aggressive to help it wet. The more aggressive flux needs much better ventilation! That said, lead-free solder is better when it comes to disposal, since lead will leach into the ground and cause long-lastic environmental contamination.
I was curious how Surface mounting was done and the step by step looked a lot more complicated than you make it look. Good video and nice putty knife-fu
Leaded solder is no more or less harmful than lead free of itself when it comes to fumes during soldering. The fumes are entirely caused by the flux used in the solder, and lead free solder typically has a lot harsher flux than leaded. So you got your advice backwards. You should always take care to avoid breathing in soldering fumes, but the fumes from lead free solder is typically much worse than that of leaded. A typical misnomer is that you may breathe in lead fumes when soldering with leaded solder, but this is entirely false, as lead has a boiling point of 1749°C, even when alloyed with tin the boiling point will not come close to soldering temperatures.
Haha probably waited for the salter to dry, then after a night started recording again, but really funny how your notice! But I was expecting graffiti, but i stayed and watched it was interesting.
@@colbertbd Thank you! I Was starting to get worried that I was never getting an answer to my question! LOL I was only going to wait for 7 more years! HAHAHAH
* Why would you use your hand to hold stencil and not a quick release clamp?? Seems like an error prone idea to hold it down with your hand. * What temp and how long to heat for reflow?
ich könnte ja jetzt FIRST schreien aber das ist irgentwie dumm ^^ ich hab mich schon immer gefragt wie die diese perfekten lötstellen machen ... das erklärt alles :)
That's how the part attaches to the board. It's a paste made of solder and flux. There are other ways to solder surface mount parts, but this is (IMO) the nicest way to do it, and it's a easier for finer components and it's required for components with hidden contacts, such as BGA packages and components with a thermal lead to the circuit board.
How can you breathe lead fumes when lead doesn't even boil until 1750 degrees Celsius? I would be more concerned with absorbing it through your skin. You have zero chance of inhaling lead by way of solder fumes or reflow fumes.
Exactly. The real hazard here is the paste itself if skin contact occurs. The small particles makes leaded paste way more dangerous to handle than ordinary leaded flux core thread. Lead gets through the skin.
Calm down.. He does not specifically say that lead vaporizes during reflow. However he doesn't mention that lead-free paste contains more 'aggressive' flux in greater quantities compared to leaded paste - ergo more concentrated fumes. So in a sense lead-free fumes are the most toxic.. Nevertheless all this shit dangerous, so watch out!
I would say it doesn't even matter. All solder flux fumes are toxic and you should have good ventilation regardless of whether the flux is said to be more or less aggressive. The solder barely melts (that's the point!) and there is no vapours. It's very difficult to get any amount of the lead from the solder into your body in any way. Even ingesting the solder will not be harmful. Both metallic lead and leaded solder are practically inert in the digestive tract. I red that they were feeding turkeys with lead shot, as much as they could eat, continuously. After almost a year of continuous feeding with lead shot "some" of the turkeys showed "slight" signs of lead poisoning.
Well, I didn't see how to get or make the stencil. If you want to make several boards it would be cheaper to have your complete design, then have a company in China mass produce it for cheap. It's sad to say have it made in China, but it would be a lot cheaper. Otherwise things like iPads and iPhones would cost a lot more.
![F.HERO Ft. JSPKK x ลำไย ไหทองคำ x M-PEE - ไม่สนิทบิดหมด (Thai Riders Anthem) [Official MV]](http://i.ytimg.com/vi/kPJZ0UihBfk/mqdefault.jpg)
No reflow&result footage?!
ABSOLUTELY BARBARIC!!!
Video was insanely useful. I knew of stenciling but never actually used it in practice. working in SMT production you couldn't have made this more simple and clean thank you!
It might not hurt to give people an idea of what temp to use on the oven. You don't want components to be over 285°C for any length of time. Some can take up to 300° for short times but you need to check the data sheet for any ICs or expensive parts so you make sure you don't compromise them.
Thank you. Videos like this are creating a generation of adept and knowledgeable individuals that are going to do great things!
If you're undecided on stencil cleaners I would suggest using non flammable, slow evaporating solvents for better results. IPA damages the solder paste chemistry. I hope this is useful for anyone reading
You can also tape the stencil, so you don't have to press it along all the process, you only press it while spreading the solder paste, it'll make the job easier
Wow, thanks for that. I had some major issues with my last attempts at stencilling. It really is a lot easier when you actually see the process in action...
Hopefully Round 2 will go a lot better!
The fumes from lead solder contain zero lead. The concern about solder fumes is the same for lead-free as it is for leaded. It is the flux vapors that are hazardous, not the lead. Contacting lead solder on your skin or in your mouth or inhaling lead dust, wherever that's going to come from could be hazardous. Some people might suggest wearing rubber gloves that's probably a bit over precautious. All one really needs to do is not touch the damn stuff that much with your bare hands and then wash up afterwards.
Thanks, Bob. I wondered how that was done. I think I'll give stenciling a try now. SparkFun rocks!
What makes the fumes harmful? Lead does not fume until 450° so at soldering temperatures of under 400° the only fumes will be the flux. Are the fumes from the flux used for lead free solder any better for you than those from the flux used for leaded solder? I have never quite understood this and have worked in electronic factories on and off for 30 years.
Flux the same for both.
Flux is generally worse for you with lead-free solder since it has to be more aggressive to promote Sn wetting. You're right, leaded solder isn't any worse for the person doing the soldering, but it is worse for the environment.
how do you spin that putty knife on your palm? Very impressive..
holding a magnet between his fingers
I dig the putty knife fidget spinner.
Samy Kamkar 0 likes, 0 comment for such a legend. Haha, first after 1 month
This made my day! Buy that man a Bells! Esp the frying pan idea.
ROFLMAO, I've been working on a project that the finale set up is going ti be using an SMD system, & this will be perfect for mass producing my PCB's thank you so much for this.
So stencils just magically appear for each job? That looks like the job we can't do at home. I give a 3 for that
Link to soldering paste at Sparkfun would be GREAT! THANK YOU!
How did you cut out the plastic stencil?
Excellent demo. Thank you!
Where do I buy the stencil plastic?
You can look it it up the melting point of solder is is 90c to 190c and to actual make the fumes dangerous is to have it at a temperature of almost 700c and these are studies from osha and many medical journals. Look it up thats all i have to say.
Just a slightly pedantic nitpick - the danger with leaded solder is environmental, not the vapours during soldering. The lead doesnt evaporate, the flux is what fumes. In actual fact, lead-free solder is much more dangerous because the flux has to be more aggressive to help it wet. The more aggressive flux needs much better ventilation! That said, lead-free solder is better when it comes to disposal, since lead will leach into the ground and cause long-lastic environmental contamination.
Thanks bro.
Could you please tell me how to calculate stencil thickness for PCB with both through holes termination and SMT's
The standard thickness is 0.12mm
I was curious how Surface mounting was done and the step by step looked a lot more complicated than you make it look. Good video and nice putty knife-fu
Nice,good, excellent, keep it up
What temperature should the hot plate be at? Also how long?
Wait so you guys make your production boards all by hand??!?
Leaded solder is no more or less harmful than lead free of itself when it comes to fumes during soldering. The fumes are entirely caused by the flux used in the solder, and lead free solder typically has a lot harsher flux than leaded. So you got your advice backwards. You should always take care to avoid breathing in soldering fumes, but the fumes from lead free solder is typically much worse than that of leaded. A typical misnomer is that you may breathe in lead fumes when soldering with leaded solder, but this is entirely false, as lead has a boiling point of 1749°C, even when alloyed with tin the boiling point will not come close to soldering temperatures.
Exactly - hot plate is typically at 220 deg c
Haha probably waited for the salter to dry, then after a night started recording again, but really funny how your notice! But I was expecting graffiti, but i stayed and watched it was interesting.
Where would you recommend I get stainless steel stencils from? Thanks!
any good pcb manufacture will have this option..they are cheap
Can you put it on a regular oven at 180 degrees ?
what is the temperature to heat the devices???
Good question.. I'm searching for that information too...
www.sparkfun.com/tutorials/59#Hot%20Plate%20Reflowing
@@colbertbd Thank you! I Was starting to get worried that I was never getting an answer to my question! LOL I was only going to wait for 7 more years! HAHAHAH
Safety glasses. Because you don't want to jab you eye while twirling your putty knife.
Also solder spittle will make you blind eventually, if it happens often enough.
* Why would you use your hand to hold stencil and not a quick release clamp?? Seems like an error prone idea to hold it down with your hand.
* What temp and how long to heat for reflow?
www.sparkfun.com/tutorials/59#Hot%20Plate%20Reflowing
No final result after the cooking....and how do you make the stencil? video is disapointing
Hot Plate??? That looks like an electric skillet. Is it?
Looks like you're using Indium paste. Can you give me the part number of that product?
www.sparkfun.com/tutorials/59#Hot%20Plate%20Reflowing
Great video, thank you very much!
Any specific product is recommended ?
Where can i get stencil..i only need to replace 26 pin ffc base on acer motherboard
You upload your PCB files to a stencil site and put in an order.
ich könnte ja jetzt FIRST schreien aber das ist irgentwie dumm ^^
ich hab mich schon immer gefragt wie die diese perfekten lötstellen machen ... das erklärt alles :)
It takes that much time!
nice putty knife skills
why do you need solder paste? Can you do it without?
That's how the part attaches to the board. It's a paste made of solder and flux.
There are other ways to solder surface mount parts, but this is (IMO) the nicest way to do it, and it's a easier for finer components and it's required for components with hidden contacts, such as BGA packages and components with a thermal lead to the circuit board.
I say... that's pretty fucking awesome.
6:34 that was cool
How can you breathe lead fumes when lead doesn't even boil until 1750 degrees Celsius? I would be more concerned with absorbing it through your skin. You have zero chance of inhaling lead by way of solder fumes or reflow fumes.
which material that stencil made of?
Kapton, as he said it.
But the fumes from leaded solder are tasty.
you can get astma symptoms from it, find some other non toxic tasty stuff to satisfy your fetish ;D
Haa janiya kaa story ah
Lead doesn't vaporize during reflow...get your facts straight.
Lol, isn't the fume from leaded and lead-free solder paste the same thing? Unless they use different fluxes for each?
Exactly, the only fumes from soldering are flux fumes. Still not good to breath, but no metal vapors.
Exactly.
The real hazard here is the paste itself if skin contact occurs.
The small particles makes leaded paste way more dangerous to handle than ordinary leaded flux core thread.
Lead gets through the skin.
Calm down.. He does not specifically say that lead vaporizes during reflow. However he doesn't mention that lead-free paste contains more 'aggressive' flux in greater quantities compared to leaded paste - ergo more concentrated fumes. So in a sense lead-free fumes are the most toxic.. Nevertheless all this shit dangerous, so watch out!
I would say it doesn't even matter. All solder flux fumes are toxic and you should have good ventilation regardless of whether the flux is said to be more or less aggressive.
The solder barely melts (that's the point!) and there is no vapours. It's very difficult to get any amount of the lead from the solder into your body in any way. Even ingesting the solder will not be harmful. Both metallic lead and leaded solder are practically inert in the digestive tract.
I red that they were feeding turkeys with lead shot, as much as they could eat, continuously. After almost a year of continuous feeding with lead shot "some" of the turkeys showed "slight" signs of lead poisoning.
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come at me fam
wait... this has nothing to do with graffitti? >.
solder. not sodder.
Well, I didn't see how to get or make the stencil. If you want to make several boards
it would be cheaper to have your complete design, then have a company in China mass produce it for cheap. It's sad to say have it made in China, but it would be a lot cheaper. Otherwise things like iPads and iPhones would cost a lot more.
niceeeeeeeeeeee thanksssss
😂😅