You have a dual head on the Lumen. Simply use one head as "paste"/ink dispenser and the other head to place the part!
@dfgaJK2 ай бұрын
A head addon to extrude solder paste would also be so usefully for solder paste. It would to make it possible to avoid buying a stencil and stencilling on the paste by hand!
@isaacgraphics14162 ай бұрын
Absolutely! It might even eliminate the step of ordering PCBs if you use perfboard and use solderpaste to effectively create your own traces. People do this manually but it would be a lot less tedious if it was done by machine. You could go from schematic to prototype really fast
@DEADB33F2 ай бұрын
Could a diode laser melt solder paste in a localised area so the PNP can solder basic components as it places them without affecting the paste on adjacent pads? ...maybe would need some kind of dye adding to the paste so it's not as reflective as the laser melts it. Might also be slow, but for prototyping that shouldn't matter much.
@StormBurnX2 ай бұрын
some carbon black in the solder paste would certainly be both conductive of electricity and adsorptive of the photons from the laser.
@dougcox8352 ай бұрын
This actually sounds like a good idea. I think you don't have to worry about the solder being shiny because it's dark before melting so that would regulate the heat anyway. Once it melts and gets shiny no more heat is needed anyway. You could just slather the paste everywhere (no paste mask) and after laser soldering everything wash it all away. I do see an issue though. There would likely be paste under the components that didn't get washed away so that would likely short everything.
@rallekralle112 ай бұрын
there are laser soldering machines, but they use wire
@---..2 ай бұрын
I like the idea, but I don't think it would work very well. If you just add enough heat to melt the solder, as soon as you start placing the part, it will wick away some of the heat and it will solidify. It might connect, but it won't make a good connection, which requires getting the pin, pad and solder all above the solder's melting point so the surface tension can flow it cleanly.
@hifidom2 ай бұрын
My suggestion: Add a solder paste dispenser and a laser to the pnp unit. The laser must be thermally monitored, otherwise the solder paste will explode due to overheating. Such a machine would solve so many problems on prototyping!
@RoyvanLierop2 ай бұрын
Some UV curable conductive glue might be an option, this would give you ample time to place the parts and correct mistakes. Add an UV laser and some custom pathing to cure them instantaneous.
@MarkDurbin2 ай бұрын
Doesn't the solder paste conduct before you put it in the oven?
@dougcox8352 ай бұрын
Yes, but it is not isolated in the Z axis so it just shorts everything. This is why you use a stencil and the pcb has the top layer called solder mask or simply mask layer. but paste would just jump right over all of that.
@jgooding2132 ай бұрын
@@dougcox835 neither are the conductive paints and inks used in this video?
@aaronmdjones2 ай бұрын
Not nearly as reliably. It's many small balls of solid powdered solder surrounded by a non-conductive flux.
@MarkDurbin2 ай бұрын
@@dougcox835 I assumed it would be applied in the normal way through the stencil.
@jgooding2132 ай бұрын
@@dougcox835 neither are the conductive paints and inks used in this video?
@Magnetic9992 ай бұрын
11:10 If you want to replace the solder stencil, you can use a solder paste jet printer.
@mikeselectricstuff2 ай бұрын
Have you seen the price of those - well into 6 figures
@chrisdixon52412 ай бұрын
That was really impressive! I really like the idea of a solder / conductive paint head as part of the PCB placement process, and you're right, it would be a game changer for quickly prototyping. Good luck!
@eshkrab2 ай бұрын
Holy shit those LEDs lighting up on the lumen was the sickest thing ever
@Sam-J_12 ай бұрын
I think you would highly benefit from using UV curing adhesives, that way you get the longevity of glue that doen't immediately start to dry as the PNP puts them down, and then when it's finished you can just cure it with an LED, or in the sun quite quickly.
@bsc78122 ай бұрын
Dude. I love watching your videos. I play around with electronics as a novice hobby. But your project and your optimism just make me want to learn more. Keep up the good work bro.
@Luzgar2 ай бұрын
How conductive is non melted solder paste ?
@JoelRehra2 ай бұрын
Ohh and be carefull with heat emmiting parts... Carbon paint looses resistivity when heated up... Very useful to create e-fuses for firework ignition... but bad when it cooks your circuit because of the runaway effect ;)
@Daisy_human2 ай бұрын
Its so good to see you back on youtube
@kevincolwell21152 ай бұрын
I work in hi-rel electronics... If there's a reason we can't use solder, a common choice for conductive adhesive is silver filled epoxy.
@excitedbox57052 ай бұрын
This is what a lot of printed circuit research is doing: You could try mixing up a really THICK mix of copper sulfate + water (might want to test some solvents) and put small drops on the pads, dip the components into a solution of citric acid (water+ vitamin C powder). This mixture makes copper nano particles BUT copper sulfate is also used for electroplating. My theory is that as the citric acid washes off the component and mixes into the liquid copper sulfate on the board, it will form copper particles AND electroplate copper at the same time, welding the nanoparticles into a solid connection. Nanoparticles of metal have a lower melting point at
@christianbaumgartner71332 ай бұрын
Don‘t use Graphite! Use Lamp-Black (super fine Carbon Black)! I have experimented with both and Lamp-Black is much better. You need about 5-10 times more conductive material than the the Base too have a good conductivity. Best wishes from Germany, Christian B.
@stephen_hawes2 ай бұрын
awesome, thanks for the tip! Just bought a bunch for testing!
@davidf22812 ай бұрын
@@stephen_hawes Please also remember, if you're getting into using super-fine powders, that they can be horribly carcinogenic. Properly rated masks etc required.
@JoelRehra2 ай бұрын
Super useful for fast prototype iteration. The best part of this is that you could reverse the process! Soak the board in solvent and use the machine to pick the parts off the board again... fully automating the testing of different components on a single proto-board. And having a paste extruder would allow to print on very precise custom resistor values onto a board just by varying the length and thicknes of the paste... Exiting to see where this will go :D
@biggusmunkusthegreat2 ай бұрын
oooooh the lights going on as the pnp put them there was satisfying af. :D
@jonathancrossley68032 ай бұрын
Silver loaded epoxy is used extensively in hi reliability electronics e.g. Loctite 84-LMI Not sure how conductive it is before curing - usually cured at 150C for an hour or so. Also not going to be as cheap as something carbon based.
@RJ_Eckie2 ай бұрын
Oh mannnn we all know where this is going and I'm excited!!
@insanegammer1092 ай бұрын
Conductive epoxies are a thing, but they typically need to be cured with heat. Silver Filled epoxies are an industry norm.
@DragonFlaired2 ай бұрын
Take a look at MG Chemicals 9410 - 1 Part Epoxy, Electrically Conductive Adhesive. We use this where I work for RF die bonding. Effectively a 24hr work time as it cures with heat so I'm not sure how well it conducts uncured but worth looking at
@RestartVandelay2 ай бұрын
The carbon paint looks very similar to something we use in electron microscopy to ground samples mounted in plastic. If you don't ground them then the electrons from the microscope accumulate in the sample making it progressively brighter until it is just a glowing white blob (there are ways around this but the carbon paint is the fastest/easiest). Microscopy supply companies like Ted Pella also sell a conductive carbon glue. I haven't used it but looking at the spec sheet it also uses acetone as a solvent so will probably flash off too fast for your use. Conductive 2 part epoxies might work for your situation with their extended working time but would be more annoying to apply and a lot harder to remove once fully cured.
@IggyJackson2 ай бұрын
This is the level of excitement that got me into your videos years ago. My only input on this topic is that I know there are wood finishes that cure via UV. If you could find something like that, you wouldn't have to worry about it drying until you hit it with a big dose of UV
@mikeselectricstuff2 ай бұрын
higher supply voltage and higher resistor values will make it less dependent on the resistance of the ink
@epremeaux2 ай бұрын
some ideas: - overall this process (or variations of it) would benefit greatly from a paste dispenser as the secondary tool on the P&P. - First step : (especially for components with more than two pads, modules, etc) load the paste dispenser with component glue. This is already a common job in a larger fab houses. Glue dot the center of the component, then pick and place it. Now it wont move no mater what ends up happening with the conductive pasting. - second step : after all parts glued down, reload the paste tool with conductive paste and dot right up against the corner of the leg-to-pad interface. OR.. somehow build a head with all three : glue, paste, and pick&place.. pick the part, then while over the footprint, paste all the pads, hit the glue dot and place the part. - The paste is messy without a stencil. If you want to dispense it by the P&P, you may need a knife or needle to "comb" between legs of SOIC, modules, etc to "cut" shorts. - some sort of UV/heat curable conductive epoxy would be awesome. Add a sharp UB laser to the head. The laser point should be thinner than the component leg of most SOICs, QFPs, etc. you could even gob the epoxy a bit, provided there is a cleanup step after.. selective laser conductive curing. Just run back and forth across the leg to the pad a few times.
@jasonclark11492 ай бұрын
Neat idea! Next step is to install a paste/paint extruder onto the lumen, so that you don't need to manually pre-apply the adhesive. That would also eliminate the dry time issue if you can place adhesive then immediately place the part, and repeat. And you conveniently have two toolheads....
@DavidKenny642 ай бұрын
Was looking to see if somebody already posted this suggestion. You win! But it would be even better if you placed a dot of actual adhesive under the main body of the part to take over the job fastening the part onto the board. Then the conductive stuff, put down on the next pass wont have the job of holding the part on. Now you place the part. Of course, parts with a thermal pads wouldn't need the adhesive.
@BobHannent2 ай бұрын
About 10 years ago I toyed with the idea of using either an inkjet printer or laser printer to print onto laminate film to create multilayer, flexible printed circuits. Conductive inkjet ink was pretty widely available but toner less so. For fast, short run production runs laminate is very interesting to me. But also imagine graphene or carbon nanotube toner ink being fused to PLA based laminate film? Perhaps I've just given away a billion dollar idea, but an idea is nothing if you can't execute on it.
@dougcox8352 ай бұрын
Just a suggestion, to make it last longer just thin it like paint thinner. You would need to know what solvent base this stuff is though. The smell would be a good clue. Whatever solvent has that same smell would be right. Just remember that thinning it also makes it literally thinner so you might need to apply more. You're right about the paint not being an adhesive but maybe you can put conformal coating on the board after assembly. That stuff definitely locks everything in.
@WaffleStaffel2 ай бұрын
Probably a PVA adhesive is going to have the best properties, good viscosity, moderate drying time, strong once dried. Something like Mod Podge, or white glue that's been dried a little to thicken it up, mixed with powdered carbon, or silver/copper..
@ThantiK2 ай бұрын
You can build the reflow into the PCB. I've seen people pump 12v into a ground plane ("plane" being somewhat loosely used; it was a tuned trace) in order to basically reflow the solder directly on-board. Then they break off the tabs that give access to the internal heating layers, and voila.
@ikocheratcr2 ай бұрын
You could increase the viscosity by adding fused silica. The paint conductivity goes up as it dries because the conducting particles come together and start to form a path for current as solvent goes away. Long time ago I played with one that is basically nail polish with carbon and metal powder, for EMC shield painting.
@dennydravis87582 ай бұрын
An additional layer to this is that the conductive paints were reversible - so if a prototype placement doesn't work you can clean it up and try again. If you had an in-house PCB mill, that means you could really iterate faster and cheaper
@AdamDavisEE2 ай бұрын
ACF is the film version - Anisotropic Conductive Film. Most of these films require pressure during placement, and heat to cure the adhesive. For the processes I've used it in, it requires 250psi (not a lot, given how small the component being pressed is) and 140C for 25 seconds (which is below solder oven temperature. ACP's downside is that the metal spheres, or metal coated plastic spheres, often don't stay equally distributed in solution, but you can place it with regular paste dispensers, and it can be cured with methods other than heat. You still need to use pressure on initial placement, though, to get the spheres embedded in both sides of the contact. The conductive solutions you've used should be fine for your purposes. Their high resistance compared to copper, and lower adhesion will pose problems for many uses. I expect that debugging a board with a hundred such connections is not going to be pleasant, and the relatively high pin to pin spacing this would be capable of might limit products that can be used. For instance a 0.5mm pin pitch 32 pin package might have trouble with either shorts with too much paste, or opens with too little. Unfortunately what that really means is that this is a replacement for simple pcbs that could probably be hand soldered and placed, and probably not a great fit for high speed prototyping. I'd like to see you succeed, and I certainly don't intend to dissuade you, if you can make this work for even those projects it would be a huge benefit for many.
@SapioiT2 ай бұрын
Would be nice if you also put in the description the exact names of the paints tested in the video.
@gxurma2 ай бұрын
Hey Stephen, you have to press _and_ heat cure and cool down the z-tape, to get the part frozen in the correct position. I myself am experimenting with this. Not too reliable.
@Malusifer2 ай бұрын
Wonder if heating it up while in a vacuum seal bag would work.
@BrainSlugs832 ай бұрын
For the z tape, you could place everything and then put it into an enclosure which applies the pressure. Like the old calculator displays that used a similar thing, except it was in vertical strips instead of balls, but the enclosure squeezing it down is what made the display connector sandwich work.
@patregan2 ай бұрын
Nice work, Stephen! It looks like you found a way to make some awesome b-roll for the LumenPNP v5 intro video!
@craigrotay37322 ай бұрын
Can your pick and place machine dispense the paint right before component placement?
@graealex2 ай бұрын
Re: getting brighter - the solvent isn't conductive. When it evaporates, the distance between the actually conductive particles shrinks, reducing the resistance. It also shrinks in general. It's an obvious relationship - if you were to dilute the conductive paint even further, the resistance would increase and increase - so the reverse, the solvent evaporating will increase conductivity. I would also assume it's similar for solder paste, when heat liquefies and eventually evaporates the flux, or at least removes it from in-between the solder balls.
@Gentle_Chu2 ай бұрын
Seems quite useful for prototyping. Using the second head on the lumen as an applicator you could pick up a part, put the pain down and then place the part. Do this for every component and you have a board for prototyping right off the machine. And having the paint be sturdy but still relatively easy to remove makes manual rework easy for development.
@stephen_hawes2 ай бұрын
yeah, this is what i was imagining too! would be easy to reduce excessive drying by dispensing paste for a single component, then placing just that part. a bit slower, but likely much more reliable.
@Gentle_Chu2 ай бұрын
@@stephen_hawes Once this is solved you only need a way of fabricating decent quality PCBs at home and you can get a consistent prototype turn-around time for simple project measured in hours! Tho homemade PCBs seems like a tough nut to crack.
@ankhzet2 ай бұрын
Just use low-melting-point solder and add the heat bed, could get away with as low as 47ºC, which would not burn the components and provide low-resistance, high quality contact. Mixing low-temp solder and flux would proubably make as close to a real-time plug-and-play solder paste as possible. Graphite lackers/inks have added resistance and also are mechanically unsound, they would just crumble under any prolonged stress, so application range is limited. Mixing graphite and glue would just add an insulator (glue) between graphite particles, so you would need to find a (at least semi?) conductive glue to make it work, or some king of post-processing to increase amount of continuous graphite chain-links, otherwise the resistance would kill any possibility of it being applicable at all, i think. Maybe, some kind of long-stranded graphene-glue emulsion? But all this is pure speculation on my part, so i'm waiting for the next video =). Btw. Pure experimentation for the fun of it, as in practice it would potentially add an additional degree of complexity to some circuits, as there are cases, when the order of components being connected matters (f.e., you would want to place current/voltage-limiting resistor or zener _before_ everything else). Maybe, add some routine/rule to placing sequence to always place such elements first?
@graham83162 ай бұрын
Put the total ground on after the part. You coul could put sticky stuff under the resistor or LED in the middle to attach it and isolate each end and then drop the conductive paint on either side, maybe like epoxy. You could also make like a little epoxy sticker or something like it that outlines the pad. has two little wells, one for each pad, and separates them and it could attach onto the resistor part in the middle and then it would provide wells for the ink to sit in
@michaelpedersen59652 ай бұрын
Could you extrude paste, place, then (once done) add a conformal coating to 'seal' the board so it is more durable?
@TheMadManPlace2 ай бұрын
Why not use a 2nd head on the pick and place machine to apply solder to the pads just before placing the component? OR once the part has been picked and orientation determined, move the part over an applicator to place solder paste and then place the component. Either method will get rid of the need for a solder mask stencil and be more efficient as well. ANOTHER THOUGHT: Why not print (bubble-jet or whatever) the "green coating" onto the board with UV curing ink/paint/whatever? That would remove the need for that stencil as well. Even more savings when doing single or short run boards. FINALLY: I see that many use a laser printed image on a paper substrate to get the board ready for etching. So why not "simply" print the etching mask directly on the copper clad board? Your pick and place machine is a very effective solution for the problem of populating the board. Now it is time for you to revolutionize and simplify all the processes that come BEFORE "final assembly".
@zachhubbs82332 ай бұрын
Such a cool video, I love the visual of the LEDs coming online as the job ran! Maybe try mixing in some acrylic fluid retarder to slow the drying process.
@dtec302 ай бұрын
Wondering if you can combine them ie a tape with holes and then drop In the conductive gel where the component is
@youssefhamid67722 ай бұрын
Hey Steven, can you create an adhesive dispense machine? utilising the vision system of the lumen?
@AMTunLimited2 ай бұрын
I wonder if you could squeegee the electric paint over the solder mask like paste?
@OhHeyTrevorFlowers2 ай бұрын
Ok, the first working example was cool. What a fun idea!
@hashdankhog85782 ай бұрын
If it would be possible to develop an add on so the lumen would squirt out the adheisive as it put on components this would be absolutely killer for rapid prototyping. Imagine designing a pcb, milling it, then putting it on this to get a fulling functioning board. And when you are done designing you swap to regular solder paste.
@nirani97212 ай бұрын
This is so cool! Thanks for posting! Just wondering if you tried placing the component first and then applying the paint to the pad/component termination?
@davegeorge70942 ай бұрын
Is a heat resistant tape that you heat to melt the solder? That's reliable?
@dennisolsson31192 ай бұрын
There are conductive 3d printer filament. If you can find one you can dissolve you might be able to create a paste you have more control over its drying time and how gluey it is. Maybe even an UV curing one for resin printers?
@dermax93902 ай бұрын
If you just want the effect for like a video or smth you might wanna try how good gallium wets the connections. A circuit that melts at slightly above ambient might be of limited use in practice, but if it wets at those temps it would provide superior conductivity for a video shoot and all you had to do is heat the pcb to like 30 °C.
@wooviee2 ай бұрын
I might try this for prototyping a PCB, awesome idea!
@rklauco2 ай бұрын
It would be interesting to mix the black carbon powder with actual solder paste, then use it "normally" as paste and spread it across the board. Idea is - the carbon would cause it to conduct before melting, but then you can normally reflow it, getting "classical" PCB workings.
@jgooding2132 ай бұрын
you can get conductive glue which contains silver for mounting back biased silicon chips like sensors :)
@OMNI_INFINITY2 ай бұрын
*Nice! Sitting in shenzhen now (not chinese) and glad I forced Myself to rest after doing embedded coding past midnight. I plan to look on taobao to see what z-tape solutions are available and try at least one of those. So tired of soldering 16 pin USB connectors, and most of the 6 pin connectors on taobao didn't have data lines, so z-tape is a lower cost solution than PCBA. Would like a pick and place, but it has to be smaller and lighter weight for luggage. Already travel with some of a portable factory (that is thankfully small enough to be strapped on both arms if I want to)...LOL.*
@aerispalm65232 ай бұрын
used conductive silver glue from aliexpress a while back for an electronic postcard, where i wanted to connect 2016 cells in the lowest profile way possible(sandwiched in between a flex pcb). maybe that's something to look into
@JoshuaLawson-k2l2 ай бұрын
A issue with adhesive based interconnect is reliability over time in terms oxide creep on plating on part connections , depends on environment conditions. For prototype is all ok
@tiagotiagot2 ай бұрын
Are there any sufficiently conductive 3d printer filament?
@sadiablo2 ай бұрын
Maybe try having two part glue with spray activator, one part with graphite and spray it with second part after finishing job? First part should be conductive enough so that it works while on Lumen and for mechanical strength you would use activator
@KarlMiller2 ай бұрын
@TechIngredients made a thermal epoxy that might provide some ideas for making a electrically conductive epoxy that might be tweaked to get the right characteristics that would make it useful as a solderpaste of soets. Also, I was thinking about an INDUCTIVE heating wand that could be mounted on the lumenpnp like a toolhead for melting placed components using regular solderpaste.
@HorochovPL2 ай бұрын
PCB with stenciled soldering paste on a hot plate, keeping the soldering alloy in a liquid form?
@BrentLeVasseur2 ай бұрын
That’s cool, but if you have to manually put the ink solder on the board then it kind of defeats the automation of the robot. So what you need to do is make the robot deposit the solder on the pad first and then place the component part on the board.
@AJMansfield12 ай бұрын
What about a syringe-dispenser head for the PnP itself? Not just for this, but for dispensing paste for other applications too. E.g. pre-soldering config-specific ID jumpers in addition to the baseline masked paste layer.
@h1tec2 ай бұрын
I wonder if this could be used for flexible circuits which can’t handle the temperatures required for even solder paste. Great job as always 👍
@larsfroelich2 ай бұрын
I think you're really onto something here! What if you could extrude this stuff with a seperate application actuator on the PNP right before placing a component? The "stencil time" would be reduced to below 5 seconds! This would eliminate two manual manufacturing steps, applying the solder paste and the reflow oven. The whole point of the PNP is to make small-scale manufacturing affordable, so the fewer manual steps are required the faster a single person could manufacture PCBs with the lumen.
@EMleRoux2 ай бұрын
Add a hot plate to the LumenPNP, maybe even a solder dispensing pen. Place components on heated pcb and let the surface tension do the rest. Look at me telling you about things you've probably already thought of. - How well does molten solder conduct electricity?
@EndlessRaidApp2 ай бұрын
Seems like you could take this idea further, and buy one of the monochrome LCD resin printers, and 3d print some little pcb offset for the resin vat, mix the graphite into some 3D resin with decent pigment holding which isn't uncommon in the space, then you'd be able to just blast a conductive resin circuit design on a substrate. You can then make a thick UV activated epoxy to dispense as the solder, can mod a 3D printer or get a automated glue dispenser, "bake" under UV light and you'd have a whole setup at home PCB prototyping setup with Lumen.
@christianbaumgartner71332 ай бұрын
I have already tested UV Resin mixed with Lamp-Black, but it gets so dark, that the UV-Light can’t get deep enough and only a very thin „skin“ gets hardened!
@EndlessRaidApp2 ай бұрын
@@christianbaumgartner7133 Ah, yeah, that's a very good point. Perhaps, Indium tin oxide powder might work better?
@AdityaMehendale2 ай бұрын
Do you plan to dose the "ink" with the lumen, eventually?
@TrebleWing2 ай бұрын
I've experimented with silver paint, it has a bunch of real silver in it and it's honestly respectably low resistance. Only issue I had for my application is that it's pretty thick compared to the carbon paint
@sarchlalaith88362 ай бұрын
You should message Robert murray Smith, he makes conductive graphene ink and paint
@Falney2 ай бұрын
Conductive adhesives actually already exist and they are typically epoxy or silicone based. But they are also about 10x the price of solder paste
@solveit13042 ай бұрын
Imagine Opulo with solder paste surringe and laser. You could first apply paste, then parts and finaly laser it for melting solder paste. That would be sick, but kinda hazard for eyes 😅
@ChefBenni2 ай бұрын
Quite easy solution, build a dispenser into your pnp head ;-) I think everybody here knows where this is going and it‘s needed. Even if you place the paste with a stencil, glue placement alsways needs to be made with a dispenser. If you could make a double dispenser head into the pnp head, you could place the paste and glue within one job.
@Freakingsstein2 ай бұрын
Check Panacol, they have a bunch of conductive adhesives that might do what you want. The Elecolit 3036 is a 2 component epoxy that can cure in room temperature or an oven (normal oven is sufficient) Though I am not sure how expensive is it for low quantity consumers.
@highvis_supply2 ай бұрын
This would be fire for showfloor demonstrations
@ZuNunchaku2 ай бұрын
whats the name of his pcb holder?
@timprapotnik79512 ай бұрын
Have you ever thought of using a SLA printer to make the entire pcb in house (I once saw it done on a 3d prining channel - thomas sanladerer). Though he did etch it so I'm not sure about the safety of the chemicals... Would be interesting to see if you can 3d print the solder mask though.
@sud93202 ай бұрын
Crazy overengineered idea: have PCB, with solder paste applied, on a hotplate while placing components and flood the machine with nitrogen so the solder doesn't oxidize.
@platin21482 ай бұрын
Why not dispense solder paste on the board? And Heat it on the back side?
@innocentquasimodo2 ай бұрын
Very interesting. Did you consider to try "Silver Nano Ink and Silver Nano Inkjet Media" ? You can even print your own circuit boards. Thank you for this cool video.
@VoidStriker15232 ай бұрын
There are tons of conductive epoxies. Typically will use some special epoxies in hermetically sealed packages or for die attach. Snap cure UV materials exist as well
@alexkrause72852 ай бұрын
I worked at Apple - some modules use Z-Tape type connections. Getting good even pressure and strong reliable connections is an endless optimization game.... but yes its in 100 of millions of parts!
@asoliman912 ай бұрын
I think it will be way better if you dispense solder paste from the Lumen instead of a conductive ink, would speed up prototyping a lot!
@StreuPfeffer2 ай бұрын
since there are two nozzles on the head, have one of them be a Syringe that can dispense things? Problem is to have it consistently only drop a bit of paste/ink/liquid across teh whole syringe. And probably need to remove the pressure a bit so it doesn't drip while moving across the board for the pnp part of the job. some machines do have glue dispensers for upside down wave soldering? (iirc)
@asoliman912 ай бұрын
@@StreuPfefferThere's also an extra GPIO in the V4 head... opens up more possibilities! but yeah def. not easy
@michelbrasseur92962 ай бұрын
Does ultrasonic welding might works just as wirebond soldering, might worth a shot for fun 😊
@joepartlow2 ай бұрын
Conductive epoxy may be what you're looking for. Check out Epoxy Technologies and Loctite Ablestick. They both make silver filled conductive epoxies the can be oven cured at temperatures from about 80 degrees C to 200 degrees C and are made to be screen printed like solder paste or dispensed from a syringe.
@marshallsober2 ай бұрын
Man you should add your own UV/hardened conductive resin with the lumen head over the pads and the part you need to figure out the right product as surface tension and viscosity is a huuge factor here but looking for an idea better than the stencil and the paste i think UV resin is your next try you kind could add a solvent too make it more runny but yeah this whole process could all just be the dual head of the lumen applying paste and then cooking the board as someone else mentionned but you also could try some other stuff
@chopper3lw2 ай бұрын
Maybe a UV cured adhesive with conductive additive? You then have all the time in the world and can selectively expose it with the placement head.
@Corebb2 ай бұрын
Looks so fun!
@MrBlakBunny2 ай бұрын
this would be awesome for prototyping test builds, in general
@sebstardoo2 ай бұрын
Heyoo, UV CURING EPOXY MIXED WITH GRAPHITE POWDER 🙏🙏🙏
@phillipj11352 ай бұрын
a guy named Robert Murray smith has a bunch of videos on conductive ink and various methods of preparing it if you want any inspiration. using a mix of different size carbon helps with conductivity.
@dirtdart812 ай бұрын
A stencil and hotplate is just so easy. Or even just place the paste manually for small boards. A new way would have to be incredibly simple to be a plausible iption
@aubergine102 ай бұрын
Could you have some kind of fake component on the PNP that acts as a small sponge, then have the machine dip it in the paste, then blob the paste on the PCB, then return the sponge to tray ready for next use. Basically mod the PNP to do the painting of the paste before each actual component placement?
@nurmr2 ай бұрын
I wonder if graphite power and cyanoacrylate would respond in the same way as baking soda and cyanoacrylate and if it would be conductive enough or not.
@Robothut2 ай бұрын
UV clear resin mixed with conductive powder should do the job, as you have all the work time you need before you cure it with UV light.
@SwapPartLLC2 ай бұрын
I'm guessing you have anisotropic conductive film. It is used in a process called tape automated bonding (TAB). This is how flex cables are attached to LCD displays. It's also used for chip on flex (COF). You can't just stick components to it. You need heat and pressure to make a bond.
@LimbaZero2 ай бұрын
Maybe some ink head for that machine that put some ink to pads just before placing components. Then you can use that more fluid ink. Edit: Maybe ink nozzle size need to be enough small to do smd ic solder pads. Maybe around 0.1mm and also the pump need to be accurate for small volumes.