hybridfree/eevblog-posts huggingface dataset:
Can I put these in an oven? - Page 1
Forum section: electronics / general

author: hp23
author_rank: Contributor
timestamp: March 02, 2024, 09:38:49 am
content: Just about to reflow a pretty complex board. I've checked the profiles for pretty much all of the components except these:https://www.digikey.co.uk/en/products/detail/amphenol-cs-commercial-products/RJSSE508001T/4894885. The board is 4 layer with huge ground planes, so I'm going to be at the upper end @ 250 degrees C (~480 deg F) peak. Specific profiles are vague/non existent & I can only see a reference to JEDEC-020C and UL 94V-0. Anyone used these before with lead free? I'm planning on SMD291SNL250T5 paste.Note: Reflow soldering peaked at 260⁰C for 10 seconds max for the shielded, mine is unshielded. Time for metalic tape?

author: Kean
author_rank: Unknown
timestamp: March 04, 2024, 09:46:09 am
content: The Amphenol website has a full product specification with reflow profile.Did you look there or contact Amphenol? Don't rely just on the distributor provided data.It does stateQuotehttps://www.amphenol-cs.com/product/rjsse508001t.html

author: SMTech
author_rank: Frequent Contributor
timestamp: March 04, 2024, 12:16:20 pm
content: The described profile is nothing special, nothing should really be going over 260C anyway in normal circumstances. Of course if you are running a shitty tabletop IR oven you could have nasty hotspots and plastics tend to have a bad day.
Which depaneling option?   - Page 1
Forum section: electronics / general

author: loki42
author_rank: Frequent Contributor
timestamp: March 02, 2024, 11:22:17 pm
content: We need better depaneling for v scored boards. We can think about switching to tabs if there's a major improvement. What are you using for depaneling? I'm looking at the CAB and FKN machines. The circular blade machines are what I've mostly been looking at but can look at punching. Are their good Chinese options in this space too? How about laser depaneling? I've got a Epilog co2 laser and a Trumpf fiber. I've also got a few punches for other tasks I could put tooling on if that's a better approach.

author: Doctorandus_P
author_rank: Super Contributor
timestamp: March 03, 2024, 01:16:48 pm
content: Quote from: loki42 on March 02, 2024, 11:22:17 pmSo, what are your current tools you're looking to upgrade from?What sort of volume do you have in your production runs?How many different panel sizes?The circular wheels have been around for ages and apparently they work well for small to medium production runs. But those wheels have never been too gentle with brittle ceramic SMT parts (resistors and capacitors)On the low end of the market, there are handheld tools that nib out tabs, and the next step up is a pneumatic tool that does the same (often mounted in a table).But we're also living in the 21 century. If you do a search on youtube for fully automatic depaneling tools then routers with a carbide bit seem to be used quite often. You can get a reasonably quality 6040 CNC router for around EUR2000. You can combine that with milling a custom trays for your panel that work with a vacuum system (you can mill these on the 6040 itself) then the vacuum holds all the PCB's and you route around them.For bigger production runs, I would put those trays onto some sort of pallet system with a conveyor belt so the machine itself can load and unload the pallets.

author: loki42
author_rank: Frequent Contributor
timestamp: March 03, 2024, 09:04:23 pm
content: Using hand tools at the moment. Only 100 boards per day. All our panels share the same outside dimensions but rail width changes. About 4 total different. Is punching / nibbling less likely to damage ceramics than circular blades?
Re-using of a JLC stencil frame (keep frame, replace stencil sheet)? - Page 1
Forum section: electronics / general

author: Pinkus
author_rank: Frequent Contributor
timestamp: March 01, 2024, 04:47:25 pm
content: Sometimes a stencil is only needed a few times and would then be thrown away, e.g. if the circuit board changes again during the development phase.I often order framed stencils because they are easier and quicker to use, so the stencil sheet comes already glued into an aluminum frame. It would be a shame to throw that frame away if the stencil became obsolet. Better would be removing the old stencil from the frame and replacing it by a new one.(Note: if you are ordering stencils from JLC, the extra costs for the stencil frame is minimal, but the shipping costs for a framed stencil are not!)I couldn't find anything about this on the internet, but I'm certainly not the first person to come up with this idea.So: has anyone ever cut out an old stencil from the frame and glued in a new one and can tell you the best way to do it?Thank you!

author: selcuk
author_rank: Frequent Contributor
timestamp: March 01, 2024, 08:15:02 pm
content: Due to the shipment costs, I use frameless stencils with custom size (smaller) from JLCPCB. I cannot recommend a solution for reusing those stencils. But instead of messing with glue and mesh, isn't it easy to use a system like the below or a similar one?https://app.lpkfusa.com/products/smt_stencil/zelflex_reusable_stencil_frames/http://www.zelflex.com

author: Pinkus
author_rank: Frequent Contributor
timestamp: March 01, 2024, 11:08:26 pm
content: Thanks, though I am already using such an universal frame. I built an adjustable frame using aluminium profiles, some 3D printed parts, rods and linear bearings. The whole unit is then mounted in my ZB3040 stencil printer (https://aliexpress.com/item/4000270778981.html) like a regular framed stencil. See photos attached.However working with it is not as good as with a framed stencil: if the framed stencil is at 100%, I am currently at 80%.This ZelFlex Protect LPKF frame from Selcuk's link looks to be great, but I guess it will be quite expensive.Edit: found the price: $2200 (cough)

author: glenenglish
author_rank: Frequent Contributor
timestamp: March 02, 2024, 09:14:02 pm
content: a few years ago I bought a neoden stencil frame. getting the perforation pattern for the fingers to grab the stencil was hit and miss.Air pressure on the device permitted the stencil claws to withdraw, where the stencil could be put onto the holder. Then, you removed air and the tension came up as the springs in the device tensioned on all sidesSeemed that Neoden had NFI what the dimnensions exactly were required- so I presume they were reselling it. so that took a few iterations.I did get some good results from it, however I found tearing likely on 0.12 and 0.1mm stencils, and stopped using it. OK for thicker 0.15mm stencils
PCB Varnishing - Page 1
Forum section: electronics / general

author: S. Petrukhin
author_rank: Super Contributor
timestamp: February 02, 2024, 12:44:02 pm
content: Friends, I don't know anything about PCB varnishing technologies.Now we have this process performed manually from a sprayer. I am printing 3D plugs to protect connectors, contacts, etc.Tell me, please, about industrial systems that perform varnish coating?I will be very happy to link to some machines.

author: thm_w
author_rank: Super Contributor
timestamp: February 02, 2024, 10:04:54 pm
content: You can google it:https://www.google.com/search?client=firefox-b-d&q=pcb+conformal+coating+machine#ip=1https://www.chemtronics.com/the-ultimate-guide-to-conformal-coating

author: otter42
author_rank: Newbie
timestamp: February 19, 2024, 03:52:58 pm
content: Hi,It depends which are your EMS capabilities :- Manual spray with manual masking (tape or objects or ...)- Manual spray with peelable protection- Varnish bath with peelable protection- Robot varnishing like the exemple sended by Thm_wOften varnishing is performed on entiere multiple boards pannel.From my experience, nowaday when the volumes goes up it's EMS varnish with robots :- Robot varnishing imply an initial tooling cost but is less labor cost after.- Robot varnishing is sometime tricky to get right depending of the board design (varnish keepout area well separated from varnished area or jumbled)- Sometimes they use two varnish compound, one is liquid the other is gel to create boundaries to avoid some spills- It may takes sometimes to get the EMS to have a good programm and it must be check from time to time with UV Lamp but it's quite good when the EMS is goodSo thinking the conformal coating/varnish at design stage is important, it makes the varnishing easier and get a better quality.There is also a critical information, you must know which type of conformal coating you want :- If it's too tough/hard it will reduce the lifetime of the board by adding some more stress on the parts- If you have to perform some soldering aftewared on the board for assembly it may be better to have a reworkable varnish- The toxidity of varnish fume can also be importantFor conformal coating, in my applications I tend to prefer :- Relatively soft varnish such as acrylic or other elastic ones- Non toxic fume when soldered with iron (either for primary assembly or for parts alterantive testing for example)- Easy reworkable directly with soldering iron- ...
Advice for Arduino/Raspberry Pi - Page 1
Forum section: electronics / general

author: B-Su21
author_rank: Newbie
timestamp: January 25, 2024, 07:12:42 am
content: Greeting,The intention is to have a robotic arm and a sorting machine work together. The items will be picked up by the robotic arm, and they will be sorted by the sorting machine based on size, shape, function, color, or other criteria, utilizing Arduino, Raspberry Pi, and several sensors. Essentially, various items such as bolts, screws, plants, fruits, vegetables, defective items, metal from plastic, cotton, and fabric can be sorted by this system.The goal is to identify an industry where the collaborative use of the robotic arm and sorting machine can effectively address and solve an existing problem.If the consideration is to use the arm and sorter, which industry would be advisable to choose, and why?Thank you.

author: Kean
author_rank: Unknown
timestamp: January 26, 2024, 12:09:33 pm
content: You usually design a machine to solve a particular problem. Or if you have part of the solution, you then find a problem and design a machine to solve the problem starting with what you have.From your description, it sounds like you have no solution nor an identified problem to solve!This sounds like a school project...

author: Aspartame
author_rank: Contributor
timestamp: February 05, 2024, 06:28:39 am
content: If you want to classify with camera image using deep learning algorithm you may want to use a sbc like nvidia jetson or better.

author: Doctorandus_P
author_rank: Super Contributor
timestamp: February 16, 2024, 11:33:42 am
content: This smells like a homework assignment.
Support and scheduling software - Page 1
Forum section: electronics / general

author: loki42
author_rank: Frequent Contributor
timestamp: February 25, 2024, 12:15:41 pm
content: I'm looking at some options for omni channel support (email, messenger and Instagram in one would be good) and something for production planning. Is anyone using Frepple? I'm thinking of using it with inventree. How about open source support options? O or is everyone running something like Zendesk / Front / Freshdesk? Is there an open source alternative? I like being able to control and customise the software but I need to make support easier to do.
Packaging Dimensions Standard - Page 1
Forum section: electronics / general

author: andre.lubbock
author_rank: Contributor
timestamp: February 02, 2024, 12:34:09 pm
content: HiI'm looking for a standard covering packaging dimensions for Dual Inline Plastic Surface Mount Package. I expect JEDEC would have something but so I've come up empty handed.One of thesehttps://au.mouser.com/ProductDetail/onsemi-Fairchild/FOD817ASD?qs=7cQpS2oZOEPJG7mvClvS4w%3D%3D&mgh=1&vip=1&gad_source=1&gclid=Cj0KCQiAwvKtBhDrARIsAJj-kTikWf4uJMCktL6FU4QSW9FTPSpucfK13A-6by0j03XEVNfHyLT8fl0aAkTqEALw_wcBCan anyone help please. Thanks

author: Ian.M
author_rank: Super Contributor
timestamp: February 02, 2024, 01:07:35 pm
content: I don't think you'll find one. Datasheet page 11 (PDIP4 GW package drawing)Quote

author: andre.lubbock
author_rank: Contributor
timestamp: February 03, 2024, 12:19:35 am
content: Good call Ian and an unfortunate mistake by me as I seem to have linked the wrong datasheet - my apologies.Below I've linked to 2 manufacturers. Their drawings are so similar that presumably there's an underlying standard ?SM part in this datasheethttps://www.mouser.com/datasheet/2/149/H11A817B-87085.pdfSL-4 in this datasheethttps://www.diodes.com/assets/Datasheets/DPC817-Series.pdfSpecifically, I'm interested in the minimum creepage distance shown in redThanks again

author: Ian.M
author_rank: Super Contributor
timestamp: February 03, 2024, 12:31:35 am
content: Its body probably uses the same moulds as the through-hole DIP package, so odds are if you can find the dimension limits for a JEDEC standard DIP package, these gull-wing DIPs will be the same. However you will need some fudge factor for flashes on the mould line and for it not perfectly centering on its pads during reflow.

author: andre.lubbock
author_rank: Contributor
timestamp: February 03, 2024, 02:24:18 am
content: You're right the mfr datasheet shows SM and TH share the same body.I have found the JEDEC standard for the TH part but unfortunately it differs from the mfr drawing and also does not specify some key dimensions.I've attached the JEDEC standard for the benefit of others.Thanks for your input

author: tooki
author_rank: Super Contributor
timestamp: February 10, 2024, 12:05:05 pm
content: Those probably aren’t “key” dimensions, then.Regardless, I’m not sure you’re going to get the answer you want (an underlying standard), given that the one manufacturer expressly says it’s not based on one!They’re clearly derived from standard PDIP, but that doesn’t mean there’s necessarily a standard for them.Just design around the worst-case scenario based on the manufacturer drawing. Pretend there’s a ridiculously oversized draft angle on the case (like 45 degrees) and use the minimum dimensions. If your design is so tightly calculated that the dimensional tolerances would make or break the creepage requirements, it’s a bad design to begin with.
Convert 3d printer to basic PNP machine - Page 1
Forum section: electronics / general

author: c64
author_rank: Frequent Contributor
timestamp: February 10, 2024, 04:27:26 am
content: I found (online) some people make add-ons for 3d printer to use it as a PnP machine. Anyone here has any experience?I would be happy even if it can place just resistor/capacitors (0805/0603). And if some are not placed very precise, can always fix them manually with a toothpick.
Reel unloading and preserving practice - Page 1
Forum section: electronics / general

author: Shonver
author_rank: Newbie
timestamp: February 02, 2024, 12:35:52 pm
content: What is the current best practice for unloading a reel of SMD components and terminating the tape end? I am think specifically of minimising the loss of components and ease of re-deployment of the reel when next needed.We recently received leftover parts from our contract manufacturer and I was dismayed at the lack of care for preservation of the parts in the tape. In some cases, the tape had been pulled back by a length, exposing the components, and was then closed up with masking tape. On examination I could see that some parts were lying upside-down or rotated. What can they do to preserve the packaging of the parts in the tape? And how should they best terminate the reel in preparation for future use?

author: Jackster
author_rank: Frequent Contributor
timestamp: February 02, 2024, 12:41:49 pm
content: When removing tape from the feeder, depending on the machine being used, you can end up losing anything between 10-50mm worth of components on the tape due to the feeder mechanism.So having a few parts at the end of the tape fall off, rotate etc is normal.For high-value items, care should be taken to minimise loss but don't expect that treatment to small value Rs and Cs.

author: jmelson
author_rank: Super Contributor
timestamp: February 02, 2024, 04:07:21 pm
content: On my old P&P machine, it was possible to not lose any components, but not worth the trouble for cheap passives like 0805 resistors. On my newer machine, I can usually save all but a couple parts. **BUT** there is a procedure for doing this. You have to cut the cover tape at the right spot, carefully pull the component tape back and leave enough empty component tape to re-thread the feeder later. Of course, a contract manufacturer won't spend the time to do this all neatly for you.Jon
Wornow SR1000 Solder Mask - Page 1
Forum section: electronics / general

author: tarun172
author_rank: Regular Contributor
timestamp: January 31, 2024, 06:26:16 pm
content: Hi,I was asked to find out if a regular soldermask could be used instead of Wornow SR1000. I have a drawing that specifies this particular soldermask, and I have been unable to find an equivalent one. Is anyone aware of whether the Wornow SR1000 solder mark is still used in the PCB industry as a soldermask resist? Are there any alternatives?Thanks,Tarun S
Mini wave / selective wave soldering - Page 1
Forum section: electronics / general

author: loki42
author_rank: Frequent Contributor
timestamp: February 15, 2024, 01:30:25 pm
content: I'm attempting to use mini wave nozzles with my Ebso selective machine instead of the standard jet or wetable nozzles. I'm not sure if there are any guidelines for the mini wave as the documentation doesn't mention them at all. Should I only move in one direction with the mini wave? Should i dip in z(up / down) or should I move forward and back at the same height? How far past a pin should I move and what is the best speed and wave height?

author: IconicPCB
author_rank: Super Contributor
timestamp: February 16, 2024, 06:11:07 am
content: Loki G'day,I have a small selective soldering fountain with selectable nozzles , wave height, pot temperature and solder pump duration controls.Depending on the alloy give Yourself 40 to 60C head room in solder pot temperature over liquidus.Depending on mechanical aspects of components You are soldering, give Yourself sufficient jet height for solder to penetrate the PTH hole but not flood the top surface.Depending on componentry ( heavy leads?) and recommended soldering process window set the contact time with the solder jet accordingly.Generally I select the nozzle to suit the range of components ( for example I use a 30mm nozzle to solder a row of pins on a relay ).At 240C I typically set contact time for 3 to 4 seconds for conventional undemanding components.The other important aspect is the flux. I have settled on an a flux from AIM not because it is the best but because it is the best readily available i have found.I would be interested to hear which flux You are using.As You can imagine since I am talking manual operation, I solder an area / set of features at a time and then when the solder pump subsides I move onto the next feature.
Anyone have any experiences of assembly with AiPCBA? - Page 1
Forum section: electronics / general

author: Marmotta
author_rank: Contributor
timestamp: January 26, 2024, 08:28:59 pm
content: I was looking around for assembly fabs in preparation for having a couple of designs I've working on made (probably around 100 each) and came across AiPCBA. They seem to have an absolutely huge selection of advertised parts in stock for prices similar to those LCSC offer, in particular they have a few FPGAs and MCUs I need that LCSC rarely have in stock at all.I haven't submitted gerbers or a BOM to them yet, but before I even bothered I was wondering if anyone had any experience with them, as I can find very few reliable reviews or testimonials for them.https://www.aipcba.com/
Small Flyback Transformer Manufaacturer - Page 1
Forum section: electronics / general

author: Daniel Williams
author_rank: Newbie
timestamp: January 24, 2024, 10:40:04 pm
content: Hi folks,I'm looking to find a manufacturer for a custom small flyback transformer. 5v to 300v step up. It is already designed. It is used in a small commercial device, cost is sensitive and quantities are rather low. A US manufacturer is most desired. Got any ideas? Thanks!Dan

author: uer166
author_rank: Super Contributor
timestamp: January 24, 2024, 11:49:32 pm
content: Wurth is alright for low quantities. Usually low volume and low price don't go together very well though, it'll have some premium on it.

author: Daniel Williams
author_rank: Newbie
timestamp: January 25, 2024, 06:18:00 pm
content: Thanks, but I really want to find a US manufacturer.Dan

author: Faringdon
author_rank: Super Contributor
timestamp: January 26, 2024, 07:43:09 am
content: Type in "Ferrite transformer manufacturer" into google, along with "near Maryland", or wherever you are.If its a simple wind, then truthfully, any "contract electronics manufacturer" could do it, and test the finished parts. (Hipot test, resistance test, leakage inductance test, etc).A "PCB assembly" place could even do it.You could even do a youtube video on how to wind it for them.Be careful though, there is some chance a ferrite winder may send them to china to be wound, just "clip" it on to a larger batch job that they have.

author: Smokey
author_rank: Super Contributor
timestamp: January 26, 2024, 09:32:14 am
content: https://premiermag.com/Worked with them a bunch of times. Great company.
BOM management in excel - Page 1
Forum section: electronics / general

author: Faringdon
author_rank: Super Contributor
timestamp: January 20, 2024, 06:55:54 pm
content: Hi,I am trying to putC1C35C3C100etc, etcinto numerical order.So first i need to split the text "C" from the cell, so just the number is there.Do you know how to do this?. Googling reveals that this isn't a common operation for excel'ers.OK..to separate the C away, it seems its best to start another pllel column. then go MID(D2,2,4)......(D2 is the cell) and that seems to do it, but doesnt seem intuitive.Ensuring that the colum with the formula, is formatted as a "general" type....(not a "text" type)You'd think there would be an "unconcatenate" function?

author: meshtron
author_rank: Regular Contributor
timestamp: January 21, 2024, 01:09:44 am
content: A bit cleaner than "MID" is this:- Put your values in column A- Put a formula in column B that is=TEXTAFTER(A2,"C")Then grab both columns, and sort by Column B.
How Elecrow became a SPAM machine (Rant) - Page 1
Forum section: electronics / general

author: L1L1
author_rank: Regular Contributor
timestamp: January 20, 2024, 03:16:41 pm
content: Hi all,I guess this will sound like a rant, but I feel that this is the best place to get this out...I'm the owner of a small online marketplace for open hardware electronics called Lectronz, which hosts many sellers who propose their products to hardware enthusiasts.Yesterday, someone used the contact form we provide on each product page to send the same message repeatedly to our sellers. The message starts as "I am highly interested in your electronic work and would like to acquire more information...". The sender has an ordinary gmail address. But the few people who responded quickly discovered that this was just a bait email from Elecrow, one of the low-cost PCB makers from Shenzhen, inviting our sellers to join their ship and sell their hardware on their own platform. After connecting the dots, we discovered that this was the second SPAM campaign they launched against our community in the past months. Naturally, our sellers weren't pleased.This is pathetic of course.And it doesn't stop here. We have been informed that Elecrow has used the same tactics to spam people on Hackaday DMs and Twitter DMs.Elecrow provided a pretty decent service to the hardware community a decade ago. Today, it seems that they have just become a massive SPAM machine. I assume they got crushed by the competition (JLCPCB) and are now desperate to make a dollar. I urge everyone to avoid using their services. With that kind of company culture, who knows what they will do with your personal data or intellectual property.Alain

author: ataradov
author_rank: Super Contributor
timestamp: January 20, 2024, 03:40:28 pm
content: Same observation here. I actually asked them to close my account and forget my information, since it was not even possible to do in their UI. Still got spam, so I just made a filter to automatically mark their stuff as spam and delete it.If you are making an Elecrow account, you are subscribing for infinite spam.
Another JLCPCB factory tour - Page 1
Forum section: electronics / general

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: January 19, 2024, 07:54:11 pm
content: https://youtu.be/jTBOSob5MLg

author: thm_w
author_rank: Super Contributor
timestamp: January 19, 2024, 10:25:15 pm
content: damn Ferenac is always super thorough, 1hr 10mins total length.52:26 doesnt fully show but it does show them routing outside of stacked boards with no vacuum or hold down that I see (just at the outer edge).1:05:22 the notorious wireless ESD strap makes an appearance.

author: schmitt trigger
author_rank: Super Contributor
timestamp: January 19, 2024, 10:32:00 pm
content: The Chinese board houses have the prototype-to-small-run business completely figured out.And no, it is not only the low cost labor. If this was true, Cameroon would be a manufacturing power house.

author: ataradov
author_rank: Super Contributor
timestamp: January 19, 2024, 10:43:07 pm
content: Quote from: thm_w on January 19, 2024, 10:25:15 pmI think it is a vacuum table. You can see him struggle to align that base spoil board and he had to peel it to re-align a bit.Quote from: thm_w on January 19, 2024, 10:25:15 pmThis looks like a body voltage monitor similar to StatIQ that Dave checked out some time ago.

author: thm_w
author_rank: Super Contributor
timestamp: January 19, 2024, 10:51:12 pm
content: Quote from: ataradov on January 19, 2024, 10:43:07 pmNo just a cheap wireless strap. There is no chance they'd spend $2k+ on monitors for each employee.

author: ataradov
author_rank: Super Contributor
timestamp: January 19, 2024, 10:54:02 pm
content: Ok, yeah, I was looking at the small embedded window and assumed that the bright opening was that fancy gold flux capacitor.I had hope that it is something similar, but at a reasonable price point. I absolutely did not expect them to buy the actual $2K bands.

author: EEVblog
author_rank: Unknown
timestamp: January 19, 2024, 11:11:30 pm
content: Quote from: thm_w on January 19, 2024, 10:51:12 pmLCSC (aren't they the same company as JLC PCB?) also used these fake "wireless ESD band" and I called them out on it. They replied and said they were embarrassed and would fix the situtation. I didn't follow up on that though.

author: thm_w
author_rank: Super Contributor
timestamp: January 20, 2024, 01:10:35 am
content: Yeah thats the notoriety, from your video.LCSC hasn't posted any youtube videos for four years:https://www.youtube.com/@LCSCElectronics/videosThe last videos show some employees using the wireless strap and some using nothing. I doubt they've "fixed" the issue by using proper ESD straps or monitors, it would just be too much of a hassle for them to do that. If you look at Mouser, this guy has some weird wrist straps but seems unrelated to ESD (1:35). Probably just proper shoes and flooring is enough in most cases.https://youtu.be/FDCS9qSLVpY?t=94In terms of JLC, I wouldn't trust them to assemble a high end PCBs. With any decent PCB assembler, they'd have staff clipped in at the benches.
Anyone Have Experience with Neoden T8L Reflow Oven? - Page 1
Forum section: electronics / general

author: meshtron
author_rank: Regular Contributor
timestamp: January 17, 2024, 10:48:09 pm
content: My T937M "cash register style" oven is proving to be a weakpoint - I know you all have your shocked face on! It works great for small stuff, but I have an opportunity for some decent volume larger boards that are all LEDs so I need accurate, consistent heat over a larger area than I can get anywhere near with this machine.I'm considering a T8L (or maybe the slightly smaller IN6) conveyor-style reflow oven from Neoden. Anyone have any experience with these or something similar? In a theoretical scenario where I assemble/reflow these myself, I'd probably be looking to run something on the order of 50 panels a day, once a week through with a size of 500mm x 240mm with zillions of low/medium-power LEDs on them. So, not too worried about preheat times and such - more about reliability and consistency so I can get nice reflow without toasting any lenses.Appreciate any thoughts!EDIT: Found the thread about IN6 eating elements, that doesn't sound at all interesting to me. I'm really thinking more about the T8L anyway which is why I didn't do a better search for IN6. Updated the title to be more accurate.

author: level6
author_rank: Regular Contributor
timestamp: January 18, 2024, 05:55:37 am
content: I recently acquired an IN6, a huge upgrade from the tray oven I had. I've read about the IN6 needing element replacements more often than expected, but I think that was for folks running it near or at the max temperature of 300 C. I've never heard of the T8L model. The USA distributor does not sell it. I see more folks upgrading from an IN6 to the IN12, which is a very capable machine.

author: meshtron
author_rank: Regular Contributor
timestamp: January 18, 2024, 02:53:00 pm
content: Interesting, thank you! Glad to hear you've been having good luck with your IN6. Everything I've read said it's really solid besides the element issue, but perhaps you're right. I'm using Loctite GC10 on everything so don't see why I'd need to set anything up near 280C+, maybe I'd be just fine with that. Certainly an easier size to incorporate into my limited space!
XGecu T48 software on mac + wine - Page 1
Forum section: electronics / general

author: emastyle
author_rank: Newbie
timestamp: March 03, 2023, 04:50:17 pm
content: Hello, anyone tryied to install or use the XGecu T48 software (XgproV1250) on mac + wine? ... I didn't had succes with that. Any suggestion?

author: biosetup
author_rank: Newbie
timestamp: January 28, 2024, 12:48:09 am
content: Hi, did you find out what software for macOS can be used for Xgecu T48?
0402 footprint is too big? - Page 1
Forum section: electronics / general

author: Faringdon
author_rank: Super Contributor
timestamp: January 13, 2024, 05:05:31 pm
content: Hi,Is the attached OK for an 0402 footprint?Our customer sent us board with them all like this.The silkscreen is as it is shown here too.You could actually solder a 0603 to them.As you know, 0402 max size perimeter is 1.1mm x 0.55mm.(0603 max perimeter is 1.8mm x 0.9mm)I think its too difficult to get enough solder paste on pads if they are "right size" for 0402...hence the bigger pad will ensure decent amount of solder paste for each pad, and therefore no tombstoneing....would'st you agree.SMD res footprint sizes...https://www.koaspeer.com/products/resistors/general-purpose/rk73b/

author: Feynman
author_rank: Regular Contributor
timestamp: January 13, 2024, 11:31:10 pm
content: It depends on the soldering process, but for standard re-flow processes the pads are most likely too big and could be prone to tomb-stoning.For footprints like 0402 it's always a good idea to ask your CM a for recommendation.Here is a blog post from a CM recommending a 0402 footprint, for example:https://www.worthingtonassembly.com/perfect-0402-footprint
Very large scale PCB manufacturing almost entierly automatic. - Page 1
Forum section: electronics / general

author: MT
author_rank: Super Contributor
timestamp: December 09, 2023, 05:32:21 pm
content: PCB ,clad lamination, weaving glass fiber sheet rolls, etc

author: Doctorandus_P
author_rank: Super Contributor
timestamp: January 13, 2024, 07:39:17 pm
content: I am not so very much impressed by those people pushing around carts with stacks of PCB's.I've also seen conveyor belts with those big panel PCB's whizzing by. Less human interaction reduces damage to the PCB's and also improves reliability and speed in other ways.Apart from that, it's also just a few short video clips with some random details of PCB production.Compare that with the now pretty old video's from Eurocircuits, where they go though the whole manufacturing process in a lot more detail. for example they also mention things such as distortion of the layers in multi layer PCB's during lamination.
SOT223 with copper pour to TAB? - Page 1
Forum section: electronics / general

author: Faringdon
author_rank: Super Contributor
timestamp: January 14, 2024, 03:54:39 pm
content: Hi,Supposing you have a SOT223 and you want to maximise the copper pour to its TAB pad and yet still allow it to be well soldered in the SMD bath.How big could it be made? (the coper pour to the tab pad)20z copper and 4 layer pcb and no thermal reliefs (ie direct connected tab pad to copper pour)PBSS4540Zhttps://assets.nexperia.com/documents/data-sheet/PBSS4540Z.pdf

author: jpanhalt
author_rank: Super Contributor
timestamp: January 14, 2024, 04:07:28 pm
content: Does page 7 here help:https://www.st.com/resource/en/application_note/an1703-guidelines-for-using-sts-mosfet-smd-packages-stmicroelectronics.pdf

author: Faringdon
author_rank: Super Contributor
timestamp: January 15, 2024, 07:27:44 am
content: Thanks but no, it just shows Rth(j-a) with various copper areas

author: SMTech
author_rank: Frequent Contributor
timestamp: January 15, 2024, 08:24:40 am
content: I've seen plenty of boards where the tab "pad" is nothing more than a mask defined area on a copper pour covering a large area. It works just fine in reflow, where it would fail would be if the exposed&pasted tab pad area was long enough to pull the sot223 away from the pads for the other feet. I have seen this happen quite often with a D2PAK footprint that was the default in a version of Proteus. I don't think you could tombstone a SOT223, although it would be interesting to see someone explicitly try to...

author: jpanhalt
author_rank: Super Contributor
timestamp: January 15, 2024, 09:17:08 am
content: Quote from: Faringdon on January 15, 2024, 07:27:44 amThere is no "maximum" size. It's asymptotic There is a minimum size recommended for 2oz copper and a formula is given for calculating maximum watts based on the size of the pad.I suspect it will be difficult to find an exact answer for your situation, but it seems an approximation could be calculated with the information provided by someone normally skilled in the trade.
Test jig with SMT spring-loaded pins - Page 1
Forum section: electronics / general

author: mssp
author_rank: Newbie
timestamp: January 02, 2024, 09:36:10 pm
content: For a jig testing a very thin PCB, I plan to use spring-loaded pins that can be automatically assembled, such ashttps://jlcpcb.com/partdetail/Xinyangze-YZP0652_1507201/C5157254- As far as I know, P100 pogo pin are typically used for such a task.Any reason why SMT pins should not work?- the test points have ENIG surface- the lower force of about 50g should be ok- the precision of the pin is anyway higher compared to P100- to keep deformation of the jig-PCB minimal, there is direct mechanical support on the backside of the pins- there are no receptables, so the pins cannot be easily replaced. That's ok because the jig-PCB is cheap enough.- Are there any positioning pins which center the PCB-under-test that can be automatically assembled?

author: thm_w
author_rank: Super Contributor
timestamp: January 03, 2024, 12:20:31 am
content: Not really any reason other than the throw tends to be less, and mechanical strength will be a lot lower. Jigs tend to get abused. With a through hole pogo sockets, you can swap out the pin with a new one quickly.Any part number for the pins you plan to use?You can google SMT guide pin and find some options:https://www.mill-max.com/products/new/sure-hold-surface-mount-pcb-pinshttps://www.fivetk.com/product-category/by-category/smt-series/smt-guide-pin/

author: mssp
author_rank: Newbie
timestamp: January 03, 2024, 09:43:23 am
content: thanks for the confirmation, I agree with your points. I plan to usehttps://jlcpcb.com/partdetail/Xinyangze-YZP0652_1507201/C5157254They allow a tight placement of test points. Should they be mechanically too unstable I can glue them to the PCB.For the guide pin, I have used so far GP-1S. Those are also spring-loaded what is definitely preferred as the guide pin and pogo pins get lowered manually onto the thin PCB. The issue with GP-1S is that they cannot be assembled automatically (or I wouldn't know) and they require like 30mm of free space on the other side of the jig-PCB. The linked guide pins are all rigid=non-spring-loaded or did I miss something?

author: thm_w
author_rank: Super Contributor
timestamp: January 03, 2024, 10:23:40 pm
content: Don't get too obsessed with automated assembly.You could add springs to the locating pins, or use the SMD pogo pins as the balancing springs and have them evenly around the PCB. Or just use standoffs which fit into the board holes, if the tolerance is not too critical.Without reasoning as to why you need to make it so compact and maybe some example photos, there is not much to go on here.https://smdprutser.nl/blog/build-your-own-testingprogramming-jig//0]https://www.testfixtures.com/mechanical-test-fixtures/#iLightbox/0
Neoden 10? - Page 1
Forum section: electronics / general

author: Rat_Patrol
author_rank: Frequent Contributor
timestamp: April 18, 2023, 04:52:01 am
content: Any experience with them yet?

author: Cathy_Neoden
author_rank: Newbie
timestamp: April 27, 2023, 05:09:56 am
content: Hey, here is the specification comparison chart of N8, N9 and N10 for your reference. Hope this helps.

author: sinewave
author_rank: Unknown
timestamp: April 27, 2023, 10:39:15 am
content: The image says that the K1830 cannot be side by side, does this mean side-by-side PnP machines or other machines as the N8 definitely supports conveyors/side by side machines

author: Rat_Patrol
author_rank: Frequent Contributor
timestamp: April 28, 2023, 10:13:51 pm
content: Quote from: Cathy_Neoden on April 27, 2023, 05:09:56 amThanks. Can you tell me about the feeders?

author: DLE
author_rank: Contributor
timestamp: May 04, 2023, 02:06:34 pm
content: I recently picked up an N9 that we are having a lot of success with so far. I think what they mean, is that on the N9, the machines can be bolted directly together with no conveyor between. The K1830 and N10 both require conveyors between but have a wider shop footprint and more feeder slots.

author: andrea.longobardi85
author_rank: Contributor
timestamp: January 01, 2024, 10:13:48 am
content: Hi, is there a noticble improvement then compared to the K1830? Is the IN9/10 anywhere near the quality of the mid-level brands? Like Juki, Yamaha, Mydata etc?

author: Davlec Ltd
author_rank: Newbie
timestamp: January 02, 2024, 12:43:42 pm
content: Quote from: andrea.longobardi85 on January 01, 2024, 10:13:48 amThat may never happen. Besides when you are looking at those brands you are also looking at their very specific features and how they match your needs, Mydata machines are highly targeted at smaller batch CEMs for instance, features you find on them should in reality be things Neoden, and other more expensive but European manufacturers should be trying to emulate, but they don't. When it comes to a combination of quality and value the names that keep coming up on my radar are Samsung and Panasonic even from the sales teams of rivals.
SMPS transformer winding? - Page 1
Forum section: electronics / general

author: Faringdon
author_rank: Super Contributor
timestamp: January 26, 2024, 07:41:20 am
content: Hi,When you are eg winding a PQ26/20 bobbin, it's a vertical bobbin so (if its a single layer) you have to start and terminate the windings to the same end of the bobbin.So , if you need to wind say three single layers ....then how do you get the coil end "back across the bobbin" for termination?Do you...1....Suddenly stop the coil at n=x turns, and then do a right angle turn down across the bobbin and terminate?2.....Spiral wind the last turn back across the bobbin so you can terminate it?PQ26/20http://www.ferroxcube.home.pl/prod/assets/pq2620.pdf

author: jonpaul
author_rank: Super Contributor
timestamp: January 26, 2024, 01:22:55 pm
content: FTSS: usual garbage.Read book Smith Magnetic Componentsj
PCB Magazine for unloader and recommended destackers - Page 1
Forum section: electronics / general

author: loki42
author_rank: Frequent Contributor
timestamp: December 28, 2023, 10:55:42 pm
content: So I need to buy some PCB Magazines for my Nutek M size unloader. Does anyone have a recommended source? I'm fine with Chinese ones, These are post the oven and I'm looking for 5 ish.My current start of line destacker is a bit dodgy too. Does anyone have a recommendation for a cheap destacker or even better single magazine start of line loader? My preference is as small as possible. The JOT ones look amazing but also pretty pricey. I'd be happy to hear recommendations of Chinese options.

author: Jackster
author_rank: Frequent Contributor
timestamp: December 29, 2023, 12:08:22 am
content: I have a dozen of these. They do the job.https://s.click.aliexpress.com/e/_EvoTQxX
What desoldering station/iron shoud I buy? - Page 1
Forum section: electronics / general

author: Langdon
author_rank: Frequent Contributor
timestamp: December 11, 2023, 05:37:08 pm
content: I am a hobbyist solderer/maker and I would really like a desoldering sation/iron.I want something that will last a long time.I already have a Hakko FX-888D and a pretty good fume extractor.It should not cost too much.I am in Canada so I have to deal with stupid currency exchange and shipping problems.(Not that i don't like canada or anything, it's awsome)

author: Jackster
author_rank: Frequent Contributor
timestamp: December 11, 2023, 05:46:15 pm
content: Desoldering vacuum iron? I have the Pro'sKit SS-331.Cheap thing from China but works really well. Sits next to my Hakko. Use it all the time on a commercial level.https://www.aliexpress.com/item/1005003458555245.htmlAs for hot air, I have the ATTEN ST-862D. Again, another solid bit of kit.Used it for about 4 hours today already.https://www.aliexpress.com/item/1005002114736880.html

author: eleguy
author_rank: Regular Contributor
timestamp: December 11, 2023, 07:46:37 pm
content: I have also Atten ST-862D and it works like a charm.

author: Langdon
author_rank: Frequent Contributor
timestamp: December 16, 2023, 08:50:31 pm
content: Is it reliable and long-lasting?I have heard about filter isues for other stations.Do the filters work okay?

author: loki42
author_rank: Frequent Contributor
timestamp: December 17, 2023, 12:18:15 pm
content: Used metcal. If it's 20 years old you've still got 50 years left. New thermaltronics. Other decent brands used are often a pretty good deal too.
Removing 18 pin 6PDt PCB mounted switches - Page 1
Forum section: electronics / general

author: Spectral Transmission
author_rank: Newbie
timestamp: January 01, 2024, 11:34:36 pm
content: Good evening all, hopefully this is the right thread to post this. I have a few interlocked 18 pin push buttons that I am trying to remove and just can't seem to break free. I've tried using my Pace SX-70 and solderwick and the holes get pretty clean but I can't seem to actually get the pins to let go. Does anyone have any advice or techniques to try?

author: Kim Christensen
author_rank: Super Contributor
timestamp: January 02, 2024, 12:53:12 am
content: Don't know what you've tried so far or what your experience level is...Make sure the SX-70 has a clean new tip, all the filters, & solder collector tube are clean/new, and it has good suction.Add plenty of flux to the joint before starting. Use a gentle sideways rocking/rotary motion with the SX-70 when the solder flows and as you engage the pump. (Wiggle pin when suction is engaged)Before trying to yank it off the PCB, rock each pin to see if it is free. Reflow and resuck any that are still stuck.

author: Spectral Transmission
author_rank: Newbie
timestamp: January 02, 2024, 01:34:38 am
content: Quote from: Kim Christensen on January 02, 2024, 12:53:12 ami have a few years of experience soldering and desoldering but not a whole lot with bigger package items. Most of my experience is with caps, resistors, diodes, etc. I did replace the outer visifilter and cleaned the collection tube, however I did not try a new tip. However now I think of it I haven't checked the internal filter in my PPS-85A nor do I know the condition of pump for I bought this unit used. I will say the suction is better than the super clapped out MBT201 I use at work but I am not sure if it is at the correct amount. I have been trying the rocking motion but I give it another shot with a new tip and another good cleaning. Thank you!
Mold release gel?  (Potting) - Page 1
Forum section: electronics / general

author: DTJ
author_rank: Super Contributor
timestamp: December 14, 2023, 06:43:53 am
content: We pot some boards in a two piece mold using an epoxy. We use PVA mold release sprayed onto the mold. It works well.The mold has a piece that fits over the cable sealing the end of the mold.This piece has a small gap (~0.1mm?) that the epoxy likes to sneak through.I'm looking for some sort of gel that can be applied between the two mold pieces to fill this small gap and stop the potting compound from leaking out.Waxes and greases would work but they are horrid to clean up afterward.I'm toying with the idea of using some school craft glue or similar brushed onto the mating surfaces of the mold part. It should fill the gap and its water soluble to remove afterwards.Is there a made for purpose mold release gel that I can't find?Cheers.

author: Mr.B
author_rank: Unknown
timestamp: December 14, 2023, 07:02:56 am
content: I usually use a silicone spray for epoxy mould release.Would a thick silicone grease work for your application?I use a CRC Silicone Grease (food grade) on my beer fermenting equipment and it is fairly thick.I buy mine from Bunnings NZ (CRC brand), though you can get it from home brewing suppliers - they usually call it Keg Grease.Not sure how much of a pain it would be to clean up in your situation though.

author: Matt-Brown
author_rank: Regular Contributor
timestamp: December 14, 2023, 02:15:56 pm
content: Have you tried an RTV? Longer cure, but we use it as potting dams

author: DTJ
author_rank: Super Contributor
timestamp: December 15, 2023, 02:02:22 am
content: Quote from: Mr.B on December 14, 2023, 07:02:56 amGrease would definitely work - clean up would be difficult though. The current blue PVA mold release just washes away like magic with some water.ThanksQuote from: Matt-Brown on December 14, 2023, 02:15:56 pmRTV would work well but the clean up would be a big problem. Thanks for the suggestion.