hybridfree/eevblog-posts huggingface dataset:
Soldering owen HW-406 problem - Page 1
Forum section: electronics / general

author: mojalovaa@gmail.com
author_rank: Newbie
timestamp: September 30, 2023, 08:47:40 am
content: Hello everyoneI bought a new soldering iron HW-406, it came officially packaged, you need to connect 4 wires, L1, L2, L3 and N, I connected it all properly, I turn on the furnace, everything works, I press for heating and the protective switch (feed switch) pops out and automatic fuses, the protection of the electrical installation is by grounding, not by zeroing.I measure the resistance between the zero terminal pin and the machine housing and the machine is in contact, the resistance is 114 ohms, apparently the machine is protected by connecting the housing to the neutral conductor.The seller still does not provide any information to help, except that he is angry because the machine is correct, he says.I bypassed the safety protection of the electrical installation at the facility for this machine and arranged the installation of the electrical network for this machine with zero protection, started the machine and the machine works, Then I go to connect the ventilation system to the machine and transfer the spark to the ventilation and blow out all the fuses, the ventilation works properly with other machines.Now with the machine connected to the ventilation, the fuses blow again as soon as the machine starts or starts to turn on the heaters.Does anyone have this stove or experiences with similar problems to give me some guidance on what to do, bypassing safety standards is definitely not a priority especially not on machines that people work with??

author: mojalovaa@gmail.com
author_rank: Newbie
timestamp: October 01, 2023, 03:30:19 pm
content: Update related to this machine, we found that the terminal pin for L3 is shorted to the machine housing and that there is a resistance of 114 ohms between the housing and zero pin.The seller does not want to help solve the problem because he claims that he sent the correct machine on the ship and that he is not interested in anything else, and he doesn't even want to send the schematic so he can find the problem himself.Does anyone have similar experiences?
TO220 middle leg bend-out tool - Page 1
Forum section: electronics / general

author: Faringdon
author_rank: Super Contributor
timestamp: September 29, 2023, 06:09:04 pm
content: Hi,Is this the cheapest repeatable TO220 middle leg bend-out tool?https://www.scalemodelshop.co.uk/bending-and-shaping-tool-expo-tools-71530-p14967/?gclid=CjwKCAjw69moBhBgEiwAUFCx2A33E1hDJgeUZDMGoEu8AxaKGR4aUkqxS7A-cypD9QLMZg_1h3QZZxoCjQcQAvD_BwE

author: Gyro
author_rank: Super Contributor
timestamp: September 29, 2023, 06:43:00 pm
content: That's a tool for bending and forming open lengths of wire and strip, it will be totally useless for selectively bending just the middle leg of a TO220 pkg repeatably or otherwise. It is not the cheapest tool for the purpose as it doesn't work. Do you agree?

author: mariush
author_rank: Super Contributor
timestamp: September 29, 2023, 07:05:46 pm
content: Have you looked at these ?central lead formed 5.08 mmhttps://www.dpv-elektronik.de/Products/Tools/Pliers/Bending---Forming-pliers/Bending-pliers-TO-220-5.htmlcentral lead formed 3.81 mmhttps://www.dpv-elektronik.de/Products/Tools/Pliers/Bending---Forming-pliers/Bending-pliers-TO-220--90-.htmlside lead formed 3.81 mmhttps://www.dpv-elektronik.de/Products/Tools/Pliers/Bending---Forming-pliers/Bending-pliers-TO-220-4.htmlside lead formed 2.54 mmhttps://www.dpv-elektronik.de/Products/Tools/Pliers/Bending---Forming-pliers/Bending-pliers-TO-220.htmlcentral lead formed 2.50 mmhttps://www.dpv-elektronik.de/Products/Tools/Pliers/Bending---Forming-pliers/Bending-pliers-TO-220-3.htmland others... a whole list at the bottom of the pages... They say in stock but who knowsYou could probably easily 3D print some plastic tool to bend the leads.For example, I'm thinking something in two steps, a first part just big enough to lock the to-220 in place and to block the leads up to the point where you want to bend the lead. Then slide the part into a bigger part that would make the bend on the center lead... squeeze the tool to bend the middle lead to the shape you want.Optionally you would want to have a version for 5 pin to-220 or other versions.

author: David Aurora
author_rank: Frequent Contributor
timestamp: September 29, 2023, 11:35:16 pm
content: Quote from: Faringdon on September 29, 2023, 06:09:04 pmHi.No.Hope this helps.

author: Kim Christensen
author_rank: Super Contributor
timestamp: September 30, 2023, 02:46:29 am
content: Have you checked with the manufacturer if a version of the part comes with preformed leads?

author: Kean
author_rank: Unknown
timestamp: October 02, 2023, 04:03:27 am
content: https://www.piergiacomi.com/en/catalogue/forming-pliers/flat-component-forming-pliers/

author: jfiresto
author_rank: Frequent Contributor
timestamp: October 02, 2023, 08:17:49 am
content: Quote from: mariush on September 29, 2023, 07:05:46 pmThey did when I bought a couple early this year. Another source may be tme.eu. They were also selling Piergiacomi tools for ca. 50% more, but also to non-trade customers.EDIT: Here isanother sourceI found.
Autotronik BS384 issue with Z-axis - Page 1
Forum section: electronics / general

author: carlospdl
author_rank: Newbie
timestamp: April 18, 2023, 10:50:01 pm
content: Hi.I'm absolutely newbie in this forum and in the PnP machines so sorry in advance for any mistake I may make.I need to back to production an Autotronik BS384. It has been working well until the last company owning it was out of business three years ago. I'd had been making some test and changed some calibration params (I don't remember wich ones).The question is that today I started from scratch to try to do the correct thingsFirst I'd calibrated the autochange nozzle tool and all worked well: I'd adjusted the nozzles position and made auto learn vaccum on every nozzle.When I tried to calibrate Head 1 & Camera-1 Offset (option A1 under Calibrate menu -> System Calibration), once prepared Blue Tape and positioned the head on top of it, I'd clicked "HEAD ON" button. The Z-axis went down, but NEVER touch the Blue Tape and therefore NEVER MADE THE CALIBRATION HOLE. The nozzle stopped about one and half centimeter above the anchor point.I don't know why. Can someone help me with next steps?Thank you in advance.

author: kinero
author_rank: Contributor
timestamp: October 16, 2023, 03:49:45 pm
content: Hi There! Were you able to get this resolved? I believe you need to perform the A-mark location and height calibration first, which sets the general height of everything else on the machine, including the default pick height. Also check the nozzles have the correct heights specified so the machine does not try to make a weird offset during head calibration.
Is "Good-Ark Semiconductor" legit? - Page 1
Forum section: electronics / general

author: Smokey
author_rank: Super Contributor
timestamp: September 29, 2023, 03:54:34 am
content: I sort of hate that Digikey allows marketplace and other random suppliers these days. Anyways, that's a whole other rant.The question of the day has to do with "Good-Ark Semiconductor".They routinely come up at the top of the list of lowest prices for stuff on Digikey (by a fair margin), but I'm hesitant to design them in to anything.Am I just being overly paranoid? What is the story with "Good-Ark Semiconductor"?

author: chris_leyson
author_rank: Super Contributor
timestamp: September 29, 2023, 06:31:42 am
content: Never had any problems with Good Ark diodes.Used standard recovery parts both small signal and high voltage. Fast recovery and Schottky diodes for flyback supplies and never had any issues.Chris

author: thm_w
author_rank: Super Contributor
timestamp: September 29, 2023, 09:24:08 pm
content: They are about 1/10th the size of AD or ON semi, but that is still quite large.Probably has something to do with all of the small US semi companies getting bought out and reducing competition? That and they likely sell at a lower margin to digikey.https://www.google.com/finance/quote/002079:SHE
What is this suction/magnetic support part called - stencil printer - Page 1
Forum section: electronics / general

author: mairo
author_rank: Unknown
timestamp: September 18, 2023, 12:36:47 pm
content: Can some one tell me what are these suction/magnetic support called and where one could buy some?Does not have to be the exact same part, I have seen many manual/semi auto printers have similar supports. I could even make them myself, but want to see what options are outhere already - types, availability, price..

author: loki42
author_rank: Frequent Contributor
timestamp: September 18, 2023, 01:09:24 pm
content: They're usually just called board supports or tooling. I'm not sure if there's a name for those specific ones but the mpm manual just refers to them as vacuum cups and the overall concept as tooling.

author: SMTech
author_rank: Frequent Contributor
timestamp: September 18, 2023, 01:38:30 pm
content: I haven't seen generic ones anywhere. When you look for support tooling for bigger brand automatic printer tooling you can certainly find generic copies of support pins in various shapes and sizes but smaller semi auto or manual printers much like the one in this picture have very short stubby support which are somewhat unique to the brand or model. We have an Essemtec (so PBT) printer that uses very similar ones to those pictured except they daisy chain as the printer doesn't have a manifold.Larger printer also have bars or blocks rather than pins or cups as an option and beyond that custom plates with suction and support delivered where it is needed.If you can't get the manufacturer/distributor to sell you some extra one making some isn't a bad idea

author: Reckless
author_rank: Frequent Contributor
timestamp: September 27, 2023, 02:42:22 am
content: Quote from: SMTech on September 18, 2023, 01:38:30 pmI have this on my Essemtec Stencil SP-002ML printer but don't know what suction is used for? If its magnetic won't pcb stick to it already? I still need to order squeegees.

author: mairo
author_rank: Unknown
timestamp: September 27, 2023, 10:34:11 am
content: The magnetic side is to stick to the machine’s base plate. The suction side is to hold the PCB flat.I am guessing i will need to machine/fabricate some.

author: Reckless
author_rank: Frequent Contributor
timestamp: September 27, 2023, 01:39:09 pm
content: See attached photos of my setup. I would think air is not needed.Can you use smaller frames? Brochure says minimum 370 x 280 x 18
Any experience with iTECH PTR-C300 frameless stencil printer? - Page 1
Forum section: electronics / general

author: danielm
author_rank: Newbie
timestamp: September 21, 2023, 02:48:11 pm
content: At 400USD it is significantly cheaper than FP2636.https://www.itechsmt.com/products/itech-manual-stencil-printer-for-frameless-stencils

author: Simon1234
author_rank: Contributor
timestamp: September 21, 2023, 06:29:06 pm
content: I had the same thought. Either the frameless printer from iTech or Neoden.I decided on the Neoden one because it is lighter and better made.In my opinion, the printer with frame that is available from iTech and also from Alibaba is not that well made.I think it's the same with the frameless printer in this series. The rotary knobs for X and Y are very loose and cannot be adjusted precisely.

author: sinewave
author_rank: Unknown
timestamp: September 22, 2023, 01:15:40 pm
content: Looks identical to the NeoDen Frameless printer.

author: huababua
author_rank: Contributor
timestamp: September 26, 2023, 09:17:32 am
content: We had that printer and after a year we switched over to a better one.On the end it doesnt make sense compared to a more cheaper unit.A company I really can recommend and where I purchased a printer from:https://dieter-metz.de/produkte/schablonendrucker/3-2seitenspannung/7-sp3050.htmlPrice was around 2k.

author: mairo
author_rank: Unknown
timestamp: September 26, 2023, 11:04:09 am
content: The problem I have with these types of printers (I have the Neoden alternative) is adjusting the stencil angle to sit flat over the PCB. I found it tedious when i have to swap stencils and having to readjust this angle, thats why I have mine set with one stencil that I use often, and do not change. If you have only one type of board, or have one standard size panel then it may be ok.
Does anyone have experience using PCB Assembly Express? - Page 1
Forum section: electronics / general

author: j_omega
author_rank: Contributor
timestamp: June 03, 2023, 09:48:43 pm
content: After a unpleasant experience with a consigned PCB assembly order through a Chinese company, I am looking for a PCB assembler in the United States. I have received about a dozen quotes, and so far, PCB Assembly Express is the cheapest by a wide margin. Has anyone else here used their services? I would appreciate any information, either good or bad.

author: lingna
author_rank: Newbie
timestamp: September 22, 2023, 02:39:03 am
content: May I ask which supplier in China did you have unpleasant cooperation with? Can you tell me about it? Maybe you'd like to know my offer.
Any Siemens/Mentor Valor Process Preparation users on the forums? - Page 1
Forum section: electronics / general

author: ninevoltz
author_rank: Newbie
timestamp: September 21, 2023, 03:23:17 pm
content: Anybody here who uses Valor Process Preparation for programming pick-and-place equipment? Hoping to find other users to commiserate with. We acquired three Assembleon/Philips AX-201 pick-and-place machines last year for dirt cheap. Like $1,500 + freight for the lot, cheap. The catch was that we needed to purchase Valor to be able to program them. That's a USD$23,000 software package with a $2,000/year subscription for VPL (Valor parts library). I both love, and hate, this software. The learning curve was monumental. I self-taught because the training was thousands of dollars more. It can generate flawless programs for any machine on the market with under an hour's worth of work. It used to take me an entire day to create a program for our Emerald Xii machine, plus sticky tape dry runs and endless goof-ups. Anybody getting by without using a VPL subscription? I tried setting up a program once without it, and it appears to be almost impossible, by design. It grinds my gears that they made it this way with the intention of forcing you into a VPL subscription. Anyone relate?
SMT resistors codes and it sizes - i need standard reference - Page 1
Forum section: electronics / general

author: analityk
author_rank: Regular Contributor
timestamp: September 19, 2023, 08:23:43 pm
content: Helo,i'm trying find who and where specified codes and sizes for smd "standard" packages or rather for it foot prints sizes.It can be easy to find size and dimensions for 0805 packages/footprint (fp) and explanation it but who is responsible for this, defacto, standard? EIA? JEDEC? IPC? Did was wrote as ISO standard? Or it is maybe rule of thumb - but why so many chip manufacturer use it without regulations?

author: thm_w
author_rank: Super Contributor
timestamp: September 19, 2023, 09:43:54 pm
content: https://www.utmel.com/blog/categories/resistor/smd-resistors-codes-size-testing-tolerance-and-selectionhttps://electronics.stackexchange.com/questions/101079/what-standard-governs-the-dimensions-of-smt-chip-resistors-and-capacitors
Anyone ordered from Digikey - Rochester Electronics  - Page 1
Forum section: electronics / general

author: c64
author_rank: Frequent Contributor
timestamp: September 13, 2023, 04:30:44 am
content: Anybody bought Rochester Electronics parts on Digikey? Can you share your experience?And I noticed they have very odd minimum quantities for all parts. Is it 1 full wafer?Also they say thisQuoteDoes this shipping fee really apply and how much is it? Anything extra, like customs duty etc?

author: Kean
author_rank: Unknown
timestamp: September 13, 2023, 01:28:52 pm
content: Any reason you wouldn't just buy from Rochester Electronics directly? I've done that a couple of times with no problems. Is buying through Digikey cheaper?Either way, any shipping fee should be quoted at checkout. For customs fees, it will be dependant on Incoterms and destination country.e.g. Digikey ship CPT into Australia (as do Rochester I believe), whereas Mouser ship DDP.So with a Mouser order over AUD $1000 it will clear customs without extra charges, but a similar Digikey order will incur duty (just GST in this case) and some clearance fees.

author: jmelson
author_rank: Super Contributor
timestamp: September 13, 2023, 03:44:55 pm
content: I have done this a few times. One time, Rochester apparently did NOT get the order, and nothing shipped. I then ordered directly on the Rochester site, and cancelled the Digi-Key order.Yes, Rochester has their own warehouse, so it will come as a separate shipment. I know nothing about the customs implications, as I am in the US.Jon

author: Mangozac
author_rank: Frequent Contributor
timestamp: September 13, 2023, 10:15:15 pm
content: Quote from: c64 on September 13, 2023, 04:30:44 amNo it will generally be a standard pack size for the part. I.e. a full reel or a full tube.

author: aeg
author_rank: Regular Contributor
timestamp: September 13, 2023, 10:35:04 pm
content: When ordering direct from Rochester, I believe the minimum qty is based on a $250 line item minimum.

author: gnuarm
author_rank: Super Contributor
timestamp: September 13, 2023, 11:46:53 pm
content: I have bought parts from Rochester through Digikey... or maybe it was direct, I don't recall. The parts were good and a good price.Rochester used to focus on manufacturing obsolete parts. They would buy the complete process specification from the vendor who was obsoleting the parts, so they were exact replacements. I'm not sure, but they may be selling other parts as well now.

author: c64
author_rank: Frequent Contributor
timestamp: September 15, 2023, 12:56:50 am
content: Quote from: aeg on September 13, 2023, 10:35:04 pmI checked few parts. It appears you are right. Although it was $300 USD for me
Choosing magnetic pogo pin connectors - Page 1
Forum section: electronics / general

author: e100
author_rank: Frequent Contributor
timestamp: September 09, 2023, 06:26:21 am
content: Just need something for connecting proto boards together to deliver RS485 or CAN bus signalsA google image search turned lots of results with linear and concentric ring designs, but few had recognizable brand names.Is there a particular brand or design that has worked well in your own projects?

author: Smokey
author_rank: Super Contributor
timestamp: September 09, 2023, 07:06:19 am
content: Links?

author: Someone
author_rank: Super Contributor
timestamp: September 09, 2023, 07:39:10 am
content: Big band name, in stock with distributors, not obnoxious prices, yet you couldn't find them?https://www.mill-max.com/products/new/maxnetictm-spring-loaded-connectors

author: e100
author_rank: Frequent Contributor
timestamp: September 09, 2023, 08:35:58 am
content: Quote from: Someone on September 09, 2023, 07:39:10 amNever heard of that name. Have you used them in your projects? Did they work well?

author: spostma
author_rank: Regular Contributor
timestamp: September 09, 2023, 04:08:22 pm
content: I think these magnetic pogo connectors are made by CFE Corportation:https://www.cfconn.com/https://www.cfeconn.com/spring-loaded/magnetic-cableand a similar pogo-pin manucaturer:https://www.hktop-link.com/product/cable-connector/4-pin-magnetic-cable-connector.html

author: mon2
author_rank: Frequent Contributor
timestamp: September 09, 2023, 06:48:18 pm
content: Sharing details of a good company we have used for a few projects with custom pogo pins and initially met them at past trade fairs in HK. We will be going again next month.Our last contact was:Clara Chan深圳市启华科实业有限公司HONGKONG QH TECHNOLOGY CO., LIMITED / Shenzhen QH Industrial Co., LtdPhone / Wechat / Skype : +86-15019462008Email: sales1@pogopin-connectors.comWebsite:www.pogopin-connectors.comAddress: Floor 3rd, Baoyi factory, Wulian district, Long gang, 518116, Shenzhen, China.深圳市龙岗区五联社区瓦窑四路三号宝益工业区3楼

author: mon2
author_rank: Frequent Contributor
timestamp: September 09, 2023, 07:02:53 pm
content: Here is another:AmySales ManagerMob./Wechat:+86-159-1543-5407Tel:+86-755-2372-8758 Fax:+86-755-2372-8759SHENZHEN TSINGRE TECHNOLOGY CO.,LTDWeb:www.tsingre.com

author: Smokey
author_rank: Super Contributor
timestamp: September 09, 2023, 09:06:56 pm
content: Quote from: e100 on September 09, 2023, 08:35:58 amI've never used that specific product, but MillMax is legit. They have been around as a specialty pin/socket/connector company forever.
SD card slot mounting tab reflow problems - Page 1
Forum section: electronics / general

author: g00se
author_rank: Contributor
timestamp: September 06, 2023, 09:40:57 pm
content: Hello,We are starting assembly of a new design and running into issue with reflow of an SD card slot. The part is Amp/FCI GSD09002SEU. It has two small mounting tabs that are meant to be soldered down, but they lift slightly when reflowing and do not make a joint on one side. I see this type of slot very commonly, so it must be something wrong in our process. We have tried adding more paste manually to the pads before reflowing, but that did not help.Maybe some glue, a weight or tape before reflow is required?Attached are photos to show the issue:

author: 48X24X48X
author_rank: Frequent Contributor
timestamp: September 07, 2023, 12:10:07 am
content: You do have the 2 location pegs hole open?

author: g00se
author_rank: Contributor
timestamp: September 07, 2023, 12:59:45 am
content: Yes, definitely! The alignment pegs are fitting fine and the slot is sitting flush to the board before reflow.

author: g00se
author_rank: Contributor
timestamp: September 07, 2023, 01:03:37 am
content: Here is one of the boards that did create a joint (by chance)

author: ANTALIFE
author_rank: Frequent Contributor
timestamp: September 07, 2023, 02:10:03 am
content: Suspect your v-grooved tooling strips are sagging during reflow and pushing the SD card holder body up. A solution would be to make a cutout in the tooling strips so that they don't bump into the body

author: g00se
author_rank: Contributor
timestamp: September 07, 2023, 03:18:59 am
content: Hmm, yeah that may be it. I don’t know how much PCB normally flexes during reflow.I will try milling out a larger slot to allow clearance and see if that remediates the issue.Thanks

author: 48X24X48X
author_rank: Frequent Contributor
timestamp: September 07, 2023, 04:06:05 am
content: Usually for these type of pads, the stencil maker made them larger so the paste goes up to the body as well.

author: g00se
author_rank: Contributor
timestamp: September 07, 2023, 12:02:03 pm
content: OK, I have modified the milled slot on the rail to eliminate any overlap of the part. Will try this and see if it helps.

author: I wanted a rude username
author_rank: Frequent Contributor
timestamp: September 08, 2023, 01:26:40 am
content: And when that side doesn't solder, the socket doesn't retain the SD card (the card just pops back out)? I've seen that exact failure mode on an eval board. That SD card socket just seems like a bad design.

author: g00se
author_rank: Contributor
timestamp: September 08, 2023, 04:47:06 pm
content: The SD mechanism does still work and the card inserts and ejects as designed.The problem is that the slot has less mechanical support on that end and it is possible that the force of insertion will bend the slot and/or rip the other pad off the board.In our design the slot sits behind a metal enclosure, so the amount of force the slot can receive is limited. I am also designing a clip that fits over the pcb and end of the slot to add reinforcement.
Hdmi or edp to mipi ic - Page 1
Forum section: electronics / general

author: loki42
author_rank: Frequent Contributor
timestamp: September 06, 2023, 01:24:54 pm
content: I'm looking at some SOCs / SOMs that only have edp or hdmi out. I need to connect them to a mipi screen. Can anyone recommend an IC? Lowish volume (<3000 units)

author: Gribo
author_rank: Frequent Contributor
timestamp: September 06, 2023, 05:16:47 pm
content: Are you looking for something like this?https://wiki.somlabs.com/index.php/SL-MIPI-LVDS-HDMI-CNV-11_Datasheet_and_PinoutEdit: IC link:http://www.lontiumsemi.com/hdmi/

author: loki42
author_rank: Frequent Contributor
timestamp: September 06, 2023, 10:12:41 pm
content: Those look good, however I can't seem to find anything with stock at distributors (Mouser, arrow, Digi-Key)Oops just as I posted this I realised they might be Chinese, so checked lcsc and they have a little stock so I've got an idea of price, thanks!

author: up8051
author_rank: Frequent Contributor
timestamp: September 06, 2023, 11:17:01 pm
content: Lontium has interesting chips but unusual chips firmware solutions.You must sign the NDA to receive the documentation.But that's not enough to create a device based on their chips.You have to provide them with the circuit diagram and documentation of the display and required initialization procedure then they will generate the firmware for you.I couldn't go through the whole process.BR JarekC

author: loki42
author_rank: Frequent Contributor
timestamp: September 07, 2023, 10:20:26 am
content: Oh that's interesting. I guess that makes sense if the display chip doesn't have a way of passing all the panel parameters in. Mipi drivers are annoying to implement.Did you find another solution?

author: up8051
author_rank: Frequent Contributor
timestamp: September 07, 2023, 10:28:54 am
content: No.I have TangNano 9K (Gowin PFGA) conected to MIPI 8,8" Bar LCD using a Chinese HDMi - MIPI converter (based on Lontium, although the markings are blurred).I planned to put the Lontium chip directly on my PCB but after contacting the manufacturer I gave up.I plan to connect directly to the FPGA, a few days ago Gowin provided the MIPI DSI TX IP, but there is still no documentation available.BR JarekC
Slot feature in Altium? - Page 1
Forum section: electronics / general

author: Faringdon
author_rank: Super Contributor
timestamp: September 04, 2023, 06:15:04 am
content: Hi,Have been told that the "slot" feature in Altium is no good, and to get a slot, you need to do an outline in the layer that you use for the board outline. Is this right?

author: MR
author_rank: Regular Contributor
timestamp: September 04, 2023, 07:02:40 am
content: I just draw it on the corresponding mechanical layer and for safety write rout out into the slot. I never had any problem with that.You don't give the 3D model to the manufacturer, but the gerber files - so just think what will be on the gerbers.

author: Psi
author_rank: Super Contributor
timestamp: September 04, 2023, 07:18:33 am
content: I've never had an issue with Altium and slot drills in the NC file for PCBway orders.But it may depend on your Altium version and the software the board house is using to read the file.

author: Fire Doger
author_rank: Regular Contributor
timestamp: September 04, 2023, 10:20:19 am
content: Slot feature in Altium is just fine.If your manufacturer wants them in a specific way do it as they want.JLC has no issue with it.*Be careful on what is slot shaped pad and what is a cutout.They have different machines for milling and drilling.Pad slots have limitations. If you want a big hole then it's a cutout and must be drawn accordingly.

author: ajb
author_rank: Super Contributor
timestamp: September 06, 2023, 05:05:47 pm
content: Are you talking about a plated slot, like for a connector footprint, or a routed slot, like for creepage or for part of the board outline? As Fire Doger says, there's a difference in how those are fabricated. If the slot should cut be done as part of the routing, then draw it on the outline/routing layer, and it's not a bad idea to write "CUT OUT" or something inside the area that should be cut out. If it should be plated as part of a footprint, use a slot type pad.
Inside JLC China Flexible Circuit Board Factory, process steps walk. - Page 1
Forum section: electronics / general

author: thm_w
author_rank: Super Contributor
timestamp: September 05, 2023, 10:28:59 pm
content: The crazy part is the manual labor, compared to their regular PCBs. Seems with boards this small there is no easy way (yet) that they can avoid hand placing backings and manually sorting each of the small flex boards.They still drill the flex, but they laser route the outer dimension. At what point would laser drilled holes make more sense? I remember this was brought up here before, but for regular PCBs. Though in this case it seems very very fast to laser cut the polyamide.
Unusual inductor footprint on PCB - Page 1
Forum section: electronics / general

author: Faringdon
author_rank: Super Contributor
timestamp: September 03, 2023, 08:43:24 pm
content: Hi,A company sent in a PCB with the attached inductor footprint on it...its in a 24v to 5v buck of <5w.Why have they done diagonal pads when the recommended pads are not so?Its inductor wurth 74477820https://www.we-online.com/components/products/datasheet/74477820.pdf

author: langwadt
author_rank: Super Contributor
timestamp: September 03, 2023, 08:57:28 pm
content: why are you asking here instead of asking them?

author: brabus
author_rank: Frequent Contributor
timestamp: September 03, 2023, 09:10:42 pm
content: I had a similar occasion once, the inductor had to be placed at an angle due to tight space constraints in the molded plastic case. Electrolytic caps gave me more than a headache as well.Does your PCB look particularly tight? Is the contour oddly shaped? Or is it nicely rectangular with plenty of space?

author: cearlobe
author_rank: Newbie
timestamp: September 04, 2023, 12:14:01 am
content: Looks like a dual footprint to allow for alternate components to be loaded. The rotation might be an effort to make them more alike in the 3D sense.

author: wraper
author_rank: Unknown
timestamp: September 04, 2023, 12:22:49 am
content: This should be mechanically stronger than recommended footprint. I don't know the reasoning but in high vibration environment or in tough portable devices which may be dropped this can be an advantage.

author: jc101
author_rank: Frequent Contributor
timestamp: September 04, 2023, 04:25:52 pm
content: Wurth supplies Altium libraries for all their parts, schematic and PCB footprint, and 3D models for most. Download the one from them and see what it says. I wonder if someone has taken the datasheet and drawn that manually. Generally, for Wurth parts, I use their supplied footprints.

author: gamalot
author_rank: Super Contributor
timestamp: September 04, 2023, 07:15:30 pm
content: Quote from: cearlobe on September 04, 2023, 12:14:01 amTo me this answer is the most reasonable one.

author: Kean
author_rank: Unknown
timestamp: September 05, 2023, 02:50:32 am
content: It seems like the footprint designer ignored the datasheet recommended land pattern and instead used the bottom pad dimensions.It will certainly be stronger than the tiny recommended PCB footprint, but as the pads on the inductor are not completely flat it may not make a lot of difference (depends on paste layer).

author: thm_w
author_rank: Super Contributor
timestamp: September 05, 2023, 10:46:27 pm
content: Quote from: brabus on September 03, 2023, 09:10:42 pmYou can see the silkscreen is square.Quote from: Kean on September 05, 2023, 02:50:32 amYeah. If the solder wets properly the datasheet recommendation is strong enough for an inductor this small (7x7x3mm) in even relatively rough environments IMO. I can't recall one falling off.and as you say there is a small gap in the middle, on the inductor here its not much, ~0.1mm, but could still be enough to not solder that area. Not sure on that.
Wave-soldering small-pitch ICs? - Page 1
Forum section: electronics / general

author: sgnka
author_rank: Contributor
timestamp: September 04, 2023, 08:01:01 am
content: Was wondering what the minimum pitch is that can we get down to with glue SMT+wave soldering processes without jumping through hoops to make it work reliably? Good idea to try 0.65mm TSSOPs? And has anyone here tried doing QFPs with the 45 degree placement method?

author: Warhawk
author_rank: Frequent Contributor
timestamp: September 04, 2023, 08:05:49 am
content: I think you should better ask the assembly house. Is wave soldering still the thing? Please note that it requires often custom footprints and quite a lot of experience (from the fab house). It is OK for things like power supplies but I would stay away from it for standard boards.I assume you already have experience with wave soldering - why do you consider this? Is the cost really that different?

author: sgnka
author_rank: Contributor
timestamp: September 04, 2023, 09:11:04 am
content: Quote from: Warhawk on September 04, 2023, 08:05:49 amYes, we wave solder a lot of boards, mostly power electronics, with SOT23 and 0.05" SOICs without issue. In many cases the boards are single-sided because they're simple enough to not need 2 layers, so we can't do both paste and wave-soldering processes. The difference in cost wouldn't be in the paste process but in making the boards double sided. just for the small-pitch micro-controllers.

author: SMTech
author_rank: Frequent Contributor
timestamp: September 04, 2023, 10:18:02 am
content: No experience, however we've definitely seen wave soldering used on something around the 0.65mm pitch on some rework we processed, they used special footprints and 45degree on a QFP, what we don't know is what custom tooling they used in the wave...I suspect much finer than that gets much trickier hence more specialist dipping or selective techniques exist. Given you have existing experience you should be able to pool that knowledge with advice from your tooling supplier (assuming you use one) to evaluate how effective you can get the process.
Groove cutting vs laser cutting a PCB out of the panel? - Page 1
Forum section: electronics / general

author: Faringdon
author_rank: Super Contributor
timestamp: October 01, 2023, 01:48:27 pm
content: Hi,Just re-done a SMPS PCB due to obsolete control chip. The original PCB , 9cm by 14cm, fits nicely between 2 metal rails 14 cm apart, on the earthed enclosure ,…the PCBs were groove cut to depanelize them. They slid nicely between these rails.The replacement PCB is exactly the same dimension as the original, but it was laser cut out of the panel , instead of groove cut….and due to this, it is a very very tight fit to get it to slide between the rails. I fear we are stressing the PCB to get it between the rails. I wonder if I should reduce the PCB length from 14cm to 13.99cm, in order that it will definitely fit nicely?…or should we just realise that when groove cut, it will slide in fine?
LQFP100 chip on 2oz copper? - Page 1
Forum section: electronics / general

author: Faringdon
author_rank: Super Contributor
timestamp: September 03, 2023, 11:39:40 am
content: Hi,can an LQFP100, STM32 micro be footprinted , without great extra expense, on 2oz copper?LQFP100 STM32https://www.st.com/resource/en/datasheet/stm32f103v8.pdf

author: Psi
author_rank: Super Contributor
timestamp: September 03, 2023, 12:51:06 pm
content: Shouldn't be a problem.PCBway will do 7/7mil on a normal 2 oz PCB and that's 0.178mm. Your LQFP100 has a leg width of 0.220mmI've had them do 0.25mm on 3oz before, but it's pushing things (for them) and I think they did charge me a small amount more.
Adhesive recommendations for bonding acrylic to PCB and metal? - Page 1
Forum section: electronics / general

author: g00se
author_rank: Contributor
timestamp: September 01, 2023, 01:13:28 pm
content: I need to bond some acrylic pieces (a retaining clip, LED window) to the back of a metal enclosure and to PCB. I looked at the wide array of Loctite products, but I'm not sure how or what to choose for this application.I'm looking for recommendations. Preferably non-conductive, UV curing, med-high viscosity(shouldn't run before curing), some flexibility after curing.For example, I (randomly) looked at something like Loctite AA 3526, but I have no idea!https://www.henkel-adhesives.com/us/en/product/uv-curing-adhesives/loctite_aa_35260.htmlThanks for any tips!

author: loki42
author_rank: Frequent Contributor
timestamp: September 01, 2023, 03:47:03 pm
content: Not sure if it'll suit you but we use 3M LSE tape for this. Bonds we'll to aluminum and pcbs.

author: g00se
author_rank: Contributor
timestamp: September 01, 2023, 04:17:17 pm
content: Thanks, I had been considering it, but the small piece that would be required may be very annoying to deal with.Here is an example of the window I am referring to:

author: thm_w
author_rank: Super Contributor
timestamp: September 01, 2023, 09:47:49 pm
content: Does the window pass enough UV to allow it to cure?http://www.plasticgenius.com/2011/05/infrared-and-ultraviolet-transmission.htmlIs that powder coated metal? sometimes it can be hard to glue to that.The one you linked says heat cure is an option as well:QuoteShore Hardness: 62 Shore D3103 slightly more flexible (51 shore).https://www.mcmaster.com/products/loctite-ultraviolet-curing-adhesives/

author: loki42
author_rank: Frequent Contributor
timestamp: September 02, 2023, 12:17:52 am
content: Yeah it can be fiddly. We laser cut ours and have some non stick coated tweezers.

author: David Hess
author_rank: Super Contributor
timestamp: September 02, 2023, 12:20:14 am
content: We used to use the acetic acid curing version of silicone rubber for that, but our windows were much larger.

author: g00se
author_rank: Contributor
timestamp: September 03, 2023, 11:40:45 am
content: I tested with some 3M LSE, and that may work well enough.Since I have a few displays in a row, I can use one longer piece and limit the number of small pieces.Thanks
Latest Electronic Components Magazine from Global Sources - Page 1
Forum section: electronics / general

author: mon2
author_rank: Frequent Contributor
timestamp: July 01, 2023, 12:23:47 pm
content: Sharing the latest Global Sources Electronic Components magazine as a FYI for new readers.Often, many of these suppliers attend the pending fair in April / October of each year.September / 2023 edition is posted:https://we.tl/t-gvkkaCyHAW

author: mon2
author_rank: Frequent Contributor
timestamp: September 01, 2023, 06:57:48 pm
content: Active link for a week from now:https://we.tl/t-gvkkaCyHAW
Bottom solder mask overlaps (via next to pad) - Page 1
Forum section: electronics / general

author: Faringdon
author_rank: Super Contributor
timestamp: August 31, 2023, 06:01:31 pm
content: HiWill we get solder wicking with this?...it is bot solder mask at 0.1 mm grid.The via and the pad are of the same net.

author: asmi
author_rank: Super Contributor
timestamp: August 31, 2023, 07:28:35 pm
content: Quote from: Faringdon on August 31, 2023, 06:01:31 pmYou will never know unless you try, as it depends on manufacturer's tolerances and some luck.

author: gnuarm
author_rank: Super Contributor
timestamp: August 31, 2023, 09:23:37 pm
content: Quote from: Faringdon on August 31, 2023, 06:01:31 pmYou also need to show the copper layer.Do you have design rules for the various spacing?

author: wraper
author_rank: Unknown
timestamp: August 31, 2023, 09:38:04 pm
content: Use tented vias for this. Solder resist bridges this narrow are not manufacturable. Even third via in the middle would need quite advanced process for uninterrupted resist bridge with nearby pad.

author: wraper
author_rank: Unknown
timestamp: August 31, 2023, 09:42:44 pm
content: Quote from: asmi on August 31, 2023, 07:28:35 pmNobody will make something like 0.03mm solder mask bridge though. And on the left side there is no uninterrupted bridge to begin with. I see no reason reinventing the wheel and not just using tented vias.

author: Kim Christensen
author_rank: Super Contributor
timestamp: August 31, 2023, 09:48:16 pm
content: Was this designed on a Sunday, in London, on a 14 inch laptop?

author: thm_w
author_rank: Super Contributor
timestamp: August 31, 2023, 10:28:33 pm
content: Quote from: Kim Christensen on August 31, 2023, 09:48:16 pmYeah I was there, ignore the weird distortion its just my 14 inch laptop camera lens
PCBSynergy has moved! - Page 1
Forum section: electronics / general

author: sarason
author_rank: Contributor
timestamp: August 31, 2023, 07:30:47 am
content: PCBSynergy has moved.PCBSynergy is moving to its own domain.I have securedhttps://PCBSynergy.comSame great software, just a new location.And if you don't know PCBSynergy converts CAD PCB designs (14 CAD companies products) to run-able SMT programs for a large( in excess of 80)SMT machines.sarason
JBC AD2200 Version 2.1 tips  - Page 1
Forum section: electronics / general

author: MihaiSs
author_rank: Contributor
timestamp: August 26, 2023, 09:22:34 am
content: Hi everyone,I managed to get my hands on a JBC AD2200 Version 2.1 with a 2210 handpiece. Does anyone know which tips will fit into this handpiece? I tried to search but there are a lot of variants with different codes for the new versions.Also, can I use a "newer" version handpiece on the station?Thanks!

author: MihaiSs
author_rank: Contributor
timestamp: August 28, 2023, 02:10:04 pm
content: Update:The original handpiece (2210) works almost perfectly with the C210 tips. I say almost perfectly because the standby feature does not work 100%. I still have to do some temperature measurements and come back with another update.I also tested the JBC AD2200 with a newer T245-A handle and it works the same, almost perfectly. The only thing here is still the standby or sleep function not properly working. What happens is that the "Ready" LED is not fully going dark, it switches at a frequency that the eye can see. The tip temperature drops, but I still have to measure if it drops the same as the original tip or not.Any suggestions are more than welcome

author: MihaiSs
author_rank: Contributor
timestamp: August 29, 2023, 06:54:57 am
content: Update number 2:I measured the temperature of the original tip in both on and sleep state. In on state it reaches the set temperature and in sleep state it cools completely (Ready LED full off).I then changed the tip with a new C210 tip and it seems that even if the "Ready" LED is flickering, the tip seems to drop the temperature just as the original one.I also tried the same measurement with a T245 hand piece and it behaves the same, temperature works great and with the LED flickering, the temperature drops when the handle is grounded.I would call this normal operation but I will still investigate to see the cause of the flickering and if it can be solved.

author: Arts
author_rank: Regular Contributor
timestamp: August 29, 2023, 11:56:13 pm
content: That is a great station! I have the matching DS5300 desoldering stationAccording to my (often faulty) memory, the C210 & C245 cartridges are "supposed" to be compatible with the older versions.The manual describes the sleep function, but doesn't specify the sleep temperature;https://www.jbctools.com/pdf/manual_AD2200_120v.pdf

author: MihaiSs
author_rank: Contributor
timestamp: August 30, 2023, 05:11:34 pm
content: Quote from: Arts on August 29, 2023, 11:56:13 pmThe DS5300 looks really nice! I was not aware how good these older JBCs are until I started to use this one.Thanks a lot for the manual! It seems that I got it wrong and the LED pulsing means that the sleep function actually works. It seems now that with the older tip the sleep function was not working correctly, since both LEDs turn off after a few seconds. Sounds great, I have a working soldering station
MPM - Page 1
Forum section: electronics / general

author: dimamalin
author_rank: Newbie
timestamp: August 28, 2023, 10:41:29 am
content: Our company has purchased five new MPM printers (2 BTB ,3 HiE)and a common issue for all the machines is the offset changes.Whenever we start working with an existing program, we always need to adjust the offsets.How can we avoid this?

author: loki42
author_rank: Frequent Contributor
timestamp: August 29, 2023, 10:15:14 pm
content: If you bought 5 of them I recommend chatting to your supplier! I never need to adjust offsets on my mpm acella. Are you putting the stencils in against the back stop?
Backside Power Delivery (CPUs) - Page 1
Forum section: electronics / general

author: cbassett1000
author_rank: Contributor
timestamp: September 01, 2023, 05:37:02 pm
content: I've recently seen some things come out about backside power delivery (PowerVia branded) for the next gen CPUs. Supposedly this will help will voltage drop and signal interference. But comes at a thermal cost of the transistors being in a middle layer of the board, but allows power traces to be larger and signal traces to not be interfered with by power.Can anyone chime in and talk about the complications, difficulties, and things? I've seen a mention of the impedance calculations will get thrown out the window for the new CPUs.

author: thm_w
author_rank: Super Contributor
timestamp: September 01, 2023, 09:31:52 pm
content: https://spectrum.ieee.org/backside-power-deliveryAre you talking about the design issues within the silicon itself? I don't think many here would be able to comment.

author: cbassett1000
author_rank: Contributor
timestamp: September 01, 2023, 09:59:12 pm
content: Yes. Sorta, but I'm wondering how hard it's going to be to produce. It's an intriguing product and I feel like there is going to be so many complications from design to manufacture.
Unknown type of PCB contact - Page 1
Forum section: electronics / general

author: forumflaneur
author_rank: Newbie
timestamp: August 24, 2023, 07:52:19 am
content: Hello,Does anyone know what type of PCB contact this one (attached) is ?Thanks for looking at it.

author: SMTech
author_rank: Frequent Contributor
timestamp: August 24, 2023, 09:09:12 am
content: Clue bottom left is "FPC" so its going to be one of those fiddly little ribbon sockets you find in phones & laptops
Do battery holders for oversize 18650 batteries exist? - Page 1
Forum section: electronics / general

author: e100
author_rank: Frequent Contributor
timestamp: August 18, 2023, 03:56:40 am
content: As far as I can tell, regular 18650 battery holders are only long enough for standard 65mm long lithium batteries.However, protected lithium batteries sold for use in consumer gadgets appear to be repackaged 18650 batteries with an extra 5mm added to the end for the protection circuitry PCB. Effectively they don't adhere to any standard.Has anyone seen battery holders that are multi-size capable?

author: Gribo
author_rank: Frequent Contributor
timestamp: August 18, 2023, 02:02:09 pm
content: Will something like this be good for you?https://www.keyelco.com/product.cfm/12V/550TR/product_id/837

author: newto
author_rank: Regular Contributor
timestamp: August 18, 2023, 02:05:51 pm
content: Quote from: Gribo on August 18, 2023, 02:02:09 pmThis was going to be my suggestion too:https://www.digikey.ca/en/products/detail/keystone-electronics/54/2254090I don't know of any pre-assembled products, but these days it's pretty quick to have a PCB made up and solder clips with your own spacing (if you know how to use PCB software and a soldering iron)

author: e100
author_rank: Frequent Contributor
timestamp: August 18, 2023, 02:39:35 pm
content: Quote from: Gribo on August 18, 2023, 02:02:09 pmIt would be OK on the negative end , but on the positive end I'd be worried about the spring clip damaging the insulation and forming a short circuit.

author: thm_w
author_rank: Super Contributor
timestamp: August 18, 2023, 09:01:05 pm
content: I would expect them to fit in the cheapo spring style ones:https://bc-robotics.com/shop/3-x-18650-battery-holder/But they have no reverse polarity protection.Looks like you can get a holder with built in PCB as well:https://robotbits.co.uk/product/battery-holder-li-ion-18650-battery-holder-1s1p-with-pcb/

author: e100
author_rank: Frequent Contributor
timestamp: August 20, 2023, 06:48:04 am
content: Finding anything that actually lists the internal dimensions is a challenge.I found this datasheet for a holder that claims to be compatible, however to me it looks like the contacts will be crushed as there is only 1.5mm clearance at either end of a 70mm battery.https://www.memoryprotectiondevices.com/datasheets/BK-18650-PC4-datasheet.pdf