Electronics Forum: coatings (Page 196 of 225)

machining durastone pallets

Electronics Forum | Thu Feb 09 10:13:37 EST 2017 | swag

Agreed. We machine all our pallets in coolant. No dust but a big mess still results in the bottom of the CNC. You'll burn through a thousand cutters if you try it on a router table. Just doesn't seem feasible. You'd have to take like 0.020" dept

PCB Design Question - Hard gold or ENIG for keypad button contacts

Electronics Forum | Tue Feb 21 01:32:49 EST 2017 | soldertraining

Looking for advice on soldering lead free paste to a board with very heavy gold plating, In my opinion, Gold contact surfaces are often used on circuit boards with membrane switches which is a choice of technology for industrial, commercial and consu

QFN84 Solder Printing Issue (QFN with Inner LGA Pad)

Electronics Forum | Wed Nov 15 12:52:21 EST 2017 | georgetruitt

IMO – Look into nano-coatings for your stencil and radius all square apertures This should help out with solder paste releasing from the stencil helping with insufficient solder QFN LGA aperture design, try a stencil cut with a few different apertur

Possible to mix a No-Clean solder and a Clean solder process

Electronics Forum | Fri Apr 06 12:31:07 EDT 2018 | deanm

Your fluxes are required to be compatible per J-STD-001. I wouldn't even attempt mixing no-clean (rosin) and clean (assuming water soluble) fluxes on the same assembly, especially if the fluxes are from two different vendors. If your paste and liquid

Juki KE750L T/Z Axes problems - Please help!!

Electronics Forum | Sun Sep 01 22:02:58 EDT 2019 | sarason

Have you got a circuit diagram for your driver board? If not measure your driver into a resistive load and look for differences in current flow voltage drops under load dried out caps. Dead current measuring circuits etc. If you see an IC, look it up

conformal coating over inspection stamps

Electronics Forum | Thu Jun 27 08:47:21 EDT 2019 | SMTA-John

Having success with Circuit Boards #432 Solvent Resistant Ink - Designed specifically for circuit boards. This medium dry ink is highly resistant to solvents .... It is also non-conducting. Note: this ink contains an aggressive solvent so should not

solution to design challenge (ubga, NSMD pads, heavy traces)

Electronics Forum | Wed Mar 18 11:27:24 EDT 2020 | slthomas

I am about to order a stencil and I can already see that I'm going to have issues. I'm hoping someone has a recipe for this scenario that we haven't tried yet. The parts are 16 mil pitch bga's, the pads are NSMD (10 mil dia. with 12.6 mil mask open

Electronic Assembly - PCB cleansing and COVID-19

Electronics Forum | Fri Apr 03 08:34:54 EDT 2020 | SMTA-Gregory

We need to be careful with product to avoid introducing a new failure mode, namely corrosion and dendrite growth, especially those running no clean processes! In addition to heat (reflow, wave and some selective soldering processes) killing the vi

DEK conveyor belt

Electronics Forum | Wed Jul 15 03:17:47 EDT 2020 | wellmanrau

We have been producing the SMT machines and intelligent equipment for many years, integrated Design, R&D, Production, Sales and Technical Service. What products we manufactured are: SMT Printer/Stencil Printer/Solder Paste Printer, Pick and Place Mac

How to make transformer bobbins?

Electronics Forum | Fri Jul 24 08:19:55 EDT 2020 | jordanabshire

I often need to wind a coil for transformers, solenoids, or chokes, & I typically use craft plywood for the ends and a paper tube for the center, cemented with wood glue, or Cyanoacrylate . Then, I usually give it a coat of varnish or epoxy. I am cur


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