Electronics Forum: adds (Page 81 of 163)

QFN welding problem by reflux oven 10 zones

Electronics Forum | Tue Feb 11 11:40:21 EST 2020 | emeto

Sebas, on your profile you have listed U2, U101, U102 and I was wondering if the questioned part is one of them. I attach a typical profile specs - you should follow the one for your paste. In the one you attached the slope is too fast, soak is prob

omit stencil apertures to hand solder or paste, reflow then solder.

Electronics Forum | Tue Feb 25 12:15:42 EST 2020 | dwl

Are you running a no clean process, or are you washing your PCBs? One caveat with ENIG is sometimes washing with hot DI water can effect solderability later on. I would also talk to your solder technicians and see what their preference is. Some pr

Unisoft - www.unisoft-cim.com

Electronics Forum | Fri Apr 03 15:49:55 EDT 2020 | unisoft

Yes agreed you're 100% right on that. You always want to go for the full CAD file or the XY rotation file first. But like a lot of contract manufacturers and some OEM's find they have to work with Gerber only data for certain projects. The Unisoft s

Stencil design

Electronics Forum | Thu Sep 17 15:21:50 EDT 2020 | lpbro

For height, I start +-2mil usually. For 3mil stencils, my lower limit starts at 1.5mil, upper is 5. If the area is chem ethed, I normally add .5 to the stencil height. My default volume is 60 - 160%. Then print specs are adjusted till I see fit, then

Yamaha YV88X / Philips Assembleon EMERALD-X optimalization problem

Electronics Forum | Wed Apr 21 16:59:49 EDT 2021 | compit

Hello. I want two elements to be PERMANENT at the back (e.g. position 107 and 114) and the rest at the front. Unfortunately optimization always "adds" other elements to the rear, even though I choose the preference at the front. Setting elements as "

Faster Reflow?

Electronics Forum | Thu May 13 20:00:26 EDT 2021 | glasscake

How are you specifically reflowing the boards now? You say convective reflow is not repeatable/suitable for a robot(which I'm not sure is true but I do not know what you mean by for a robot) but you also say that you are using "the fastest hot air

SMT parts order quantities rules

Electronics Forum | Thu Aug 19 20:28:27 EDT 2021 | stephendo

We have it set up in our ERP system. When it produces the Work Order it adds whatever extra parts we say. And we have a relatively inexpensive system I would think most systems for electronic manufacturing would have that ability. A few lifetimes

Looking for X-ray Inspection System - Which brand? Model? Open Tube vs Closed tube? What should be the deciding factors to take

Electronics Forum | Thu Oct 14 14:11:33 EDT 2021 | SMTA-64387257

Hi All, We are currently looking to add an Xray inspection system into our process. We build high density assemblies with ultra fine pitch BGAs, 0201's, QFN's and every package type one can think of. We would like to use the inspection system to v

Q on Yamaha P-tools

Electronics Forum | Mon Mar 21 20:22:20 EDT 2022 | kumarb

then would crash everytime. Not to give up, started to experiment with the markers inside the vios text file. The hack was to remove the MARK fields inside the file. After this, saw the component layout in the GUI PCB view with proper references. S

Flux Stone storage

Electronics Forum | Thu Apr 21 20:45:09 EDT 2022 | SMTA-68235204

Hello: I am wondering what you all do with your flux stone at the end of the day? Do you remove the unit and store it in DI water or your thinner for the flux? Do you leave the stone in and just add your thinner to get to the correct specific gravity


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