Electronics Forum: second (Page 41 of 241)

Regarding the choosing of right Suface Finishing

Electronics Forum | Wed Apr 29 02:57:05 EDT 2015 | jandon

Immersion tin is very sensitive for handling, scratches, storage condition and time, thermal influence and washing. You will get problems in second reflow if you have double sided PCB with immersion tin surface finish.

PCB Surface Finishing for good solderability & rework

Electronics Forum | Wed Jan 13 04:07:58 EST 2016 | crystalpcb

Hi Syed, I'm a PCB engineer from China. First:Immersion gold surface finish is the best for PCBs. Second:HASL(Lead-Free HASL) Then:HAL(with lead) The cheapest surface finish is OSP(After 15 days will be oxidized)

Thinking of changing Pick and Place from Quads

Electronics Forum | Fri Jan 08 07:41:27 EST 2016 | nonford150

Have to second Phil's assessment of Juki. Been running for over 10 years; rarely break; when they do service is quick. Maintenance costs are consistently 15% of our sister companies running Fuji.

Flux splatter issues

Electronics Forum | Fri Feb 05 11:39:34 EST 2016 | steprog

I thought it might be the oven too, except it seems the splatter is too small for drips from the oven, secondly, when I ran a couple of bare boards among the populated boards we saw no splatter or flux contamination. So it seems it comes from the bo

GSM AXIS ERROR

Electronics Forum | Mon May 09 12:31:29 EDT 2016 | ttheis

You may want to search the UIC knowledge base for troubleshooting. If you do not have access to UIC's website (second hand machine) you can call and register your machine for $500.

Reflow oven profile

Electronics Forum | Tue Jan 31 08:28:29 EST 2017 | emeto

That is why we don't care if it is Top or Bottom. We call them first (process) side and second (process) side. Often you will have tall and heavy parts on both sides, so you will have to glue them.

QUAD 4c big placement delay

Electronics Forum | Wed Apr 26 09:18:19 EDT 2017 | dentata911

Hello Is it possible to make really big placement delay on this maschine? 3-4 seconds? Thank you.

QUAD 4c big placement delay

Electronics Forum | Wed Jun 07 04:44:23 EDT 2017 | dentata911

Thank you for your answer. But maximum value for modcode 7 is 255. 255x3.3 msec is 0.8 sec. And I need 2-3 seconds...

Component Drop on Second side of the reflow

Electronics Forum | Sun Aug 13 01:32:57 EDT 2017 | sankarseptember

These two components are tallest among other components.Is there any method to check pad size required according to component leads?

Component Drop on Second side of the reflow

Electronics Forum | Mon Aug 14 04:00:25 EDT 2017 | sankarseptember

We check the TDK data sheet reflow profile condition. We check the PCB surface temperature the max temperature is 237.Anyhow We will confirm it by check temperature on TDK point


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