Electronics Forum | Wed Apr 24 06:19:56 EDT 2019 | kayvee
I don't profess to be an expert, just I remember a few things when a ran the CP40 some years ago. Also check the PC, I remember mine had some intermittent connection issues between the cards in the ISA slots, and re-seating them sometimes helped.
Electronics Forum | Wed Apr 24 10:57:11 EDT 2019 | scotceltic
Thanks Steve for the candid reply. We would probably end up dealing with the rework in house so that is why I want to make it easy from the get go instead of jumping through hoops like I know a lot of EMS vendors like yourselves have to do for their
Electronics Forum | Thu Apr 25 17:17:44 EDT 2019 | spitkis2
Years ago it was common to see 2-3mm keep out areas around BGAs. Now with boards being so densely populated there are no clearance minimums. Regardless if the machine is using convection or IR heating, parts can be reworked without affecting adjace
Electronics Forum | Fri Apr 26 05:50:54 EDT 2019 | ppcbs
We just apply tacky flux to the surrounding components and to the bottom side components under the BGA. This will prevent cold solder if any solder joints reach reflow temperature the surface tension will keep them aligned and in place. If you nee
Electronics Forum | Wed Apr 24 21:33:02 EDT 2019 | pcbindex1
With the upcoming of the traditional peak season(Q3), a rising price among the mainland factories, and a continual rise in the bronze price in the London Metal Exchange in August, there is also a trend for the rise in the quotation of the PCB’s upstr
Electronics Forum | Thu Apr 25 01:20:58 EDT 2019 | smith88
I am having fractures in my tantalum caps, I believe it is from out fading but I am having a hard time convincing others. Where they are not hermatically sealed are thes fractures a concern? Moisture is entering the body regardless of the fractures?
Electronics Forum | Thu Apr 25 11:30:09 EDT 2019 | davef
Numerous technical papers on the web document the moisture sensitivity of tant caps. Here's one: https://nepp.nasa.gov/DocUploads/CE5125B5-E0EB-4CFA-8867BE3F3E342CA5/moisture%20effect%20Ta%202C%20M.pdf
Electronics Forum | Fri May 03 12:08:59 EDT 2019 | reckless
Normally I am Champagne taste on beer budget. But I am beginning to want a no nonsense pick and place machine and willing to pay for it. But I feel there is a disparity as some machines run ~$100k (universal/hanwa) and others run ~$400k (Yamaha/Fuj
Electronics Forum | Sat May 11 19:35:24 EDT 2019 | reckless
I heard Hanwha cph figures are the extremely overrated. I was told to divide their numbers by 3 to get real world speeds. They list HM520 at 80k so dividing it by 3 it will only be 26k. That doesn't sound that fast to me especially for 2 turret he
Electronics Forum | Wed May 22 10:35:11 EDT 2019 | reckless
I fully agree on reliable machine being better. Trying to understand which machines are more reliable has been an issue. Mychronic and europlacers dont seem that popular in US. I am not requiring turrets but I have a need for reliable speed on 040
