Electronics Forum | Fri Jan 11 02:19:54 EST 2019 | jlawson
Jetting paste is no easy , ball mesh size and metal loading, SG and the dynamic rehology of the flux medium need to be matched to the jetting forces from the dispensing system. There are many jetting valve makers Musashi from Japan, Nordson Lyquidyn
Electronics Forum | Thu Sep 13 13:04:52 EDT 2018 | jrs192
Hello! Recently started buying PCBs with peelable mask to remove the need for Kapton tape. Had no issues with our first batch, but our supplier has over-cured the second batch - it comes off in tiny bits, and is stuck in the holes. After timing the
Electronics Forum | Tue Sep 25 23:09:23 EDT 2018 | franknguyen
Hi, We are PCBA production company which factory's located in Vietnam. Somtime, we have to analyse failure of product to find out the root cause (ex: Micro-crack of solder joint under BGA IC...). We are searching labs around Asia (Vietnam, Malaysia,
Electronics Forum | Wed Oct 17 09:59:12 EDT 2018 | dnachristen
That's incorrect. 3D aoi is extremely useful for determining solder flow and slope which a 2D can't do. Yes it's also great for coplanarity, tomb stoning, head and pillow and a multitude of other defects. Most 3d AOI use cad models and height measure
Electronics Forum | Sat Oct 20 19:33:59 EDT 2018 | reckless
My pick and place machines are 10+ years old so I might be in the crappy department. I wasn't looking for a complete fool proof system, I am looking for aoi on a tiny budget that covers majority of scenarios. We will have to be mindful of solder sl
Electronics Forum | Fri Jan 04 09:34:45 EST 2019 | ameenullakhan
Hi , thanks.. yes you are right.Its bot and top side. Decreasing the lower heaters and increasing the top heaters for secondary side. will this matter in convection reflow ovens. Since the heat at the end will get equally distributed. We were s
Electronics Forum | Fri Jan 04 22:23:23 EST 2019 | ameenullakhan
Hi, Here we take profile for every changeover. And we compare it with our profile.For the oven performance. We daily take a minimum of 3 profile for one oven. We have High mix low volume production. We are using ORH1 ( organic flux with halid cont
Electronics Forum | Tue Jan 08 08:52:30 EST 2019 | ameenullakhan
Hi Steve, We did the below trials today. 1. Run the board in O2 environment. result : Yellowish appearance was observed. After DI water Cleaning : Still the yellow color is there. 2. Same board run secondary side. Result : First side board yel
Electronics Forum | Wed Jan 09 11:16:02 EST 2019 | slthomas
Sounds like you're making progress! The one thing that you might still want to investigate is the cleanliness and surface finish quality (and chemistry) of the pcb you're building with. You haven't said whether this board was purchased through yo
Electronics Forum | Tue Jan 15 14:11:12 EST 2019 | griinder
I also use these when available. The problem still persists for Bottom Paste/Parts layer. The non-symmetric(x axis) footprints in the Btm part layer, display correctly in the software, But then display incorrectly when imported into the Printer. The
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