Electronics Forum | Thu Jun 29 12:07:09 EDT 2017 | georgetruitt
HOW THICK IS THE BOARD? IS THERE A LOT OF COPPER IN THE BOARD? DOES YOUR CUSTOMERS PROVIDE HEAT RELIEF IN THE BOARDS BARREL DESIGN THERE NEEDS TO BE PLENTY OF ROOM FOR LEADFREE SOLDER TO FLOW, DID YOU CHECK YOUR PIN(LEAD)TO HOLE (BARREL) RATIO? N
Electronics Forum | Wed Mar 28 11:42:33 EDT 2018 | dleeper
I never thought I'd utter these words but, Have you considered Quad? Quad went out of business around 2001 but the line was picked up by Tyco Automation and then by a company called Precision Placement Machines (PPM). A Quad 4C with feeders should
Electronics Forum | Mon Dec 03 15:03:49 EST 2018 | dleeper
I can't open your spread sheet to see how you calculate this, but usually this sort of calculation assumes the leads are spaced symmetrically on both sides of the part and the center of mass is between them. Gravity pulls the part down, while the wet
Electronics Forum | Fri Feb 01 02:31:24 EST 2019 | sarason
You can buy an awful lot of PCB's with that budget. Having done multilayer at home for RF I would not recommend it. It took us 7 years to get a workable but I would not say reliable process running. 4 layer boards, plated through, green and silk scr
Electronics Forum | Mon Mar 23 15:08:21 EDT 2020 | slthomas
Unfortunately I didn't do the work...I just requested it from maintenance. I think the E5's were really a completely different beast than an E4, but I've never used an E4 so really don't have any experience. I purchased 3 E5's when new for a previou
Electronics Forum | Thu Dec 05 05:39:05 EST 2019 | oxygensmd
I know your application isn't BGA but the data sheet also mention about the peak temperature - 235 Celsius. For the LEDs you can reach higher temperature and I recommend to reach 225-235 Celsius. You will get significantly better results because the
Electronics Forum | Mon Dec 30 12:55:37 EST 2019 | emeto
We saw your profile, which in my opinion looks alright based on the guideline from the vendor. Can you tell us more about the joints that you cleaned? Are they showing nice wetting and nice and shiny finish? How about your stencil thickness? From my
Electronics Forum | Wed Feb 12 14:38:18 EST 2020 | SMTA-Alex
There are several areas you can check. Your profile is very fast. You reach the peak at around 3 minute mark. That's not enough time for the fillet to form. Try to slow down your belt speed to around 90-95, to give it more time. Also, your temperatur
Electronics Forum | Mon Jun 15 16:31:25 EDT 2020 | rgduval
You may find some wetting issues running LF HASL with 63/37, as your reflow temperatures will be significantly below the LF reflow. On fiducials...if you don't have a quote for your boards with ENIG, I would recommend at least checking it out. It's
Electronics Forum | Tue Feb 09 16:53:06 EST 2021 | SMTA-64387083
The size of the pad changes among the two. A solder mask defined pad will always be larger than a copper defined by your mask expansion setting. This will affect paste volume, if your standard paste aperture is designed for copper defined pads you m
