Electronics Forum | Wed Mar 22 17:28:13 EST 2000 | Steve Harshbarger
Donnie, It's funny you ask this question. I just last month was at a company doing exactly what you are asking (Alpha 310 flux with infrared heating). They were successful, but they had 2 important things going for them. 1) A spray fluxer that wa
Electronics Forum | Fri Mar 17 16:39:33 EST 2000 | Larry
We have just installed an omega wave to our W/S machine and are tring to W/S some of our bottom side surface mount components. I am still getting skips on some sot 23's. The component lay out meets all IPC 782 guidelines. I have verified these setti
Electronics Forum | Tue Feb 29 13:18:16 EST 2000 | Steve Schrader
We have what appears to be a recurring problem. On immersion gold boards only, we are having solderability problems. After reflow, selected parts can be popped right off the board. There is then a dark haze left on the pad. The paste on the compon
Electronics Forum | Tue Feb 29 22:53:13 EST 2000 | KH
I have used both the QX2 and BGA3500 hot air rework system from Metcal; both are great systems; the QX2 is a very simple system for leaded devices, easily trained and very inexpensive compared to SRT, Air Vac, and Conceptronics. The BGA3500 works on
Electronics Forum | Wed Jan 31 01:41:00 EST 2001 | pjc
Steve, I have no influence over conn design. We paste print-reflow solder two types of connectors. One is a 50 pin IDC w/ 0.5mm lead dia @ 2.54mm lead pitch and a chamfered pointed lead tip. The other is 32 pin DIP w/ 0.36mm lead dia @ 2.54mm pitch
Electronics Forum | Tue Jan 30 21:13:26 EST 2001 | davef
Two options: 1 Glue 2 Use a dedicated work holder with 'pockets' milled out to accommodate the components on the first side of the board after reflow. Some prefer a pallet that runs all the way through their process. So, these pallets: * Feature
Electronics Forum | Wed Feb 21 14:40:44 EST 2001 | billschreiber
Hello Mark, As with any cleaning process, there are a number of variables that will affect the cleaning of adhesives with a Smart Sonic Stencil Cleaner: brand of adhesive, concentration of cleaning chemistry, temperature of wash solution, etc. Both
Electronics Forum | Thu Mar 08 12:40:54 EST 2001 | Ralph Merk
We are currently using 0402 resistors and capacitors in our production process. Our equipment is as follows: - DEK 265 - Siemens S25/F5 - Vitronics XPM520(5 zones) - 2% silver solder Alpha WS678 The problem is that randomly some 0402 capacitors are
Electronics Forum | Fri Oct 19 00:37:43 EDT 2001 | ianchan
Hi, my guys did such solder paste deposits on PCB bareboards before, (before my physical join with my current company), approximately 2-3 years ago, for a small Lot run. What the PCB supplier did was to apply "block" shaped Sn/Pb paste alloy onto t
Electronics Forum | Mon May 21 20:55:19 EDT 2001 | dougk
We have both CP 4/2's and 4/3. We're also running Siemens S20's & F4's. The 4/3's vision is more temperamental and slightly harder to program. Machine startup and nozzle centering takes longer, but placement time is slightly better. Honestly, for wha
