Electronics Forum | Sat Apr 12 09:47:07 EDT 2003 | davef
... continuing with Q2: How do you remove and replace? A2: Belt sander, sand blasting, grinding wheel, etc. Parylene/Paraxylyene is a great coating and can be selectively removed by several methods. The IPC-7711 (Rework of Electronic Assemblies)
Electronics Forum | Tue Mar 08 09:56:05 EST 2005 | caldon
Tim- You have two separate issues 1) Stencils and 2) wave. Stencils you can purchase a ultrasonic system that will remove the paste automatically or you can use stencil wipes to remove it manually. I would refrain from using towels and IPA as it dilu
Electronics Forum | Wed Mar 09 08:23:31 EST 2005 | davef
We don't have experience on this, but first we'd talk to a technical type at our solder paste supplier. Baring that, we'd: * Soak a paper towel in a 'solvent' [ie Kyzen XJN, EnviroSense Enviro Gold, Petroferm Hydrex, etc]. * Place the towel in conta
Electronics Forum | Fri Jun 03 04:16:27 EDT 2005 | Bryan She
Background: We use a thermal boards to setup/profiling the reflow oven for pilot run.and then daily verify the reflow profile with this thermal board.Now we phased into LF production,and the LF thermal board can only withstand 25~30 times reflow excu
Electronics Forum | Fri Jun 03 16:35:40 EDT 2005 | davef
We've never tried to remove Paraylene from a BGA, but we stayed [in seperate rooms] at the Red Roof Inn. Parylene/Paraxylyene is a great coating and can be selectively removed by several methods. IPC-7711 (Rework of Electronic Assemblies) has a sect
Electronics Forum | Thu Jun 30 18:40:06 EDT 2005 | KEN
What your asking has many variables. 1. Material: SS vs. Cast Iron. Iron is thicker. Which SS? 316, 316L 2. Pump speeds, turbulence, hours of operation directly affect equipment life. 3. Things like scraping the pots, the tunnels, impelle
Electronics Forum | Wed Nov 28 16:08:38 EST 2007 | jmelson
I've been using Xilinx TQFP's in the 44 and 144 lead sizes with no trouble. I don't even bake them before reflow and have never had any problem. The Xilinx parts are certainly NOT sensitive, I could not break one with my bare hands if I tried (I ha
Electronics Forum | Fri Aug 07 09:53:12 EDT 2009 | kpm135
The Z-axis Drive card on our MPM UP2000 HiE fried. We replaced it with a new card, setting all the jumpers to match the old card. After that we had to recalibrate the Z-axis and the snugger height but the problem is that the camera is now too close t
Electronics Forum | Thu Dec 10 05:58:59 EST 2009 | gregoryyork
Best to use Tin treated with TinP Additive. This ensures the Tin is fluid enough to Dissolve any Leaded residues. Run the machine for one hour at 275C then take out wave former and as much of the workings of the pot as possible. Then start bailing ou
Electronics Forum | Thu Mar 25 07:59:57 EDT 2010 | fredc
Hello Rodrigo, My expierence is with metal cutting machine tools not Fuji placement machines. That said there are a several of areas to look at. #1.Interference on your C axis travel, look for scrape marks or something dragging on the drum. #2. Tigh
