Electronics Forum | Fri Jun 04 17:41:17 EDT 2004 | ricardof
Hi to all, I have one question that I hope to receive comments - Does anyone know or have any experience for the maximum boards you can run on a SMT line, this is quite general, but let's consider a board 8" x 8", about 400 components. Regardless of
Electronics Forum | Thu Jun 10 14:55:43 EDT 2004 | russ
It really depends on how you depanel these, If you are using a machine you can probably get away with the 1mm, If not, the 5mm is there to help reduce the cahnce of fracturing the component. Some interesting notes about having a defined keepout is
Electronics Forum | Mon Jun 14 10:18:07 EDT 2004 | Dreamsniper
Hi Guys, I work in Process Engineering and due to some organizational changes I've been assigned to generate BOM's for our manufacturing (we are an OEM). This is something very new to me and I have no experience with this kinda documentation and wou
Electronics Forum | Wed Jun 16 18:01:45 EDT 2004 | Rodion Pronin
The result you will be receiving is an ASCII text. It is up to an operator to use the information. What we need as input are: number of feeder attachments on the front and rear line, we need x,y coordinates of the pcb placed on the machine and x,y co
Electronics Forum | Mon Jun 28 22:44:13 EDT 2004 | davef
Q1: What is the most popular PCB finish for lead-free soldering ? A1: We'd guess ENIG Q2: Who drives the selection of the finish, assembler or designer ? A2: A tight circle of recrimination, blame letting, and other human ills that is primarily driv
Electronics Forum | Wed Jun 23 13:34:29 EDT 2004 | df_indy
I am four weeks into my new job, there always seems to be some issues here with PCB every week. Today while I was checking some assemblies with micro-scope, I found a lot of tiny bubbles/blisters on the board. They are just little dots if you look
Electronics Forum | Sat Jul 03 10:03:22 EDT 2004 | Bryan Sherh
Things to consider are: * Thermal expansion > characteristics of you flex and your pallet > should be better matched. We use G-10. * > Placement of your two sided tape should be > better, more uniformly distributed. We run strips > the length o
Electronics Forum | Sat Jul 03 00:58:57 EDT 2004 | KEN
so what did we do before X-ray? sound process shouldn't need to rely on inspection. Extended soaks can be used to burn off high temp volatiles but I have never heard of 5 minutes! I have used 90-120 sec. to reduce solder splatter....but haven't do
Electronics Forum | Fri Jul 16 09:03:40 EDT 2004 | russ
A couple of thoughts, 1. buy larger quantity reels and load more trays of the same P/N if your problem is replenishing the machine. 2. If you're talking about changeover I would suggest that the feeders be set up in the kitting process and deliverd
Electronics Forum | Wed Jul 28 18:51:52 EDT 2004 | gregoryyork
Found problem many years ago by chemical extraction and IR analysis, produces alarming amounts of plasticizer from under cured or incorrect mix of hardener to liquid photoimageable solder resist. Problems this causes are endless and many things blame
