Electronics Forum: setup (Page 88 of 148)

tombstoning after wave?

Electronics Forum | Fri Dec 08 11:08:03 EST 2000 | Antonio

Ok fellas, tell me how you'd fix this! I'm having melf connectors that are tombstoning in the wave, NOT the reflow, the wave. I've never seen this before. All other parameters are the same...solder, preheats, placements, the board, building humidi

Re: Process Characterisation

Electronics Forum | Sat Dec 02 21:21:11 EST 2000 | Murad Kurwa

Our NPI division is in a same category. We assemble small quantities and lot of different set-ups. I created a DPMO charting method using Excel that we use at Post Reflow, Post Wave and Final QC. In addition, we use x-r charts at screen print for con

Downtime on SMT lines

Electronics Forum | Thu Nov 16 03:41:43 EST 2000 | Willem Combrinck

Hi everyone. I'm an industrial engineering student working at a manufacturing company in Cape Town, SA. Recently my boss wanted to know the causes of our downtime in SMT. Things like setups, unscheduled maintenance, debugs etc came up while I was doi

Re: White residue on PCB's

Electronics Forum | Wed Oct 11 10:29:28 EDT 2000 | G. English

Try the following steps : FIRST CHECK THE ARCHIVE for further information, it WILL help you. Step One : What�s the chemical analysis of this white res? Obtain a sample. It could be tin, rosin, or something else??? Step Two : The fastest way I know

A Note from KIC Thermal

Electronics Forum | Mon Aug 21 18:13:19 EDT 2000 | Greg Jones

In Steve's last posting he wrote (in part): "I've decided that if KIC can recommend that profiling be done on unpopulated boards (how valuble is THAT??)" I contacted Steve off forum to discuss this. In the paper referenced by John Thorup (above),

Re: Barcoding Component Reels

Electronics Forum | Thu Aug 17 08:09:52 EDT 2000 | LarryK

We had an interesting problem this week that is along this thread. Had a project that had the same resistance value components, but one component was a 1% tolerance and the other was a 1/2%. Guess what? the operator got them mixed up. We have a first

Re: Hot Air Knife

Electronics Forum | Mon Mar 13 14:41:22 EST 2000 | Boca

By Hot Air Knife I assume (leave it alone Dave F.) that you mean a debridging knife located at the exit end of a wave solder machine. Russ is right, they are not a good substitute for a good process, but once the process (w/o HAK) is developed, it

Re: Hot Air Knife

Electronics Forum | Mon Mar 13 14:45:01 EST 2000 | Boca

By Hot Air Knife I assume (leave it alone Dave F.) that you mean a debridging knife located at the exit end of a wave solder machine. Russ is right, they are not a good substitute for a good process, but once the process (w/o HAK) is developed, it

Stencil printers, what's really out there?

Electronics Forum | Tue Feb 22 13:58:15 EST 2000 | Steve Thomas

I'm looking at stencil printers, particularly those that can produce good repeatable prints on finepitch boards with minimal setup and training. I would love to find a printer that does auto x-y-theta alignment (would like a system that aligns sten

Effective Alternatives To Stencil Cleaning

Electronics Forum | Tue Feb 20 15:03:18 EST 2001 | davef

I have a knack for asking those "set-up" questions of sales types during their presentations. It's so bad, I don't even have to pay for lunch to attend SMTA meetings. The "presenter" pays for Dave. YES!!! I've read the Richard S. Clouthier "SMT S


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