Electronics Forum: setup (Page 88 of 149)

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

Re: Screen printer, MPM or DEK

Electronics Forum | Mon Feb 14 15:14:54 EST 2000 | dean

Dek 248 / 249 (mfg'95) MPM 2000 Realignment? Are you having to insert print offsets (X.Y, theta)? If yes, your vision cubes are out of alignment. This typically happens if a "crash" occures. A "C" tool can correct this. Or are we talking abou

Re: SMT Programming - Parts Database set-up for contract manufacturer

Electronics Forum | Thu Feb 10 07:13:06 EST 2000 | JAX

Doug, If you are looking to reduce the size of your database you have many options. You can use the Jedec outline or Jedec name to standardize your component library. Otherwise you can set one up specific to the dimensional info you measure. If you

Re: SMT Programming - Parts Database set-up for contract manufacturer

Electronics Forum | Sat Feb 12 15:54:11 EST 2000 | Francois Racine

> customer number and package number =>> EX:1206T.5 The part number is used for two reason. (1) Your operator know exactly what component is in this feeder and the value of that component. (2) On my two PNP machines, I can use an IPC module which

Re: silver finishes on pcbs - what about the wave?

Electronics Forum | Fri Dec 15 08:00:57 EST 2000 | Pete B

John, We regularly wave solder electroless silver finished boards (Alpha Level)with mixed SMD and through hole parts and do not have any problems. We have changed a number on PCB's from HASL to electroless silver, mainly for the benefits at SMD whe

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

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