Electronics Forum: hours of operation (Page 1 of 55)

Spray fluxing VOC free, as operation HOURS before wave solder

Electronics Forum | Thu Sep 21 10:52:43 EDT 2006 | russ

Could you not just switch to alcohol based flux? If your prob is getting the water off the board prior to hitting the wave, maybe you could install some type of convection to aid in this? Russ

Spray fluxing VOC free, as operation HOURS before wave solder

Electronics Forum | Fri Sep 22 04:48:14 EDT 2006 | greg york

Apply the bare minumum amount of VOC free typically 50% less than alcohol fluxes. By doing this you can keep the same top board temperature as alcohol, its only when people over flux do you need to boost up the preheater to volatise of the water. NEV

Spray fluxing VOC free, as operation HOURS before wave solder

Electronics Forum | Wed Sep 20 16:27:06 EDT 2006 | proy

As we are a low volume shop, the extra handling is not too much of a concern. My biggest concern is if the flux sitting on teh board for a long time (few hours) is going to cause any problems in solderability. My thought is that it should not as it

Spray fluxing VOC free, as operation HOURS before wave solder

Electronics Forum | Wed Sep 20 12:14:08 EDT 2006 | Rob

Good question - as it is a water based flux then you are going to get a very low level of solvent evaporation, and it's hardly going to be absorbing additional water whilst sitting around. (you actually want the water (carrier element) to evaporate).

Spray fluxing VOC free, as operation HOURS before wave solder

Electronics Forum | Wed Sep 20 10:36:27 EDT 2006 | proy

I am considering moving my spray fluxer into a completely separate operation. Has anybody any comments of sraying VOC free flux on boards, then putting them in a drier/holding rack for possibly say overnight, then running them through wave solder?

type of machine

Electronics Forum | Thu Mar 09 00:45:57 EST 2006 | kent_peterson

Fastek will get it done with 2 machine and 2 shifts. 2 shifts would need to place 50,000cph. One CP643 with both device tables set could get it done. Having it panelized in 50's, you would need to print 50 panels a hour so get a auto cleaner on the p

Necessity of ROSE in commercial quality processes

Electronics Forum | Mon Feb 27 17:08:15 EST 2006 | GS

3,5 ugr/cm2 NaCl) or power components, or Raw PCB. Nothing with the solder process or fluxes. Ion Chromatography analysis was necessary to help understanding of contamination origin. When occasionally we run TIC on a NC assembled PBA (Paste ROL0 or

Re: Handling of moisture sensitive IC's

Electronics Forum | Mon Dec 28 14:57:07 EST 1998 | Earl Moon

Looking for additional handling and baking information of moisture sensitive IC'c beyond/or inadditotn to IPC - SM - 786 A. Publications, guidelines, baking experience. Much depends on your environmental controls and those of your suppliers. PB

Re: Semi-Automatic Stencil Printing of Fine Pitch

Electronics Forum | Fri Jul 16 06:22:31 EDT 1999 | Wayne Sanita

Mark, I had the same peoblem. For my stencils i use a 15% reduction for the width of fine pitch leads only, as Earl said follow the 1:1.5 standard. We consider pitches of 32mil and under. We also clean the stencil every other board to ensure no caki

Re: Quick Purge of Reflow Oven for N2 Operation

Electronics Forum | Mon Dec 28 15:03:14 EST 1998 | Earl Moon

We have a Vitronics SMR400N oven and many times need to use N2 inerting. My problem is that it takes close to an hour of operation to purge the system to achieve the desired O2 levels (~40PPM). This is not only time consuming but results in an inor

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