Electronics Forum | Wed Jul 27 18:41:48 EDT 2005 | crishan
Aj, You are correct, we use pallets to hold the motherboard, an X-Y table then transports the pallet through preheat section to the solder bath. I will check out your recommendations on the solder alloy. Supplier is not willing to share PPM data o
Electronics Forum | Tue Aug 30 15:29:17 EDT 2005 | pr
I agree with cmiller on almost everything except the fluxer. I have not found that to be the slowest part of the process. On a slightly populated board, preheat will be the biggest cycle time killer. On very highly populated boards, time spent at the
Electronics Forum | Wed Oct 12 13:53:03 EDT 2005 | russ
What is nihon solder and which SAC alloy? Try using hot air to preheat the board to about 150C if you can, then try to remove the solder. Sucking pbfree from holes is very difficult since you have to achieve the alloys melting point throughout the
Electronics Forum | Fri Nov 11 04:35:06 EST 2005 | Rob
Hi Arnold, Some wave solder machines have a preheat function, that raises the board temperature before soldering. Some transformers use single use thermal fuses/TCO's inside, that trip at a set value (in a range approx. 70 degrees C to 180 degrees
Electronics Forum | Sun Jan 01 22:48:46 EST 2006 | Joseph
We are using selective soldering pallet, which the soldering flux is Interflux 2005M. We encountered the poor hole fill mainly at the heat sink components. Initially we tried to apply more heat but tend to overkill the flux activity. After some modif
Electronics Forum | Tue May 16 04:30:52 EDT 2006 | Rob
Take some of your boards along & run them. Try the same with the other alloys and see which suits your products best (make sure you make a note of the fluxes being used, and if the machines have similar preheats, nitrogen etc than yours).
Electronics Forum | Tue Jul 18 04:05:58 EDT 2006 | EC
Hi, For the past few weeks, we been seeing solder hole after reflow and this product been running for almost a year. We had try to shorter and longer the pre-heat time, reflow time and even reduce and increase the temperature....but could not help..
Electronics Forum | Thu Aug 03 09:05:09 EDT 2006 | Rob
We used to do point to point through hole soldering with robots. OK for medium to large volumes, but we did have to develop customer holders for each product. Quality was good - every joint was programmable for tinning, preheat, temperature etc, a
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
Electronics Forum | Mon Oct 30 09:43:31 EST 2006 | russ
Are your preheaters maxed out then? What is conveyor speed? anyway I would not have issue with that configuration at all. I have actually found that when using convection for some watersolubles you actually dry out flux and performance is worse.
