Electronics Forum | Sat Jul 13 11:14:55 EDT 2019 | SMTA-Richard
Yes, it is time and temperature, but it is also speed and distance. Even though you can run a longer machine faster, the boards have a longer distance to travel and you do too, so the cycle time per board may not improve be reduced as much as you th
Electronics Forum | Thu May 18 08:12:22 EDT 2006 | marc
smt You should have no issue using your exsisting oven for both leaded and lead free materials if the machine is capable of delivering the desired profiles. One aspect that makes a "lead free" oven is the design of the system. Ability to reach th
Electronics Forum | Wed Nov 29 20:32:08 EST 2000 | irwanm
I'm new in SMT and the company I'm working with has already purchased SMFL-3000 manual pick & place system with hot air and we don't have reflow oven. We are now starting design SMT board. My question is, how we reflow the solder? After all component
Electronics Forum | Wed Jan 14 08:28:15 EST 1998 | Allison
Contact your solder paste manufacturer and get the reflow profile recommended for that particular paste. Then, duplicate that reflow profile on your oven. You will need to use thermocouples. You may have to tweak this profile a little. | We use no
Electronics Forum | Wed Apr 06 15:28:04 EDT 2005 | patrickbruneel
Soldering PTH in reflow makes the process a lot more dependent on the physical forces in soldering (capillary force vs. gravity). Reducing the topheat in your oven will help the capillary forces (opening the hood solved the problem). Heat rises so if
Electronics Forum | Wed Apr 16 15:22:31 EDT 2008 | jdengler
This looks like it didn't solder the bottom side completely. The recipe for the reflow oven was not right and you did not hit a high enough temp at these locations to get a good solder joint. Then you saw the problem when you soldered the topside.
Electronics Forum | Wed Apr 16 19:11:40 EDT 2008 | lellis
[quote]Just a thought: if nothing else makes sense, you might want to watch the action of the edge-hold chains of the reflow oven, are they moving smoothly and uniformly around the drive gears and idlers?[/quote] As a PM provider and Man. Tech. for
Electronics Forum | Tue May 16 07:44:42 EDT 2006 | Chunks
Hi smtspecialist (man I gotta get me a name soon), NO! Your oven cannot contaminate your process. Unless you have flux residues dripping on your board, there is nothing to worry about. Now having your operators switch from leaded to lead-free smo
Electronics Forum | Tue May 16 13:36:10 EDT 2006 | Chunks
Good for you smtspecialist and your clean oven. It's always better to be too picky, cause once the goo starts dripping, they'll only blame it on your paste. Mistress? No, gotta keep gender out of the work place. How about "Connoisseur Chunks"? S
Electronics Forum | Tue May 23 12:23:19 EDT 2006 | stepheniii
I worked for a company that had an industrial nurse come in and talk to us about lead and saftey. Basically she told us in no uncertain terms that we had nothing in the facility that would come close to producing the temperature required to have lea
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