Electronics Forum | Tue Nov 27 11:06:45 EST 2001 | scottdavies
Sounds like they may be hitting some kind of submerged obstruction in the wave, maybe? Is it only MELFs that are affected, or any other similar sized components, such as Tantalum caps?
Electronics Forum | Tue Nov 27 11:06:53 EST 2001 | scottdavies
Sounds like they may be hitting some kind of submerged obstruction in the wave, maybe? Is it only MELFs that are affected, or any other similar sized components, such as Tantalum caps?
Electronics Forum | Tue Nov 27 16:58:29 EST 2001 | davef
We wave solder no MELF. When we analyzed this a couple of years ago, the temperature extremes of the wave affected LT reliability.
Electronics Forum | Thu Aug 22 02:18:09 EDT 2002 | mjabure
Specify the nozzle size as 1.4 in both the nozzle allocation table and the PD, the nozzles will still pass center test as the size variation is still within tolerence.
Electronics Forum | Thu Aug 22 23:18:03 EDT 2002 | mjabure
you're welcome. if you have any other questions you can e-mail me, my address here is mjabure@smtnet.com. Used to be a machine instructor for fuji.
Electronics Forum | Wed Feb 26 14:37:57 EST 2003 | russ
Never used U shapes for 0603 but have used them for MELF pkg. Never had a problem printing as long as area ratio is acceptable. So just out of curiosity, why U shape for 0603? Russ
Electronics Forum | Thu May 01 20:40:15 EDT 2003 | davef
Are you talking to these guys? http://www.smtnet.com/Forums/Index.cfm?CFApp=1&Message_ID=24298
Electronics Forum | Tue May 06 15:53:52 EDT 2003 | bremerg
The coating is pliable and is air cured for 24 hours. The potting compound goes into the top assemnbly in 3 diferent stages. The circuit boards are coated using urethane type conformal coating. The unit is also placed into an ESS chamber -40� to +
Electronics Forum | Wed Jun 14 09:36:55 EDT 2006 | AR
Thanks Pavel, Have tried all that, including some exorbitantly expensive MELF nozzles but it does seem that the good old weight method still works best.
Electronics Forum | Sat Jul 08 10:44:49 EDT 2006 | larryw
Are you using the old type FV or the new CL Feeders? We place melfs all day long and never ran into a problem with feeder advancement. Sometime the manufactures of the components apply to much glue to the tape which can cause problems with feeder adv
