Electronics Forum | Thu Feb 18 14:34:39 EST 2010 | jlawson
I have also seen on Heller ovens (even new ones EXL series) cross profile temperature differences over their spec of +/- 3 deg C, sometimes up to 7-10 deg C, 200-230mm from fixed rail. This can cause funny issues , profiling can cover this up and not
Electronics Forum | Thu Feb 18 15:25:13 EST 2010 | spitkis2
An air temperature tolerance of +/- 3 deg C along a 200mm width would not play a significant role on the board's temperature due to its thermal mass. However if the air temperature varies by 10C along the conveyers width, I can see how a 5 degree va
Electronics Forum | Wed Feb 24 19:51:12 EST 2010 | dcell_1t
Hi! Just to update... we checked along with solder paste suplier and found that the curtain on the oven was probably causing the issue so we removed in order to troubleshoot, as far as I know this curtain helps to not allow to flow oxygen into the ov
Electronics Forum | Tue Mar 09 20:50:40 EST 2010 | jkhiew
We have encountered high percentage of pin holes issue after lead-free reflow soldering from particular diode supplier that manufactured at Morocco. However, very little reject being found if the particular component is manufactured at China by using
Electronics Forum | Fri Mar 19 07:18:14 EDT 2010 | grahamcooper22
Hi, do you know if your LEDs are moisture sensitive ? And if so what MSL level ? Surprisingly it seems that not all are, but some seem really sensitive. I imagine the differences are down to the plastics used and the LED manufacturing processes. I a
Electronics Forum | Mon Apr 26 09:18:15 EDT 2010 | sudhir14
Hi, friends Need your urgent help on bellow issue ....... we are facing issue of misalign of one bulky SMT transformer during the placement itself rejection @40% & after reflow rejection @5 % using SMT m/c QP242 , placing this component at end of al
Electronics Forum | Mon May 24 12:05:53 EDT 2010 | deanm
Did you try Techspray Wondermask W? It is water soluble and can probably be transferred from the bottle to an EFD type syringe for dispensing (we use the P and the PL that way). As far as if it will swell through the reflow, I don't know. We don't us
Electronics Forum | Fri Jun 04 16:30:10 EDT 2010 | jdm2008
I am running a cemelot 5000 and I am having trouble with the solder clogging up the needle. When the solder is removed it almost appears if it has reflowed. I am using a 22 guage needle, and the problem occurs with both type 3 and type 5 solder pas
Electronics Forum | Tue Jun 08 19:13:03 EDT 2010 | vmorina
Hi Vee, I thank you very much for the reply,and yes everything is ROHS. I am reading over the manual and looking at the differences between them. I also have a questions for you regarding stencils for BGA and other types of packages. Do you know any
Electronics Forum | Wed Jun 09 11:41:25 EDT 2010 | smtmax
Hi Danny, I would suggest a laser-cut stencils w/ anti static polymer film. For more information on the stencil you should consider engineering lab. They provide high quality stencil for a reasonable price. If you can find a laser-cut stencil for a
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