Electronics Forum | Tue Sep 15 10:19:23 EDT 1998 | dave c
| Dave, | How thick are your PCBs? Do you have adequate topside preheat or are the bottom preheaters turned up to ensure proper filleting on the top side? | Rob Rob, The average PCB is .062". There is no topside preheaters on our machine
Electronics Forum | Wed Jul 10 16:34:23 EDT 2013 | hegemon
Preheating is critical in Vapor Phase Soldering. One trick that is done is to use the "soft vapor" area just above the soldering vapor, some machines can pause just before going into the soldering vapor. Using that pause above the vapor to continue
Electronics Forum | Wed Feb 25 21:37:12 EST 2015 | dinhhuunam
Hi Bartel , 1.1 Profile Solution to Cold Soldering Cause for Cold soldering The peak temp of reflow is too low. The preheating temp is too high and it takes too long Solution Lower the preheating temp and increase the peak temp in the reflow zone
Electronics Forum | Mon Nov 26 20:41:24 EST 2001 | davef
Which ramp is this? * Ramp to preheat? * Preheat? * Ramp to spike?
Electronics Forum | Tue Jun 20 20:43:00 EDT 2000 | Dave F
Gary: Your flux supplier is the person for you to ask this question. For instance, the Lonco Superflo 26F that Jason was talking about last week has a preheat of 85�C to 110�C. * Thickness and number of layers of your board will affect you choice o
Electronics Forum | Wed Jan 11 16:56:15 EST 2006 | russ
So are you saying that you cannot reach 110C at 1 location without raising another location to excessive preheat temp? If so, sometimes slowing down the conveyor and dropping the preheat temps will help you get equal temps. I do not know this machi
Electronics Forum | Mon Jan 11 11:23:17 EST 1999 | Bill Copperthwaite
I have an Electrovert UPK 660c fitted with IR preheats top and bottom. We assemble a large range of multilayer backplanes and I was wondering if there are any advantages in changing to convection preheats.Has anybody got any views on the subject.
Electronics Forum | Mon Jun 22 21:42:02 EDT 1998 | Dave F
| We are discussing the importance of pre-hating components or the pcb in order to repair the board. I am interested in other peoples opinions | on pre-heating. Bill: Some folks we talking about preheating capacitors earlier this month in the threa
Electronics Forum | Mon Jun 22 21:42:02 EDT 1998 | Dave F
| We are discussing the importance of pre-hating components or the pcb in order to repair the board. I am interested in other peoples opinions | on pre-heating. Bill: Some folks we talking about preheating capacitors earlier this month in the threa
Electronics Forum | Tue Feb 14 10:25:04 EST 2017 | swag
Pre-heat, pre-heat, pre-heat! Swap out your acetylene with some propane. Problem solved. Throw a potato in your solder pot while your at it...
