Electronics Forum | Tue Jun 20 17:56:39 EDT 2000 | Gary Kemp
Can anyone give me a ballpark figure on where to set the temperature for the pre-heaters of a wave solder? Any responses are greatly appreciated.
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 | Thu Jun 22 11:09:11 EDT 2000 | C.K.
TYPE of Preheater makes a HUGE difference, as well. Infrared (IR) and convection, 2 of the most common types of preheaters, have very different heat transfer characteristics..... Convection heats your board more uniformly, so you'll see very small
Electronics Forum | Mon Jun 26 14:36:44 EDT 2000 | Tekguy2000
Then if you have R-Paks on the solder-side start all over again!!
Electronics Forum | Sun Jun 25 22:58:49 EDT 2000 | gary
thanks for the feedback....but what's your delta T and how will you know that you are within the delta T range ?...I think this is the main point of the above topic...can you elaborate more on how did your company get Delta T ? thanks and regards,
Electronics Forum | Mon Jun 26 12:53:41 EDT 2000 | Michael Parker
I belive I once saw a picture of a Delta-T. It was in a very old Popular Science magazine. Some yahoo from Ohio wanted to put wings on his ol' tin lizzy. He also had some elaborate plans to convert his flat head V-8 to run off corn likker. I say chuc
Electronics Forum | Wed Jun 21 20:29:34 EDT 2000 | Dave F
Wolfgang: You're correct, I've obviously goofed this up, somehow!!! (sound of scurrying in yellowed soldering notes) Let me try and find the source for this to redeem myself.
Electronics Forum | Tue Jun 20 22:52:46 EDT 2000 | gary
How to calculate the delta T ? What's the allowable range for delta T value? we r not calculating this in our process, instead we r maintaining the pre-heat temp which we measure from topside of the bd. Thanks in advance
Electronics Forum | Wed Jun 21 03:58:46 EDT 2000 | Wolfgang Busko
Hi Dave, how does that calculate when you consider a topside temperature of for example 120�C like mentioned for NC-flux a while ago and a pot temperature of 250�C ? Just wondering Wolfgang
Electronics Forum | Wed Jun 21 23:47:28 EDT 2000 | gary
my topside preheat is 97 deg. C and my peak temp. is 230 deg. C with a duration of 4 secs. What would be my Delta ? I suppose 230 minus 97 is equal to 133 deg C...is that right? regards
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