Electronics Forum | Fri Apr 21 23:37:31 EDT 2006 | SD
My company is very insistant on making our actual production times match the predicted. Perfectly reasonable.... However, the problem is that one operator can beat the predicted rate and another can blow it away 10-fold. I know the problem is tha
Electronics Forum | Mon Apr 24 04:23:56 EDT 2006 | TA
Hello guys, I am Looking for a oven with the following specifications. Can any one suggest me the best suitable model. Thanks ========================================================== - heating length 2500mm - zone top/bottom 7 - forced convection
Electronics Forum | Tue Apr 25 09:43:35 EDT 2006 | TMC
I am in the process of profiling some 8"x10"x0.063" double sided boards in our 4 zone oven(4 top and 4 bottom heaters). Was wondering if I can create a profile so that the components on bottom side of a board do not reflow while the componets on top
Electronics Forum | Tue Apr 25 10:13:17 EDT 2006 | slthomas
What kind of parts are on the bottom? Small passives are very unlikely (won't unless other abnormal factors come into play) to fall off when reflowed a second time regardless of temperature differential. There is a simple weight/soldered surface ar
Electronics Forum | Tue Apr 25 10:42:38 EDT 2006 | TMC
Almost all of the components on the bottom side are passives however, there are a couple of mBGA's and qfp's. I am aware that even if the components on the bottom do get reflowed, surface tension of solder will hold them in place. As far as IC's, w
Electronics Forum | Tue Apr 25 21:29:08 EDT 2006 | TMC
Thanks for all the replies. Rob . . . that's what I was looking to get feedback on; to see if others can program their reflow ovens so that double sided boards only reflow on top during the second pass. Our oven does have an edge belt conveyer so t
Electronics Forum | Tue Apr 25 22:16:31 EDT 2006 | KEN
I agree with Russ. The problem is your thermal isolation is so small 1/16 inch. Also, most ovens measure temperaure in the plenum. You don't solder in the plenum. Therefore, you have a intermidiate "zone" temp. mixing between the top and bottom
Electronics Forum | Wed May 10 00:42:10 EDT 2006 | Chris
I agree with all of you. If it is a good forced convection oven, the bottom side of the PCB will get very close to reflow temp and will probably reach reflow temp. Plus your oven may fight your settings. The lower heater temp settings will never b
Electronics Forum | Wed Apr 26 10:56:13 EDT 2006 | JEM
Mydata sales for TPSys 2.4 says and i quote" Reduce your setup and changeover times with new features like the ability to use auto teach for vision illumination, barcode loading of trays, factory wide sharing of vision package data.TPSys 2.4 contains
Electronics Forum | Wed Apr 26 07:37:34 EDT 2006 | amol_kane
"Can we reuse the same machine? My point here is that the non lead free process has already coated the machine interior ( exhaust, internal flow ) with leaded component, and by conversion to lead free are we containminating the lead free product from
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