Electronics Forum | Fri Mar 22 04:20:29 EDT 2013 | jlawson
Also Rehm Thermal Systems Ovens would be worth a look... They are well made, ALL stainless tunnel , 3 phase blowers, highly realiable, and they have new entry level series called VXC Series starting at 6 zones+, but based on same tech and build as t
Electronics Forum | Thu Apr 15 17:06:08 EDT 2004 | russ
What are your temps at the locations that you are having trouble with. We cannot tell anything by the zone settings of an oven. We need max temp, how long above liquidous etc.. a lot of times this symptom is due to too long of a soak at too high o
Electronics Forum | Mon Apr 15 06:30:23 EDT 2019 | spoiltforchoice
Its not the max temperature that is the issue, its how much energy the oven is capable of transferring to the PCB inside the 4-6 minute window of a typical profile. In a conveyor oven this is achieved by having zones of different temperatures, but th
Electronics Forum | Sat Apr 17 17:08:22 EDT 2004 | finepitch
Russ has a hint by saying "too long of a soak at too high of a temp or being in reflow for too long/hot". I think the board should stay in the oven for 3-4 minutes, spending 60-90 seconds of which during reflow. in order to stay in the oven for 3 m
Electronics Forum | Wed Jun 13 15:56:35 EDT 2007 | ck_the_flip
I experienced this with a high-mass capacitor. I was able to turn down the bottom-side convection (around 50�C lower than each of the top-side heaters), and able to NOT lose any parts. I got the bottom-side part just slightly over liquidus, and min
Electronics Forum | Tue Jan 13 13:17:00 EST 1998 | Matt Brown
| We use no clean paste and sometimes experience | flux splattering which gives spot on gold fingers. | Need help in analize the cause. thx. Most often, the 'splattering' is caused by an excessive temperature in the oven: this can cause the solder p
Electronics Forum | Tue Jun 10 09:46:28 EDT 2008 | dyoungquist
We run a high mix/low-medium volume smt line with MPM SPM stencil printer, MyData pick-n-place machine and a Heller reflow oven. That combination is working well for us.
Electronics Forum | Wed Mar 16 20:12:12 EST 2005 | bkd
Does anyone knows any vendors that supplies jedec precondition tray that could stand up to 270�C peak reflow temperature.
Electronics Forum | Wed Dec 13 19:40:38 EST 2000 | Jerry Wetzel, SME, EM/SME
Your profile must be precise, your stencil aperture sizes and shapes are very important, and the size of the pads on the boards should be very close to what the part manufacturer recommends. We had some trouble with hi-temp paste, and discovered tha
Electronics Forum | Tue Dec 12 03:15:13 EST 2000 | Chris May
The profile that you should be using, hopefully, is detailed in the paste data sheet. Connect your thermocouples to various parts of the board, depending on layout, population etc; and then run some trials observing the profile on your oven monitor/
