Electronics Forum | Wed Sep 17 07:39:13 EDT 2003 | davef
As we recall, they attached something like a placement vib head to the rails. The problem, as you stated, was isolating the board from the vibrating rails during cooling of the solder connection.
Electronics Forum | Wed Sep 17 15:34:17 EDT 2003 | Stephen
How about a sonic vibrator of some sort? Can't see it working in real life but who knows what someone with too much time on their hands might come up with. Stephen
Electronics Forum | Thu Sep 18 07:38:50 EDT 2003 | cmiller
That was the method we were going to try. We have the circuitry from a sifter we make. The sifter works with a regular speaker but I could not find one working at a high enough temp for an oven. Then I lost interest or got busy.
Electronics Forum | Mon Sep 22 13:18:59 EDT 2003 | pjc
I remember reading something about that a while back. The paper said vibration created a higher percentage of voids in solder joints.
Electronics Forum | Mon Apr 11 07:46:51 EDT 2005 | mmjm_1099
Make sure you find out that short to longer ovens are both Lead-Free capable. If you want respond here on what they say for future reference for people.
Electronics Forum | Sat Apr 05 21:51:42 EDT 2014 | garym4569
The 237*C is under the inductor with aTAL of 48s. I worked on the profiles this morning an got the max temp up a few degrees and the TAL to 62s. I will check the body temp of the Elec caps. The rest of the board has a max temp of 247. Thanks Gm
Electronics Forum | Mon Apr 07 15:14:41 EDT 2014 | garym4569
I drilled a small hole from the other side in order to get my thermocouple under the inductor pad. I did not have anything on hand to fill the hole, so I covered with kapton tape the best I could. I suspect that is why it looks like it should work.
Electronics Forum | Mon Apr 07 15:22:17 EDT 2014 | garym4569
Found the issue. The footprint is incorrect. The inductor completely shields the paste from heat. Slid the inductor on the pad to expose the pad and paste, and perfect solder joint. This part was a last minute design change with a larger body.
Electronics Forum | Tue Apr 08 08:04:57 EDT 2014 | cyber_wolf
Ahhh...now this makes sense. Glad you found the issue. Gary, try using aluminum tape to secure thermocouples. It works much better than kapton in my opinion. KIC sells it, but I'm sure it can be found elsewhere.
Electronics Forum | Tue Feb 19 08:57:43 EST 2019 | prasanth
hello experts if you had anyone rts and rss profiles HELLER 1707 MK III series 7 zone machine pls forward me prasanth
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