Electronics Forum | Fri Apr 18 11:52:25 EDT 2008 | leemeyer
I am looking for some sources for a reuseable thermocouple probe. We do small prototype runs and many times cannot afford to be scrapping boards for profiling. I am looking for a probe that will clamp to a pcb or pcb carrier and allow me to manipulat
Electronics Forum | Fri Apr 30 08:28:39 EDT 2004 | davef
Roger Saunders, President Saunders Technology, Inc wrote a fairly unbiased paper that compared different thermocouple attach methods. You can probably find it on their site. In it, about gluing thermocouples, he says: There are two general classes
Electronics Forum | Thu Dec 21 10:27:24 EST 2006 | realchunks
>>> Now you must take into account your total board mass as well. If you have tons of heat sinks, or parts on the other side that can affect your profile, you should have them on the board when profiling. That�s where the "engineering" part in all
Electronics Forum | Thu Dec 21 21:37:19 EST 2006 | Jack
Hi Pavel, Real Chunks, Thanks for your valuable inputs..Selecting the correct location for board profiling is critical in determining the solder joint quality. Am I right to say TC wire attachment locations priority should be as below: (1) Thermal
Electronics Forum | Wed Jan 10 17:11:53 EST 2007 | mscalzo3
I always try to profile using a fully populated board and soldering the thermocouples. This is the only true way of getting an actual temperature of the joints. But, with that being said, its not always feasible to use this. There have been a coup
Electronics Forum | Thu Dec 21 02:27:57 EST 2006 | pavel_murtishev
Good morning, (1) This depends on component type. In general it would be better to have fully populated board. Or at least you should mount components with different thermal mass. You should place TC�s at three points at least: component with high t
Electronics Forum | Tue Jun 01 07:26:55 EDT 2004 | johnwnz
Alistair, your paste deposit is controlled by a few things: Stencil thickness Squeegee pressure Squeegee speed Print gap in 99 out of 100 applications for paste printing you would have a print gap of 0 i.e. on contact printing where the PCB is in fu
Electronics Forum | Mon Jun 10 13:37:03 EDT 2019 | slthomas
How wide is this board? I ask because if it's not terribly wide, you might just be better off attacking the problem with the profile rather than attacking the board conveyor design.
Electronics Forum | Mon Jun 10 13:47:23 EDT 2019 | don_julio
First thing we did was visit the profile and we have it adjusted as far as we're willing to take it. I'm just going to make a carrier design in cad and have the board house produce some in their thickest substrate to see how it works out. Thanks.
Electronics Forum | Thu Jun 13 12:44:39 EDT 2019 | dwl
A couple of caveats; The FR4 will degrade with successive reflows and will eventually need to be replaced. Not a big deal for low volume, but something to be aware of. The bigger concern is that a sheet of .125" large enough to position your assembl
