Electronics Forum | Thu Oct 25 16:20:18 EDT 2007 | chineechooze
I can provide you with a Dundas chart to tell you delta Tea.
Electronics Forum | Wed Oct 24 12:18:33 EDT 2007 | mpolak
I was asking about delta t in profiling, because I have just started to learn how to do it and wanted to know about it. So how can you reduce delta t, so you dont go from cold to hot too fats. Is it enough to slow donw conveyor speed??? Thanks M
Electronics Forum | Wed Oct 24 01:47:21 EDT 2007 | mpolak
hi everyone I'm new at forum. Could someone explain me what is delta t and why its so important. thanks marcin
Electronics Forum | Wed Oct 24 10:48:47 EDT 2007 | slthomas
Actually I didn't see anything saying this person was an engineer, but I digress.... In this case this person may very well be referring to the delta t across space rather than over time, as in different locations on a pcb that's being profiled.
Electronics Forum | Wed Oct 24 13:27:13 EDT 2007 | hussman
Ah, see Steve, I was right. It depends Marcin. If you use the same temps in each zone for all your product, vary you converyor speed. This will negate any waiting time between profiles. Slowing the speed will decrease your Delta-T to an acceptabl
Electronics Forum | Wed Oct 24 07:59:25 EDT 2007 | ck_the_flip
To expound on what Hussman says, Wikipedia defines Delta (a Greek letter that looks like a triangle) as, "A macroscopic change in the value of a variable in mathematics or science." Anyone who's taken Physics would know what this is. In soldering,
Electronics Forum | Wed Oct 24 21:17:13 EDT 2007 | hussman
Ramp rate is measured in degrees per second. Max and min temps are not required to to establish "ramp rate". The difference between parts, like I was describing is Delta T. But, ramp rate is a generation from this as well. Most component manufact
Electronics Forum | Wed Oct 24 07:35:52 EDT 2007 | hussman
It means "difference in temperature". It's important so you know when to put your sweater on or take it off.
Electronics Forum | Thu Oct 25 16:22:29 EDT 2007 | mpolak
OK if you could email it to me it would be great
Electronics Forum | Fri Oct 26 10:24:09 EDT 2007 | hussman
Oh, no daggers Steve, those are hugs where I come from.
