Electronics Forum | Thu Jan 21 20:58:19 EST 1999 | Todd Gilmore
Ken; my experience has been that eventually the flux builds up in the vents and then drips back down on the boards. For a simple oven with an air cooler the flux must go somewhere. Better in the ducts than in the oven. Just replace the ducts every ye
Electronics Forum | Fri Sep 07 09:19:44 EDT 2001 | Hussman
Jean, A lot depends on your process. can you add a dot of adhesive after screen printing and before placement? This works well for larger heavier parts. A second suggeestion is to reprofile your board. Try keeping the bottom side cooler. I do t
Electronics Forum | Fri Nov 19 10:56:20 EST 2004 | rlackey
Hi Mike, We mainly use chillers for the operators - we build a lot of thick & palletised boards that retain the heat. Having a chiller means we can pick the board up earlier after the oven & it's cooler. With leadfree you will have higher temperat
Electronics Forum | Mon Jan 15 13:38:29 EST 2007 | realchunks
Check the temp of your pot. It may be getting cooler if you can notice a difference in pump height and density. You may have lost a heater element or two. You can adjust your pot chemestry, but why would you want to if your solder sample came back
Electronics Forum | Wed Feb 04 09:18:57 EST 2009 | stepheniii
You need to profile to the paste. And if a part can't take the temperatures, then you have to have something done about the parts. At one time most components had peak temperature information back when we didn't really need it becuase profiles were
Electronics Forum | Wed Aug 27 14:41:10 EDT 2014 | leeg
We have just acquired a Heller 1800 with the Gen 9 Flux unit on, a couple of questions, is the Gen 9 a good unit? Does it have a standalone cooler? Is it easily retro-fitted out if we decide we would rather have normal extraction?
Electronics Forum | Fri Jun 07 04:57:53 EDT 2019 | gregoryyork
Its more than likely the conveyor is slightly out and needs dropping. You do have a fairly significant contact though so are you sure the Solder pot isnt running too cool for Lead free, needs to be around 275C for good wicking and flow or 250C if lea
Electronics Forum | Wed Jun 24 14:31:36 EDT 2020 | kumarb
Thank you so much for your comments. It sounds very logical as the probes are indeed the original along with the rest of the insides of this machine (270 hours of on time). The entire module is offset by 50-75 degrees cooler so suspecting that the pe
Electronics Forum | Thu Oct 13 18:20:14 EDT 2022 | proceng1
I also believe it is the cause of the issue. I guess you could make a fixture that clamps the board flat. Then you'd have to change the reflow recipe. How was the recipe created? Did you actually profile a populated board or just use a recipe that
Electronics Forum | Wed Oct 19 14:03:47 EDT 2022 | proceng1
Low Temp solder and a cooler profile should certainly help. I do believe that the unbalanced copper is the culprit, but you could try to prebake some boards. To eliminate some kind of manufacturing defect from the equation. Though I'm pretty sure i
