Electronics Forum | Fri May 14 05:50:26 EDT 2021 | williamrobbins
I've only used vacuum reflow on LED boards but I have heard that Vacuum may need to be reduced depending on components. I can't find the source at the moment but it was a study done by Heller I believe. I would experiment with different levels of v
Electronics Forum | Thu Jul 18 12:05:19 EDT 2002 | yngwie
Experts, Today I received PCB in a punctured vacuum seal bag. the Humidity indicator change the colour to pink at 60%RH mark. The brd finish is Entek. Earlier our intention to get the board vacuum seal is because we want to ensure that the is no fr
Electronics Forum | Thu Jul 18 12:20:09 EDT 2002 | pjc
Reject the batch of boards. Take one board, dry it, then check for solderability. If its good, do the rest. If not.....? Contact the PWB vendor for reccomendations.
Electronics Forum | Mon Feb 23 07:09:28 EST 2004 | Erv
We have been using the 3M Electronic Service Vacuum Cleaner for a couple of years. The buisness end (hose and nozzles) is ESD Safe, it's Easy to use, and filters are a snap to change. The case is not ESD Safe, but if you do not set it on or right nex
Electronics Forum | Wed Jan 30 08:27:37 EST 2019 | mst3000
Hi there. We are facing an issue with the placing head of our SMT machine SIEMENS SIPLACE CF 2004 model where the vacuum reading is low (820 instead of 900). This is resulting in that the components are either falling off when the head moves onto the
Electronics Forum | Mon Feb 04 01:26:57 EST 2019 | mst3000
Hi Ry-n, we have checked the hoses for any cracks. The vaccum measuring board was changed also. Its an S20. Thanks, Steve
Electronics Forum | Fri Feb 01 11:17:21 EST 2019 | youngbuck
Hi, Make sure to check any cracked, pinched, kinked hoses. Also when taking the whole gantry off there are clear hoses that can get pinched. Also, may want to changed the vaccum measuring board. Is this a S20 or F4,f5 or hs50 Thanks,
Electronics Forum | Wed Apr 08 11:05:53 EDT 2009 | boardhouse
Hi, Need a little more info, 1) this board is definitely delaminated 2) this board looks like a Std FR4 board with 63/37 Hot air finish with probably 140 tg. material. Was this reflowed under lead free temps? 3) Do you Pre-bake product 4) What
Electronics Forum | Mon Dec 20 19:09:54 EST 1999 | Chris
If your flex circuit is only populated on one side, you can have the PCB vendor palletize the flex for you. What you do is have the flex circuit laminated to 062" FR4 using a thermoset adhesive like Dupont WA. Standard flex circuit adhesive. Howev
Electronics Forum | Tue Oct 24 19:09:12 EDT 2023 | sarason
Possibly blocked air lines did you check air pressure? Also drivers on the relevant boards. or simply damage in the flexible wiring harness( a nightmare) sarason
