Electronics Forum | Sun Nov 08 15:27:25 EST 2015 | davef
Thinner: Flux thinner, NOT paint thinner We kept a spare stone in thinner in inventory. We cut PVC pipe to size, cap in one end, screw thread on the other, stone inside, filled with flux thinner and covered with a screw cap. I don't remember who we
Electronics Forum | Mon Nov 09 09:44:22 EST 2015 | davef
Purpose. This describes setting-up a wave soldering system set-up for a new assembly design or checking a wave solder machine operation with a test board. Applicability. To be used for new design printed circuit assembles and during machine accept
Electronics Forum | Fri Oct 10 05:04:26 EDT 2008 | bing007
We are using Mulicore MF101 flux and a Vitronics selective soldering machine on a lead-fee assembly and are having trouble with nozzles blocking even when the nozzle aperture is increased. Has anyone come across this problem before using fluxes with
Electronics Forum | Mon Aug 13 21:04:15 EDT 2001 | davef
What??? You don�t have enough things to monitor? The origin of some profiles is mysterious. It�s probably good to try to understand such mysteries. Certainly, the important determinants in the design of your reflow profile are: * Paste you�ve sel
Electronics Forum | Tue Jun 14 17:32:44 EDT 2011 | davef
It depends on the flux and the down-stream processing ... * If there is adequate down-stream cleaning: We are ambivalent. * If the flux is low residue and there in no down-stream cleaning: We don't like using a syringe because it squirts liquid flux
Electronics Forum | Wed Dec 21 17:11:58 EST 2011 | davef
Kim: We understand what you're saying. For us, fluxing the BGA and activating the flux are the issues. * If you're squirting liquid flux under the BGA with a plastic bottle with a needle tip on it and then reflowing less than the whole board with a
Electronics Forum | Wed Feb 07 21:56:00 EST 2001 | davef
Every critter out there with large incisors adapted for gnawing and nibbling has a different theory of solder ball formation. [My theory: It�s punishment for using NC fluxes. Stand and deliver. My solder balls end-up in the gross filter connected
Electronics Forum | Tue Nov 13 19:58:28 EST 2001 | davef
No. I have never measured the temperature of the top of a BGA package during wave soldering. Mr. Kelly�s "actual body temperature" of 140-150�C during wave soldering is probably accurate [most of the time]. It�s the utility of this measurement tha
Electronics Forum | Mon Jun 13 01:31:36 EDT 2005 | buchi79
Devef, The stand off height is 75micron. We only clean the product after underfill process. Dispense epoxy under the FC & cure it before aqueous wash. Samples are sent for LPC (liquid particle count) Test to ensure cleaniness. By the way, our plant
Electronics Forum | Wed Aug 13 09:11:19 EDT 2008 | rgduval
Shane, We're assuming that the software is similar to our Heller 1800. We're also assuming that the oven has thermocouple ports, and that you have the thermocouples to plug into them. From the screen that displays the zone data, there should be a
