Electronics Forum | Wed Feb 16 07:55:19 EST 2000 | Dave F
CK: I hear you about pads. Most secondary side SMT pads are primary side SMT pads that are on the secondary side. This only matters when boards are wave soldered. Rather than changing to larger components, consider a bigger fight than that ... ge
Electronics Forum | Wed Feb 09 19:55:27 EST 2000 | Russ
Hello All! I have a problem that hopefully someone out there might have some ideas. I have an assembly that upon the "dental pick test" the entire solder fillet is coming up with the lead and leaving what appears to be a bare pad. I believe that th
Electronics Forum | Thu Feb 10 09:43:42 EST 2000 | Glenn Robertson
Russ - I agree with Dave and Wolfgang that the boards are the top suspect. The idea of "rework" from Gold to HASL sounds scary. Are you sure the Gold is electroplate and not immersion? Resolve that and then check the archives for "dark pad" or
Electronics Forum | Fri Feb 11 05:43:21 EST 2000 | Wolfgang Busko
Hi Russ, I thought about it and what approach I would do. All that talk about causes and reasons doesn�t solve the problem. To determine wether it�s the PCB, the component or the process I would take a bare board, a component ( and maybe a different
Electronics Forum | Tue Feb 15 09:48:33 EST 2000 | Casey Scheu
Mario, Good Luck. Your not likely to find a used unit. The Flo-Master SMD-5000 is a great unit that dosen't break. We've had units working 2 shifts for over 3 years without a single spare. When a unit works this well people don't give them up.
Electronics Forum | Tue Feb 22 23:52:06 EST 2000 | Finepitch Services
Jax, I appreciate your opinion and no one is right or wrong during such information sharing. Please consider that we all inherit a system and keeping it in the same way is the choice in most cases. Also, "keeping the mm across the house" is not gi
Electronics Forum | Wed Feb 09 13:07:01 EST 2000 | Jeff Woodruff
I have seen an issue that escapes our ICT and functional testing or operates in an intermitent fashion. The lead is slightly separated from the PCB with a fully formed solder joint behind it at the heel an toe. The joint apears to have started to tra
Electronics Forum | Wed Feb 09 21:53:09 EST 2000 | Dave F
Jeff: Two things come to mind (if that's not stretching things too much ...): 1 You've got something unsolderable and not removeable with fluxes is on your component leads (or you don't have enough stomp in your flux). Do the leads that don't sold
Electronics Forum | Fri Feb 11 13:36:40 EST 2000 | Finepitch Services
Jeff, I guess my experience in such issues always took me back to the screen printing process and I only want to bring up that portion of the possible causes to this case. When we talk about coplanarity, the component lead coplanarity first comes t
Electronics Forum | Wed Feb 09 08:54:42 EST 2000 | pascal MATHIEU
Hello friends , in order to try to reduce our labour cost , we are thinking to replace manual placementof PTH COMPONENTS by automatic unit which 'll be able to place relays ,and connectors . is there anybody on this forum to advise us on this topi
