Electronics Forum | Mon Jun 25 10:35:39 EDT 2001 | rkevin
Despite all my efforts I cannot eliminate icycling on my t/h leads. They come and go.... daily, lots of rework. I have eliminated the following from the scenrio: Inadequate flux to promote quick drainage, Pot temperature too low, Soldering surface
Electronics Forum | Thu Jan 13 12:51:30 EST 2000 | Dave F
David: I'd suggest: 1. Cutting and not bother desoldering all leads (to save the pads). Trust me, desoldering is not as easy as some would lead you to believe!!! 2. Levering that puppy offa there with a screw driver and some "padding" to protect t
Electronics Forum | Wed Nov 24 08:44:00 EST 1999 | Chris Jackson
I have a PCB that I am looking to do selective soldering. I am looking at several systems (IE Seho, Pillarhouse, Premier Tool Works, wave pallets). The board is mixed SMT/PTH, but only has SMT on topside. It has 4 PTH(2 leads ea)components (.030 lea
Electronics Forum | Fri Oct 29 13:45:03 EDT 1999 | David Vulcano
We are placing several axial components that have STEEL leads. Have noticed that the steel components do not get good flow thru(we manufacture to IPC-A-610 Class II Standards which reqires 75% flow thru) We are using Seho Wave Machines with Nitroge
Electronics Forum | Mon Nov 01 15:47:21 EST 1999 | Jim Snipes
Dave thaanks for your quick reply. The flow through probelm exists on several component, Examples; small Tan electolic caps.,electrolic epoxy caps. and one specfic lad on a resistor network. I have veried conveyor speed and readjusted heat sett ings
Electronics Forum | Mon Nov 01 17:13:37 EST 1999 | Mark W.
Jason, What is the revision of IPC you are referring too?? IPC 610 rev. b requires 75% fill on classes 2 & 3. Class 2 does allow the exception of 50% fill if the PCB has a Metal Core or Thermal/Heatsink Plane provided that the solder extends 360 de
Electronics Forum | Mon Sep 20 10:17:19 EDT 1999 | Jeanjean
Hi all, As a student in elctronic sciences, I'd like to know why there is a difference in the voltage required for PC boards with surface mounted devices and the voltage needed by traditionnal components like leaded film capacitors? I wonder if it
Electronics Forum | Wed Jun 23 18:23:32 EDT 1999 | Tom B.
Even though you may find a pad-pad thru-hole spacing, part body size, orientation, and insertion head tooling clearences may be the deciding factor in spacing. 1. Part body diameter will dictate component centroid spacing. ---[][][][
Electronics Forum | Wed Jun 23 13:08:09 EDT 1999 | Dave F
| | Cunli: Chrys is not the only one. Check the following: | | | | "Lead Free Solders - A push in the wrong direction?" | | Dave, | | Thank you for letting me know. We will get in touch with the contributor right away to correct the entry. Loo
Electronics Forum | Thu Apr 22 14:09:50 EDT 1999 | Rick
| | | Do solders exist that are both lead-free and low-temperature (e.g. 100-170 Celsius range)? If so, who supplies these materials? Any websites or contact information would be most helpful. | | | | | | Also, I am not an expert on soldering, s
