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 | Wed Dec 17 10:10:35 EST 2003 | Hiram
Thanks Dave, your comments were very helpful! Hiram
Electronics Forum | Tue Dec 16 19:45:47 EST 2003 | Hiram
Hi, I am looking for the IPC criteria hole-to-lead ratio. Does anybody know a practical way to determine if some holes in my pcb's do not get enough solder in the wave solder machine because an inapropiate hole-to-lead ratio? Thanks in advance! Hi
Electronics Forum | Wed Dec 17 09:53:26 EST 2003 | davef
IPC-2222 - Sectional Design Standard For Printed Board For Organic Printed Boards, Table 9-3 � Plated Through Hole Diameter To Lead Diameter Relationships will give you the standard information you require. If we can�t get proper hole fill after try
Electronics Forum | Sat Oct 30 16:53:19 EDT 1999 | jason
David I have recently taken the IPC-A-610B instructors course and according to the teacher the revised addtion is suppose to be 50 percent fill in plated thru holes
Electronics Forum | Mon Nov 01 09:54:29 EST 1999 | dave r
Jason, Have the class III requirements changed? Dave
Electronics Forum | Mon Sep 17 19:40:05 EDT 2007 | davef
Ken contacted Asymtek. They stated that urethane and acrylic can be used in the same machine provided that he thoroughly flush the system with solvent.
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 | Sun Oct 31 08:27:09 EST 1999 | Dave F
David: I think it's great that you are getting that much barrel fill with STEEL leaded components!!! So, what kind of steel are the leads are made from? How much corrosion is on the leads? Frankly, I don't believe that the leads are made of steel
