1257 long board results

Electronics Forum: long board (Page 7 of 126)

Re: QFP On both side of a board

Electronics Forum | Wed Dec 16 10:21:44 EST 1998 | HallJ

| Has any body tried reflowing QFP's on both sides of a board. | This has been done for a long time. The only thing I have seen that could start to cause problems is when you get up to the PQFP208 's that are weighing 10g or more. For this You can p

Putting a center board support on lead free wave

Electronics Forum | Thu Apr 15 11:56:42 EDT 2004 | patrickbruneel

I would try a PTFE (Teflon) wire or Teflon protected wire or you could try anodized aluminum. Its getting more and more interesting how the lead free era develops. Just a thought I wander how long its going to take the tin (not passivated with lead)

Preheating a board with metalic coating on both sides

Electronics Forum | Wed Jul 31 17:25:39 EDT 2002 | sueph

Dave, thanks for the reply. These boards have metal plating covering 99 percent of both primary and secondary surfaces. The only places without the metal plating are the extreme outer edges and about an 1/8 inch surrounding the plated holes. We do

Re: QFP On both side of a board

Electronics Forum | Fri Dec 11 16:06:18 EST 1998 | Michael Allen

G, You'll find at least one old thread in this Forum on dual-reflow if you do a search. I found one dated April 7, '98 (searched on "reflow"); this particular thread includes a discussion about the maximum weight-to-surface_area for successful dual

I am looking for a SMT machine that will handle a large board

Electronics Forum | Tue Sep 12 12:47:07 EDT 2006 | james

I am looking for a Surface Mount Machine that can handle a board that is 24 inches long and 7.5 inches wide. Please if anyone has suggestions, they are greatly appreciated. Also must be able to handle over 50 feeders of various sizes. Thanks

Re: Looking for someone who can fix the servo board of CP 4-2

Electronics Forum | Wed Oct 27 10:22:15 EDT 1999 | a.blair

Fuji is usually the cheapest you will find. I think around $750 for them to repair it. the last time I checked they have an exclusive patent on their PCB backplane design so there would not be any real way to bench test it. they also have rights to t