Electronics Forum | Wed Jan 22 21:59:54 EST 2003 | davef
First, wheat beer is not intended to be consumed at this time of the year in the northern hemishpere. It is ment to be consumed on the back porch, while smoking the LARGEST cigar you own, after mowing the lawn on a day that is so hot that the dog ca
Electronics Forum | Thu Jan 23 11:46:37 EST 2003 | gregp
Hi Brad, A couple of observations: 1. You are new to SMT. 2. Your requirements can be met by a variety of low end SMT equipment. Regarding point 1, you will be better off buying a machine from the manufacturer unless you hire someone with all around
Electronics Forum | Mon Jan 27 10:06:03 EST 2003 | binns
Just to set the record straight... Samsung did not build all Quad machines. QSA = Quad Samsung America, The QSA-30 machine platforms were manufactured by Samsung, utilizing Quad feeders, other Quad technology and Quad sales and service. Before the
Electronics Forum | Thu Jan 23 13:35:40 EST 2003 | Randy Villeneuve
We are a no-clean facility and I was asked to develop a cleaning procedure for boards that were repaired. In my opinion I believe that if a board is repaired with a no clean flux and if the flux was not activated (ran in another area of the board), t
Electronics Forum | Fri Jan 24 16:46:21 EST 2003 | MA/NY DDave
Hi, Distance Engineering is always difficult. I am guessing that the old machine and process ran wonderfully / acceptable. If you still have the old machine, how about running an empty board through it and then the new machine. Without flux observ
Electronics Forum | Fri Jan 24 17:05:17 EST 2003 | Hoss67
DDave, I do not have the benefit of having the old machine here for comparison unfortunately. Comparing topside wetting to old sample boards run on the older machine show similar results. No solder balls. I have a thermal profiler and have run ma
Electronics Forum | Fri Jan 24 22:50:51 EST 2003 | MA/NY DDave
Hi Again Distance is tough, besides far less exciting.. You got the panther at your breast, screaming!! Somehow you have to make this go the other way. Rather than solder flowing any old place it wants to, when it wants to. Chasing the heat, Chasi
Electronics Forum | Tue Jan 28 16:27:43 EST 2003 | MikeF
I agree with most of the other suggestions here, but 90 C for a topside preheat temp seems low to me. I remember aiming for 98 to 104 C for topside temp just before hitting the solder. Boards that had large ground/power planes or a lot of layers I wo
Electronics Forum | Sat Jan 25 20:17:40 EST 2003 | ramanandkini
We are soldering a 8 pin TTL chip on to a CEM1 board that has a hot air level soldering. We use no clean soler paste for the reflow process. Now the customer wants us to clean since he is afraid of flux attracting the dust. We have some SMT LEDs that
Electronics Forum | Mon Jan 27 12:27:03 EST 2003 | ksfacinelli
We have an assembly that requires a number of high density connectors to be placed after SMD. The process will not allow a normal wave solder setup due to the population of SMD comps. We cannot use a selective solder pallet due to profiles. We are