Electronics Forum | Thu Sep 15 11:16:20 EDT 2005 | pjc
Thanks Steve, good point about warped boards, which are common with doube-sided reflow. Centerboard support helps minimize on reflow. We did do modification to the workboard holders to ensure boards are secured. The boards where small enough that war
Electronics Forum | Thu Sep 15 17:55:18 EDT 2005 | slthomas
Are they worried about the top side SMDs too, or just the bottom side? If it's just the bottom, maybe you can just glue them without reflowing. That way they won't be at risk of cracked solder fillets after AI. Granted, you'll probably be glueing pa
Electronics Forum | Thu Sep 15 11:44:27 EDT 2005 | LeeHoMa
hi Pete, By the way, in your successful example, what kind of soldering method is being used after the Auto-Insertion?
Electronics Forum | Thu Sep 15 03:07:15 EDT 2005 | LeeHoMa
hi All, I am new to this forum and got a technical problem as below. Please see if anybody can help to solve it: I am currently producing one PCB board with 2 side SMD parts and all AI component in 1 side. I try to have both side SMD part soldered(
Electronics Forum | Thu Sep 15 22:12:08 EDT 2005 | LeeHoMa
hi Steve, In fact, I am not so sure which side will have bigger chance to get problem(from my current pilot run, the defect is nearly zero). Top(componet side) or Bottom(Soldering side)? And what is the reason? Customer do not mentioned clearly wha
Electronics Forum | Wed Oct 17 17:43:27 EDT 2001 | davef
2) Open time: A 15-minute queue between paste, place, and reflow SB fine, assuming humidity is not too great. 3) Wash temperature: Yes. A wash temperature of 130-140�F SB fine. 4) Reflowed board was left too long prior wash: Are you washing: * After
Electronics Forum | Thu Sep 15 12:45:12 EDT 2005 | pjc
Your not going to find the document for "guarantee" becuase none exist as far as I know.
Electronics Forum | Thu Sep 15 10:00:28 EDT 2005 | slthomas
I'm curious about one thing. What kind of components are on the bottom, how many are there, and how are you processing (in particular how do you get glue and paste on) them? Edited to add: You shouldn't have any problems (assuming your tooling heigh
Electronics Forum | Thu Sep 15 08:33:14 EDT 2005 | pjc
Is not a problem, I've done it. Be sure the insertion tooling and cut&clinch tooling are set to proper distances from the board. If proper, no deflection of PCBA should be observered during AI. Obviously, your AI Operator must be more careful with PC
Electronics Forum | Thu Sep 15 17:39:08 EDT 2005 | stepheniii
I just wanted to add I'm not saying there is no egineering aspect to this, just that it sounds like it is more to do with your customers perceptions. Ask why they think it could be a problem. Maybe they have had previous experience with it before. I
.gif)
