Electronics Forum | Tue Jul 13 06:49:53 EDT 2004 | imtiaz
In one board we are using 213 SMT components out of which 23 components are lead-free and the rest are leaded. The paste used is also leaded. Do we have to make any changes in the profile of our reflow oven ? Also will there be any negative effect on
Electronics Forum | Wed Jul 14 00:50:34 EDT 2004 | Grant Petty
Hi, What's the best process for going lead free? Ordering lead free parts and using them with current paste, and then once all the parts are lead free, moving to lead free paste as well? Then the wave will be fun to change over. What a nightmare th
Electronics Forum | Tue Jul 13 14:47:35 EDT 2004 | cyber_wolf
I have a brand new X/Y/Theta table for an SPM(The one that uses magnetic supports) that I would like to trade for an older version table.(The one that has holes drilled and tapped in it.) the one I trade for has to be in good condition. No stripped h
Electronics Forum | Tue Jul 13 14:48:49 EDT 2004 | Mark
I was wondering some input on what to use for measuring height on our solder paste for SMT placement. Is there a place to buy a machine or a scale in which you can use? I know in the past I have used a laser scope at another facility but where I am n
Electronics Forum | Thu Jul 15 07:08:29 EDT 2004 | pcbrown
Basically, it's a tilting problem of certain devices. Usually with axial by-pass caps tilting, which pulls the lead up through it's mounting hole. Other problems with components with leads cut to lenght to eliminate post-wave trimming. All suggestion
Electronics Forum | Thu Jul 15 22:19:04 EDT 2004 | KEN
Yep, but its hard to contol small parts with the bags. They're good for DIP's and sockets, connectors, but radials are kinda hit and miss. I bought mine from Pentagon EMS. They only use the finest european leather (kidding). PENTAGON EMS 10950 SW
Electronics Forum | Mon Jul 19 08:52:02 EDT 2004 | Omega
Try spraying flux on top of the loaded PWB when you put it on the conveyor. The tackiness of the flux does a pretty fair job of keeping the axial leaded parts down to the board. This takes more cleaning, but it has worked wonders for me on assemblies
Electronics Forum | Mon Jul 19 08:55:54 EDT 2004 | dwanzek
Thanks, good input. The joints do seem to wet well, they pass solderability test we have done. The defect is apparent right after reflow, before wave solder. No we do not profiled with the oven loaded..... good idea. We run an ovenrider each shift an
Electronics Forum | Fri Jul 16 11:12:15 EDT 2004 | pr
I agree with Russ, sounds like a golden oppty, for wrong part placement. You may look into dedicating certain feeder locations (high running common parts) so that they won't need to be changed after each job. It can affect tact time but in low volume
Electronics Forum | Sun Jul 18 21:36:42 EDT 2004 | KEN
This is the least desirable method (mirroring). 1. X-ray inspection becomes difficult. I will repeat: x-ray inspection becomes difficult. False fails go up. True fail detection goes down. 2. Remove and replace becomes challenging. You really
