Electronics Forum | Fri Apr 05 15:25:14 EST 2002 | davef
Spray fluxers: Where does the excess flux [that does not glomb on the board] go after being sprayed at the board? How do various spray fluxers [wave solder machines] route �used flux� differently?
Electronics Forum | Mon Apr 15 18:42:23 EDT 2002 | paulausten
Do the in/out board sensors on reflow solder machine work well? Can they be relied on or do they cause needless alarms? What has been your experience?
Electronics Forum | Tue Jun 25 12:08:14 EDT 2002 | kenbliss
I am curious what the identifications tags actually do. bar code, p/n etc. Are they for in process use or do they ship with the board. Why a tag rather than printing the info on the board.
Electronics Forum | Wed Jul 03 02:15:02 EDT 2002 | fogel
Need some info regarding the terms and conditions of drying bare boards before the assy. process (if need it at all). We encountered latly with delimination in some boards and I'm not sure that it is a product failure.
Electronics Forum | Wed Jul 03 10:32:05 EDT 2002 | davef
First, we have talked about drying / baking / demoisturizing / whatevering bare board previously. Search the fine SMTnet Archives to get started on recipes. Second and more importantly, you gotta fix this delamination problem. If it is delaminatio
Electronics Forum | Mon Jul 29 09:36:59 EDT 2002 | pjc
From the time the last board from "Job A" exits the oven until the first board from "Job B" exits the oven.
Electronics Forum | Thu Jul 18 12:20:09 EDT 2002 | pjc
Reject the batch of boards. Take one board, dry it, then check for solderability. If its good, do the rest. If not.....? Contact the PWB vendor for reccomendations.
Electronics Forum | Thu Jul 25 15:00:37 EDT 2002 | Claude_Couture
1: I use the fiducial mark as bad board mark. 2: First get the X sensor installed on the machine, then use method 1. 3: other methods: group boards according to which unit is X out. Then edit NC program to skip corresponding X out.
Electronics Forum | Fri Jul 26 12:18:43 EDT 2002 | dougt
I'm told that the Contact Systems machines we have will are set up so that if you put a sticker over the fiducial it will skip that board on the panel. I think the machine might prompt the operator that it can't find the fiducial and the operator te
Electronics Forum | Wed Jul 31 17:08:22 EDT 2002 | pjc
Chris, What's the board finish? HASL? What's the frequency of solder beading, like how many joints soldered exhibit these solder beads- percentage wise. Are the boards clean- nobody is touching them with greasy fingers? We need more clues.
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