Electronics Forum | Sat Oct 18 20:35:25 EDT 2008 | arosario
I see, maybe changing my peak temp in reflow will help. I'll try do eval again... Actually, once I did have evaluated a longer pre-heat but on my previous eval, I didn't change the peak temp. Maybe reflow can help compensate to my problem in the part
Electronics Forum | Tue Oct 21 11:42:04 EDT 2008 | arosario
Hi Shooter, we're not using AOI but we do every 30 minutes sampling Inspection on the board and we're not seeing insufficient paste deposit so far since we started. But I agree with you that seemed my printer is not printing consistent amount of pa
Electronics Forum | Fri Oct 24 13:21:12 EDT 2008 | evtimov
Hello Bong, I would make one test only. Make one batch using the problem part from a different vendor. That will answer your main question. For me the part is causing all your problems. If it is possible, change it. Last time having problem like you
Electronics Forum | Sun Oct 19 15:02:10 EDT 2008 | Jdt13
We are having some issues with a RF PCB aprox 1" x 1". The pads are in the bottom of the PCB and it goes on the Top side of the mother board the pads of the RF board are like a BGA (square pads)and we have troubles to make the proper welding in the
Electronics Forum | Mon Oct 20 15:14:59 EDT 2008 | robinj
Yup, just read that in the link Patrick sent. > Thanks again... Im going to have everyone screen > the boards for this carefully before processing. > I have also sent the board manufacturer an email > to get their comment on the matter. No PCB ve
Electronics Forum | Mon Oct 20 17:03:05 EDT 2008 | davef
Josh From looking at your pix, we don't have a clue. [And we're going down to the nurse's station to get our eye checked because we don't black bubkus.] More than anything else the: * White on the pads could be solder * Copper-penny brown on the pad
Electronics Forum | Tue Oct 21 07:44:44 EDT 2008 | patrickbruneel
Dave, I know that black pad isn't solderable by any alloy. But it's still justified to relate the nickel barrier plated boards to lead free. Before lead free the predominant board plating was HASL and OSP. These platings disappeared with the switch
Electronics Forum | Tue Oct 21 04:45:13 EDT 2008 | stanyserrao
Head 1 is not placing the parts in production. Same component is placed by head 2. Head 1 camera is camera 12 type and head 2 camera is type 8. Machine re-set done resent proper data and interchanged cameara still same problem was foundd in head 1.
Electronics Forum | Thu Oct 23 12:31:56 EDT 2008 | jdumont
We use Cooksons prepaid "Pot-Rite" program which sends you as many preaddressed envelopes and order sheets as you order. When it comes time to send out a sample you just pop it in the envelope and mail it out. They also have all the molds and ladles
Electronics Forum | Thu Oct 23 13:05:12 EDT 2008 | slthomas
If you're questioning their motivation for testing accurately, I'm sure they would *love* to sell you stuff to balance your alloy composition ratios or just replace all of your solder outright. IOW, I don't think you need to worry about them paddin
