Electronics Forum | Fri Jun 28 03:04:21 EDT 2002 | Dreamsniper
Forgot to include the following: Dwell time is from 55 secs to 68 secs. Indium specs for the paste is maximum peak @ 228'C and 30 to 90 secs dwell time above 183'C. PCB is a 6 layer board with Dimension of 205 x 166 mm but is slightly dense with 11
Electronics Forum | Tue Oct 01 08:01:23 EDT 2002 | mjz289
WE USE A HELLER 1500 EXL OVEN (5 ZONE OVEN) AND HAVE BEEN DOING PBGAs FROM 292 TO 780 BALLS WITH .O32" PITCH (.8 mm) AND METAL STIFFENERS ON TOP WITH NO PROBLEMS. I AM GETTING 210 - 215 DEGREES C AT THE BGA BALLS WITH 50 - 65 SECONDS ABOVE LIQUIDUS
Electronics Forum | Wed Jun 26 11:13:09 EDT 2002 | robbied
Can anyone help? Our Solder bar suppier is discontinuing the Sn63 Pb37 solder that they currently supply us. Another company has offered us a 'direct replacement' which is their own Sn63 Pb37 solder bar. The only problem I have with this is that the
Electronics Forum | Mon Jul 01 15:37:56 EDT 2002 | pjc
Possible cause can be design related- if the solder land is too small. Check w/ IPC SM-782 Solder Land Design Guide Another is board finish. I have seen problems like this with Gold finished PWBs- which creates a more brittle solder joint.Another pos
Electronics Forum | Mon Jul 01 15:27:37 EDT 2002 | pjc
Upgrading to 1.6 is not going to buy you anything worth the effort. 1.5 to 1.6 is just a software upgrade- no hardware. If you are the original owner of the machine the software is $600 plus cost for field service engineering to install. If you are n
Electronics Forum | Mon Jul 01 16:45:31 EDT 2002 | pjc
Yeah, you'll get the blue button functionality w/ 1.6. That protects the machine by disabling the magazine before its pulled from the machine. It tells the computer not to pick from that mag. Going from 1.4.7 is the same as going from 1.5, just softw
Electronics Forum | Mon Jul 01 22:10:55 EDT 2002 | ianchan
Hi mates, anyone has practical hands-on experience for the "Vectron" AOI machine, model: K2-AOI? appreciate any hands-on experiences shared on this issue. seeking everyone's comments +ve or -ve about this machine, based on its : 1) user-friendly f
Electronics Forum | Tue Jul 02 21:47:44 EDT 2002 | alex_kirichenko
Hello everybody!!! We are going to start loading 0402s and I'm looking into all diffirent sorts of problems. From this forum I see that tombstoning is the main one. I found article about using U-shape appeture design for 0402s. I never had stenc
Electronics Forum | Wed Jul 03 10:30:48 EDT 2002 | davef
First, it's difficult to image anyone [that's fallen off the turnip truck more than once] saying 'there is absolutly no problem' about anything in our business. Second, I have never heard of this �U� shaped 0402 aperture thing. [As someone mentione
Electronics Forum | Wed Jul 03 20:21:26 EDT 2002 | alex_kirichenko
Thanks for responding..... The question I was trying to ask is if U appetures are mechanicaly strong, if the tab in the middle won't stik up and damage squeegee blades? I never had stencil with such appeturs. We are just about to start some trials
