Electronics Forum | Fri Nov 25 14:52:50 EST 2011 | davef
Sn43/Pb43/Bi14 is a low temperature leaded alloy that has been used with very good success. The low melting point helps avoid some thermal shock issues on some assemblies. A word of caution, this alloy forms a low melting point at approximately 95*C.
Electronics Forum | Sun Nov 27 05:06:25 EST 2011 | siaomuay
Hello I'm just study PCB in my company. I found many Surface PCB have some contaminate and can not specify what it is. Size is around 2 mm2 . Sometime I send to supplier and they said it is solder paste or some dirty flux. please see contaminate1
Electronics Forum | Sun Dec 04 15:48:25 EST 2011 | ngineer
I would like to get some parts for my Quad IVc, but it seems the prices of feeder bases / feeders / vib feeders are more than the machine cost me, so I was wondering if anyone on here had extra or spare parts that they would like to part with. I'm g
Electronics Forum | Sat Dec 17 16:46:45 EST 2011 | eadthem
Startup current depends on your configuration. ours dose zones 1,2/ 3,4/ 5/ 6,7 last i checked it pulled about 40-55 ish on start up and 25-35 during run. our profile is a slow ramp till 170c then a fast ramp to 285c 280c(last 2 zones). 1707's
Electronics Forum | Wed Dec 07 17:43:31 EST 2011 | mikenil
Hi I do not work for a board house but a manufacturing facility where we do a considerable amount of soldering wires to through holes. We pretin our through holes on both sides of the PCB prior to reflowing the solder and installing the conductor (w
Electronics Forum | Tue Jan 03 13:44:18 EST 2012 | daxman
Hi comando, If you change a camera, there are quite a lot of calibrations you need to carry out. Firstly: Did you remove the camera from the mounting bracket? If so, you'll need a special jig to mount it back on the bracket properly. You can still d
Electronics Forum | Tue Dec 13 17:41:04 EST 2011 | davef
A Study Of 0201’s And Tombstoning In Lead-Free Systems, Phase II Comparison Of Final Finishes And Solder Paste Formulations http://sheaengineering.com/Documents/APEX%2008%200201s%20and%20Tombstoning%20phase%202%20paper.pdf CONCLUSION The condition
Electronics Forum | Tue Dec 13 15:18:32 EST 2011 | ck_the_flip
DaveF, That's correct. This assembly is plain old tin-lead, but our buyer purchases the bare PCB with lead-free HASL plating. My main concern was the regular tin-lead not coalescing with the PCB plating and having a weak intermetallic. I'm not fr
Electronics Forum | Wed Dec 14 22:13:00 EST 2011 | deanm
I would first check the moisture barrier bag that the parts come in. There is a label showing the MSL level on the bag and sometimes included with the information on the reel. Transfer this info to your MRP system. If your receiving department throws
Electronics Forum | Fri Mar 02 10:20:24 EST 2012 | caerleon
Yes i am trying to install controls. The MSL classification for a part is defined in JSTD033B which i have. I need to update all 5000 plus parts on my MRP system with the correct MSL level (we will be audited on it by BSI). I know that manufacturers
