Electronics Forum | Thu Oct 16 11:15:53 EDT 2008 | davef
A good solder connection with heavy ground plane requires: * Plenty of heat [Is the preheater located too far from the wave? Whenever you look at board temperature, there is a sharp decrease in temperature between the preheater and the wave.] * Conta
Electronics Forum | Mon Dec 01 12:39:06 EST 2008 | tsvetan
this is really nice one ;) paper and cotton have lowest potential to generate static electricity see below, and usually is good practice to wear cotton glowe at least to one of your hands to not leave greasy finger spots on the gold finish of the PC
Electronics Forum | Mon Dec 22 20:16:17 EST 2008 | davef
The first question in solving the "ol' SMT component loss after second-side wave operation" problem is: So, what makes you think the components actually came-off in the wave and not during some previous 'handling'? Putting that aside, we'll play thi
Electronics Forum | Tue Jun 02 02:52:24 EDT 2009 | jasreeves
Probably covering old ground here, but when I read marketing data, brochures etc for new P&P machines, they always state the CPH. You know... 12,000 chips per hour or 18,000 chips per hour and so on and so forth. However, you try and place 0201's at
Electronics Forum | Mon Mar 29 11:48:43 EDT 2010 | davef
SAC BGA In A Sn/Pb Reflow Process Conclusion: Area array components (ball grid arrays, chip scale packages, flip chip packages) with Pbfree solder sphere alloys should not be reflowed using a tin/lead reflow profile due to the resulting non-uniform s
Electronics Forum | Thu Dec 16 14:50:49 EST 2010 | rway
What Derek means is, you will have to train new templates from time to time, something you have to do with every AOI. Because there is no established method for marking parts, these markings can change. For instance, the text on chip resistors coul
Electronics Forum | Tue Jan 11 13:12:58 EST 2011 | methos1979
Has anyone had any luck programming using the side cameras to inspect for defects on the sides of chip components? We recently had an escape of a damaged chip capacitor that was impossible to see from the top camera but was clearly visible with the
Electronics Forum | Fri Nov 19 13:07:01 EST 2010 | vmorina
Hello everyone, Talking to my boss today I was able to determine what we're really looking for in terms of reflow soldering. The company is not looking to do a volume run; we're trying to solder chips for prototype boards, which are currently done w
Electronics Forum | Tue Jul 03 16:15:08 EDT 2012 | kq702
Hi, when they did the reflow with the south bridge chipset they took a heat gun and went arround the chip in circles. This is what I did with the broken apple motherboard. I covered the board in tinfoil and cut out the squares arround the gpu, cpu an
Electronics Forum | Wed Jul 24 22:24:07 EDT 2013 | mac5
When we first got our XP1’s the cycle steal was on a schedule. We would have boards running good and then start placing off in the middle of a run. We finally noticed that the cycle steal had run just prior to the parts being misplaced. We have turne
