Electronics Forum | Mon Aug 19 15:21:17 EDT 2013 | marcelorotofrance
Hi Rollon, thanks for your answer. At this point it seems that cold-start current surge, because the presence of large value capacitors in the power source, exceeds the sensitivity of the protection switches rather than a malfunction. Nevertheless, i
Electronics Forum | Mon Sep 23 12:59:12 EDT 2013 | pauldavis4
New pcba supplier sent us first article pcbas (SMT, Wave & hand solder operations) that failed our testing due to no-clean flux residues found under ICs and around passive capacitors. Second lot came in and had 100% pass yield, but we still see a cl
Electronics Forum | Thu Sep 26 16:05:52 EDT 2013 | hegemon
JBC is a great performer, but tips can get a bit expensive. If you are working smaller parts like 0402 and 0201 capacitors, go with the JBC Nano Station. We have 3 stations, each with dual Nano soldering irons. The balance of our stuff is H*kko Fo
Electronics Forum | Fri May 23 19:59:26 EDT 2014 | jhaye
hi everyone, I just got some question with regards to the life span of components from the date it was packed from supplier. Does the parts more than 2 years from the date it was process by supplier: 1. Can it still be used in PCBA?? 2. will it not
Electronics Forum | Fri Jun 06 16:25:03 EDT 2014 | spitkis2
Component manufacturers subject their lots to thermal / reflow testing per IPC /JEDEC STD-020. This involves running the parts through an oven 3X with a peak above 260C. I am not certain if passives go through the same test (theoretically they shou
Electronics Forum | Wed Feb 25 15:16:56 EST 2015 | dyoungquist
We have MY12 and MY15E machines. I am going to assume what we are seeing also applies to the MY100 series machines as well. Do you have the electrical verifier option that works with the midas head and centering jaws to check component values of
Electronics Forum | Wed Apr 22 10:08:52 EDT 2015 | emeto
I assume you are running Lead paste and that is why your parts are moving during reflow. Most probably these caps have leads that are bended in random directions(look at some parts from the bottom and observe how symmetrical the leads are). In additi
Electronics Forum | Wed Apr 22 21:21:06 EDT 2015 | comatose
We see this from time to time. Usually, one of the leads of an electrolytic is attached to a ground plane, and the other to a trace. The ground plane acts as a big heat sink and reflows significantly later than the trace. If you have glue in your li
Electronics Forum | Tue Aug 11 09:55:49 EDT 2015 | rgduval
I'm no clock expert, but, even that unit you linked appears to have the period set by the weight on the pendulum. That unit notes that the pendulum is adjustable....though, I'm not sure how/what is adjustable...I would expect it to be the weight. I
Electronics Forum | Tue Sep 01 11:12:18 EDT 2015 | zombee
Problem is solved! There wasn't voltage on motor inputs (only 5-10V AC) when the motor connected correctly, but was ~210V AC without motor. Firstly, I exchanged the motor speed control relay (Panasonic G-series type), but the result was same. (the a
