Electronics Forum | Fri Jun 14 00:47:17 EDT 2013 | mun4o
Thanks , Reese.Yes , I check the capacitors with C-meter.When measured with C-meter , all capacitors are OK - +/-10% of the value. I can not underst?nd "Note: This is not a summation). Y5V -- -20% of nominal value, -part tolerance, -machine toleranc
Electronics Forum | Mon Jun 17 09:52:33 EDT 2013 | sara_pcb
My circuit board contains 11 x 11 matrix 1mm pitch BGA, The device was tested in socket on evaluation Board. We handed over the actual PCB & devices for re-flow. The assembly house first re-flowed all the SMT components other than BGA. BGA was placed
Electronics Forum | Thu Jun 27 17:32:35 EDT 2013 | tpost
We recently had a question come up regarding the amount of solder on a flat underside termination ( we referenced Flat Lug Lead in IPC 610). Judging by the photo you can see on the Left is a target solder joint, but on the right is one which had rewo
Electronics Forum | Mon Jul 01 13:19:55 EDT 2013 | emeto
I always look for a toe fillet if the design allows you to. Many times the pad design is close or exactly the size of the leads which makes people to touch it up right away. I told them hundred times not to but...Luckily I have 3D x-ray and I can tel
Electronics Forum | Mon Jul 08 08:29:14 EDT 2013 | emeto
You can use any metric ruler to do that. Examples: Pitch 2mm x 200parts = 400mm length or Pitch 4mm x 100parts = 400mm length You can also calculate approximately how many parts you have on the tape by using formula. I don't have the formula but
Electronics Forum | Fri Jul 12 17:48:38 EDT 2013 | ericrr
So why is the number of wraps = (Outside diameter - inside diameter) / twice the the thickness of the tape surely if the tape thickness was 5mm and you had 20 wraps it would take up 100mm not 200mm. I made a posting here some time ago, over a year
Electronics Forum | Thu Jul 25 12:15:56 EDT 2013 | ericrr
I was flicking through the "Element14" (previously known as Farnell) BIG catalog (looking at the pictures) far superior to looking via internet. and found the closest to what you are after a five pin version. "Battery Interconnection System" Header,
Electronics Forum | Thu Aug 08 04:54:35 EDT 2013 | alexeis
Hi, I want to add some clearance to my question that I didn't speak about preparing files for Samsung SMT machines. I am speaking about process of SMT carts preparation (offline) and process of SMT feeder/component replacing when it is on the SMT li
Electronics Forum | Sun Sep 15 04:45:22 EDT 2013 | jandon
Cleaning and lubrication requires maintenance training. You can really break something if you don't know what you are doing. For example you can break your expensive rubber nozzles or cameras with inappropriate cleaning. Check: - Piping and joint -
Electronics Forum | Mon Aug 19 10:25:19 EDT 2013 | jaimebc
Using ERSA Ecoselect. I am curiuos to hear from other selective solder users as to what is the ideal lead lenght for your application on thru hole components. Shorter leads have helped us decrease solder bridges. We find ours to be from .75 mm to 1
