Electronics Forum | Sat Aug 21 02:16:42 EDT 2010 | isd_jwendell
I do not have a QSP-2, but build boards where others have done the layout. Some have not included fiducials, and I am left finding other things. Some boards have complete tenting over the vias, so not all PTH pads will work. Drill holes are not as ac
Electronics Forum | Thu Sep 02 08:48:44 EDT 2010 | rway
You stated, "The larger the fid dia, lesser is the accuracy during recognition." I don't necessarily disagree as far as the positioning of the fiducial in relation to the camera. In fact, I believe this to be the case and with a perfect fid, this i
Electronics Forum | Thu Aug 12 11:00:42 EDT 2010 | hegemon
Without seeing a picture, my first instinct would be first and foremost some fixturing that provides full support for your print process. After that, since you are citing bow and twist, consider that the fixturing might as well travel through the ov
Electronics Forum | Wed Aug 11 19:06:16 EDT 2010 | 1036
We are small PCB assembly business and new. We built 100 boards for my customer recently and 1 of them failed to the function testing. We visually inspected the board several times and do not see any assembly problem. My customer asked us to trouble
Electronics Forum | Mon Aug 16 14:43:44 EDT 2010 | dan_ems
Hello, i don't know if is possible to dispense paste but for reduction of cost we use a diferent type of stencils, from aluminium of 0,2 mm, purchased from a typography of newspapers. Ofcourse the pcb for what we use this stencil are simple. But th
Electronics Forum | Mon Aug 16 20:50:05 EDT 2010 | adhesivedispenser
CiXi Tian Hao Electric Technic Co.,LTD manufactures adhesive dispensing equipment and may be able to offer assistance with your application. Check out our product information at http://dispensing-th.com. We manufacture dispensing equipment ranging fr
Electronics Forum | Sat Aug 21 02:27:21 EDT 2010 | isd_jwendell
The paste you dispense will not solder the same as the one you use with a stencil. The paste for the stencil will have a higher metal content. I was not working with dispensing as small as you are, but after evaluating the cost of the stencil vs. lon
Electronics Forum | Tue Aug 17 10:26:26 EDT 2010 | quest@fr
Our customer ask us how many repair (component removal, change and soldering) we guaranty for SMT components on our printed wiring board. We all have the number "3" in mind but we can't justify it by a standard. We can't reply "state of the art". Doe
Electronics Forum | Tue Aug 17 15:58:14 EDT 2010 | rob_thomas
IPC-7711/7721 states under Scope section: "This document does not limit the maximum number of rework, modification or repair actions to a Printed Circuit Assembly". This is from Rev B of this standard. There are many factors that play a role in the d
Electronics Forum | Wed Aug 18 09:41:47 EDT 2010 | namruht
Are you controlling humidity in your plant? I'm > not familiar with that particular paste, but some > pastes are sensitive to a humid environment. We > also had one paste supplier send us a batch that > had excessive solder balls if the boards