Electronics Forum | Tue Jun 10 11:07:33 EDT 2003 | fmonette
Another important element to consider is the impact of ambient temperature and humidity on Moisture Sensitive Components. The majority of plastic encapsulated ICs are classified as moisture-sensitive devices (MSD). This means that they are qualifie
Electronics Forum | Tue Jan 10 08:43:10 EST 2006 | jax
There is no set formula. You need to customize this number around your operation. Depending on how you account for: Capital Equipment Costs Utilities Building Costs Overhead services Consumables ( Flux, Paste, Glue, ...... ) Once you get the costs
Electronics Forum | Fri Jan 21 09:34:56 EST 2000 | Eric Krone
Throughput is usually measured by how many components are placed over the production day. Making sure it is actually placing parts all available hours of that production day optimizes the placement machines performance. The time the machine is actu
Electronics Forum | Mon Mar 10 10:17:15 EST 2003 | gregp
Tact time as defined by the IPC 9850 standard is "the average time required to place a single component while maintaining the specified placement process capability. Excludes transfer time, fiducial time and nozzle change time." Sounds like what you
Electronics Forum | Thu May 06 13:19:57 EDT 2004 | fmonette
Hi Rob, You might want to consider changing your current procedure. Components classified MSL 4 have only a 72 hours floor life at 30C/60%RH. Even if you consider the de-rating factor (table 7-1 in J-STD-033A), at 50% this maximum exposure time wil
Electronics Forum | Fri Jul 02 17:15:52 EDT 2004 | Sam
You can't tell how a machine will perform on your particular board by looking at it place parts at a trade show. Usually they demo a best case scenario (parts in a simple grid pattern, few package types, etc.) You need to supply the board data for y
Electronics Forum | Sat May 09 11:01:59 EDT 2015 | alphatronique
Hi few year back i design a board for a customer then build pre-production run on my in house line ,all was good then the customer for going into production what to save few $ move to my competitor for assembly this was in late fall then in summe
Electronics Forum | Tue Dec 05 15:10:55 EST 2000 | Francois Monette
Victor, here are a few more elements of information to answer your question. Both the temperature and relative humidity on the manufacturing floor have a significant impact relative to the rate of diffusion of moisture inside a plastic package and t
Electronics Forum | Sat Mar 08 02:23:09 EST 2003 | Frank
My two Process Engineers are at odds with each other. One says that the Tact Time is only the actual Pick-n-Place time to build a board, and the other says it needs to include the load/unload time as well as the Fiducial reading time. Example: So
Electronics Forum | Wed Jun 11 11:25:15 EDT 2003 | caldon
Hey Jason- I saw yer post on Technet as well. First I agree with you 100%. It is kind of funny how Capital Equipment Mfr's can lay off Service guys, Apps guys and Customer support Guys (Guys = men/women) but charge more $ for registration fees for
