Electronics Forum | Wed Oct 10 07:04:41 EDT 2007 | jdumont
How do you guys calculate the total RoHSness of a part? Do you have to know the weight of the leads for instance on each part?
Electronics Forum | Thu Nov 08 08:56:51 EST 2007 | hussman
Sorry Matt, Just hate when people use this site as their engineering bed. I believe you can weigh your board before and after reflow. It would have to be a sensitive scale though. From there you can calculate weight to volume ratios.
Electronics Forum | Thu Nov 08 13:00:33 EST 2007 | russ
Just how accurate do you need to be Matt? you seem to already know the answer, calculate the volume deposit from stencil aperture and divide x 2? that will get you very close wouldn't it? Russ
Electronics Forum | Wed Jul 02 19:14:47 EDT 2008 | arminski
In My Process Cost Calculation in building products for the purpose of Manufacturing Quotation, Is Final QA inpection considered a process step as part of Direct Labor or is calculated as part of an Overhead Cost? thanks and regards,
Electronics Forum | Tue Feb 17 18:07:50 EST 2009 | smt_guy
Hi, How to calculate the proper overhead rate? I seem to see every CM has their own Calculations. thanks in advance.
Electronics Forum | Mon Nov 09 02:39:38 EST 2009 | martinphill
No the machine is not capacity constrained. We do not use IPC-9850. Rated CPH is taken from Equipment manufaturer. Fuji-CP643. Universal HSP4796 We have 3 manufaturing units at different location Difficult to standardize OEE calculation
Electronics Forum | Sun Apr 25 09:10:25 EDT 2010 | sudhir14
Hi, pl. help me , I need details info. on Cp & CPk methodology , how to calculate , how to analysis Sudhir
Electronics Forum | Tue Jun 29 11:46:36 EDT 2010 | davef
Prins: Everyone has equations. Here's one some people use: False call rate = [Number of defective boards, but good at inspection]/[Total number of boards produced] Why don't you ask the people [that calculated the numbers that confuse you] how the
Electronics Forum | Mon May 19 15:13:05 EDT 2014 | davef
Consider this combination: * IPC-7351B - Generic Requirements for Surface Mount Design and Land Pattern Standard * IPC Tools & Calculators [ipc.org/contentpage.aspx?pageid=PCB-Tools-and-Calculators ] * Component fabricator suggestions BR ... davef
Electronics Forum | Thu Aug 27 05:49:53 EDT 2015 | alexeis
Hi, To calculate both values you need: 1. Theoretical speed of all machines (Printer, SMT, Reflow). This is a basic upper limit value of speed. Use it for calculate a maximal theoretical values as upper limit. For real values, read next. 2. High r
