Electronics Forum | Fri Jan 20 09:28:54 EST 2012 | dmiller
3-5% is extremely high. Think of that in terms of DPMO. 5% fallout would be a 50000 DPMO. That's not acceptable for most people.
Electronics Forum | Thu Jul 18 11:31:03 EDT 2002 | Mark S.
>But since we are a low volume high mix operation I need to account for almost every part used. I'm in the same boat, and we do more changing of feeders than actual placements it seems. What I have done which has improved things a lot is in our MRP
Electronics Forum | Mon Apr 28 11:52:28 EDT 2003 | hruiz
Thanks for your responses, as gregp says, one hour in changeover is not good when you run only 10 panels, we alredy do from 10 panels to 2500 boards per run, depends on the product, we already have a pre-kitted area mounted in their respective feeder
Electronics Forum | Tue Apr 29 02:48:18 EDT 2003 | chrissieneale
Thanks for your replies guys, i definately will look into the retapeding option as on further inspection of the line yesterday i found that some of the reels have a crappy plastic on top of them that our feeder literally just pulls off, exposing lots
Electronics Forum | Thu Apr 08 03:41:19 EDT 2004 | Ian White
I have worken in production lines where attrition rates were measured and acceptable limits were set using 3 classes of parts:- A=Expensive Parts IC's etc, B= medium cost parts Diodes, tants etc, C= low cost parts typically Chop Caps and R's. We set
Electronics Forum | Fri Nov 21 13:37:36 EST 2014 | gregp
If there are parts "non-identifiable" then you don't know their cost. Parts under a certain cost you don't worry about. That leaves only category "A" parts to concern yourself with. Know your attrition rates especially for parts over a certain cos
Electronics Forum | Mon Sep 27 18:06:26 EDT 1999 | Scott Cook
| Does anyone have any figures on what % extra compnents should be supplied on chip components for a particular product build. Typicaly there is wastage due to dropout in loading, 1st board build and machine rejections. Is there any industry standard
Electronics Forum | Thu Apr 24 17:49:37 EDT 2003 | pbc1963
Ken, We're talking pennies. Even though the cost of a reel would be cheaper than trying to account for lost components I have to come close in figuring this attrition amount. Reason being is to try and prevent unplanned shortages. I am in constant
Electronics Forum | Thu Nov 06 16:26:38 EST 2003 | Rocky
I would just like to add that here at 3M we have worked with various equipment manufacturers in resolving issues of psa cover tape delamination due to higher tension feeders or adhesive build-up in collection bin type feeders. If anyone is interested
Electronics Forum | Sat Feb 04 23:09:00 EST 2012 | jorge_quijano
Thanks for the info, I will check tolerances and the quadaling option. As an update I ran this past week and machine was arround 5% for a very small lot size, for a larger size lot it was less than 2%, Now I know it still higher than our newest machi
