Electronics Forum | Tue Feb 11 17:14:50 EST 2003 | Matherat
Traditional methods of hand assembly are as you described. For a company that is concentrating on the 1-5 or 5-50 quantities you've described, you need to look for ways to accomplish your task with speed, repeatablilty, quality and at a fair price. T
Electronics Forum | Mon Aug 19 16:57:38 EDT 2002 | dragonslayr
Individual process steps are approximately the same length of time for reworking a BGA. You seem to be comparing the use of the automated SMT line versus an off line rework station. Consider that the off line station is a complete paste print, pick
Electronics Forum | Fri Dec 16 11:27:11 EST 2005 | russ
The data sheet for the paste will tell you how long it is supposed to be in the oven. Number of zones is not really relevent.
Electronics Forum | Fri Apr 11 15:30:42 EDT 2008 | hussman
How do you assure your operator follows this math? Our operators can't even pull their pants all the way up or wear their hats on straight.
Electronics Forum | Fri Dec 16 10:45:41 EST 2005 | campos
Hi,, My doubt is regarding to the Reflow Time, I mean, in a 5 or 7 zones oves, how long the board should stay inside the oven to complete the soldering cycle? 4 min, more, less...Should I keep low temp until peak for a long time or high temp in shor
Electronics Forum | Fri Dec 16 11:04:23 EST 2005 | chunks
Over all time will be dictated by your conveyor speed. Your conveyor speed will be dictated by your products time above liquidous. Time above liquidous is dictated by the manufacturers specification. Time and temp before reflow will have to be ach
Electronics Forum | Tue Feb 19 10:09:48 EST 2002 | caldon
I always look at the support structure. This is where I feel the real Dollars and cents come into play. Sure you can calculate the derated value over months or years. But If your machine is in a "machine down" situation the derated value does not cha
Electronics Forum | Thu Aug 19 13:29:43 EDT 2004 | davef
Things we�d like to have in a reflow oven are: * Small variation in temperature [+-2*C] from rail-to-rail. * Consistent temperature over time [3+ sigma]. * Thermal inertia / fast recovery to be able to respond to the effects of high mass boards. * Ra
Electronics Forum | Thu Sep 19 15:39:16 EDT 2019 | qanalyst1
When baking parts at 90C that require 15 hours bake time with parts that require 25 hours bake time, is it acceptable to open the oven and remove the former (15 hours) parts and then continue the 25 hours cycle for the remainder of the parts in the o
Electronics Forum | Fri Sep 20 16:41:01 EDT 2019 | qanalyst1
Thank you for the response, yes, the oven is vented. I guess I am concerned for parts with a thinner package body, so I wasn't wanting to leave them in for too long past the recommended bake times.
