Electronics Forum: downs (Page 306 of 462)

? EQUIPMENT ( optical or video microscope) for post sold.DEFECt

Electronics Forum | Mon Mar 19 17:09:38 EDT 2007 | jmelson

A binocular microscope gives just a little more info than the video would, as you have views from two slightly different angles. A good stereo microscope gives more resolution or sharpness than video can. You have to take the time to set up the eye

soldering robot

Electronics Forum | Wed Apr 11 16:09:16 EDT 2007 | egrice

Robot soldering has never really worked well and if you are looking for any volume or repeatability, you may be disappointed! Even though you are using a robot, you are still soldering with an iron and wire solder. This process cant guaranty the be

How long can you leave paste - update

Electronics Forum | Tue Apr 03 05:46:35 EDT 2007 | chrissieneale

OK - going to set up some measurements so we can see how big this problem is. I've got the following so far... Number of boards pasted per employee per shift Number of hand placed parts per employee per shift Number of people per shift Time pasting

How long can you leave paste - update

Electronics Forum | Mon Apr 09 16:46:54 EDT 2007 | stepheniii

Basically its spec. gives surety regarding its > chemical and physical properties. if he doesnt > follow the spec then may be he may find good > physical soldering appearance but chemically it > may goes down through Electrical or Environmental

Mix Technology Board Processes

Electronics Forum | Mon Apr 23 10:11:11 EDT 2007 | grayman

Glue application is widely used in my country.However, some companies want to save cost and remove the glue application. We are also using fixture to cover some components. It has no problem. Please try cleaning your fixture by alcohol or water.Brush

Reflow oven profiling - frequency ???

Electronics Forum | Thu Apr 26 08:27:30 EDT 2007 | ck_the_flip

If your product mix is similar in terms of thermal mass and componentry, find some standard setpoints (by doing a baseline profile) which will produce a thermal profile that's within the specs. of your solder paste and product. This approach usually

Solder Recovery

Electronics Forum | Wed May 02 10:37:59 EDT 2007 | DG

We have 4 EVS machines in our facility. The operators like them, maintenance doesn't. The PM's aren't that bad it just that maintenance doesn't like doing them. On a few of the earlier machines we have if the operators are not careful they can get mo

Solder wave shutdown

Electronics Forum | Thu May 24 15:09:41 EDT 2007 | ck_the_flip

Mf Eng, I am impressed! A real Engineer, quoting from his sophomore year Thermodynamics class, "energy is neither created nor destroyed." I believe that's the 1st Law? I agree with you on your points, 'cause it'd be my guess that if the pot is lef

HELLER 1800W ELEMENTS

Electronics Forum | Wed May 30 09:53:05 EDT 2007 | mmjm_1099

Hello all, I have some issues arising with having to change some bottom heater elements and blowers. Can someone tell me how diffucult it will be to accomplish this with no trianing back ground on this. I have opened the books and made sense of most

Losing parts in reflow

Electronics Forum | Wed Jun 13 15:56:35 EDT 2007 | ck_the_flip

I experienced this with a high-mass capacitor. I was able to turn down the bottom-side convection (around 50�C lower than each of the top-side heaters), and able to NOT lose any parts. I got the bottom-side part just slightly over liquidus, and min


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