Electronics Forum: add and cpu (Page 9 of 11)

Re: Standard pad sizes for reflow and wave

Electronics Forum | Fri Sep 03 14:37:45 EDT 1999 | JohnW

| | We've noticed that there are many different recommendations for pad sizes for various SMT parts. This seems to vary wildly from manufacturer to manufacturer for the same case sizes. Is there any standards that can used used to specify these siz

Re: Standard pad sizes for reflow and wave

Electronics Forum | Mon Sep 06 19:59:59 EDT 1999 | armin

| | | We've noticed that there are many different recommendations for pad sizes for various SMT parts. This seems to vary wildly from manufacturer to manufacturer for the same case sizes. Is there any standards that can used used to specify these s

Re: Help on Qualification of Printer and Pick Place

Electronics Forum | Tue Oct 27 15:25:02 EST 1998 | Stefan W.

Hi Samson ! In order to give you more detailed information I would like to know what your component range is and how many boards you supposed to do. Panasonic and MPM are a good choice, however, Panasonic has not many P&P machines on the U.S. market,

Poka yoka tool for assembly of chip capacitors and resistros

Electronics Forum | Mon Sep 08 11:38:52 EDT 2014 | spoiltforchoice

They key requirement before any fancy tools is careful storage, stock control, labeling and handling. If your parts are incorrect before they even get to production, you're screwed. As gregp suggests, to get consistently correct value and orientation

Re: Adhesive Dispenser Vs. Screen Printing Adhesives Pros and Cons

Electronics Forum | Thu Oct 12 22:16:59 EDT 2000 | Dreamsniper

Hi Guys, I'd like to share this to all of you...you can start playing with the rests...Stated prices, if not indicated, are in Aussie $ or Singapore $. Stencil Printing Adhesive Pros a) Less Capital Equipment Cost (Short Term). In reality it is f

SMT line expansion - new oven and selective solder

Electronics Forum | Sat Feb 22 11:37:00 EST 2020 | kylehunter

Hey all, I've made a post in the past about us expanding to a new space, but I wanted to do a new post with specific questions. We currently have a DEK 265, Phillips Opal Xii, and a Heller 1500. Our main reason for expanding is to have a lead-free

Soldering lead free and leaded tin in the mix in one machine

Electronics Forum | Tue Dec 15 14:38:23 EST 2020 | emeto

I have done it different ways on different equipment. 1. Remove alloy one from the machine. Add alloy two only. and use it.For next board, do the same. 2. There are machines with separate sections for PB and PC-Free, so pots are away from each other

Adaptable PCB support systems for use in pick and place machines?

Electronics Forum | Tue Aug 04 14:56:27 EDT 2015 | sarason

Adding to my previous message this could be solved fairly easily for the general case with a jig made from 3.2 - 4mm aluminium aircraft grade plate. you would machine the bottom side edges to give a 1.6 mm thickness, then machine the top side to leav

Possible to mix a No-Clean solder and a Clean solder process

Electronics Forum | Thu Apr 05 17:06:11 EDT 2018 | stephendo

We recently got a batch wash machine that can use a chemical cleaner. (not a saponifier). NOW I feel confident cleaning no clean boards. Without a machine that can heat water and use a proper cleaning agent, I would not trust cleaning no clean boards

How to Differentiate Class 3 and Class 2 products in terms of process

Electronics Forum | Mon Jan 12 21:31:26 EST 2015 | warwolf

The closer your inspection the more defects you will find, the more rework you do the possible cost you will add and the potential increase of damage you could do to your products if rework is not up to a machine copyable standard. "Is there any in


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