Electronics Forum | Sun Jun 24 12:32:22 EDT 2001 | Stefan Witte
I was dreaming about a real easy to use assembly machine. The software was written for operators and did not require more than a few hours training. Machine operations and board programming was written in clear language, icons, pictures and machine e
Electronics Forum | Mon Jun 25 20:39:08 EDT 2001 | ianchan
Hi mate, no complete info given from what i see, so just some humble comments, mayhaps you review : 1) PCB pad finishing - Copper+nickle plated? coz if so, nickle is a KILLER to good solder wetting. what we did back here, was to HAL coat the nickle
Electronics Forum | Sat Jul 14 10:34:42 EDT 2001 | davef
This portion of SMTnet is intended for people whining about the operation of the forums and what-not. A lot of the people asking questions like your use the production forum. We don't have an air knife on our wave, but I recall some threads on SMTn
Electronics Forum | Thu Jul 26 21:16:18 EDT 2001 | djarvis
Dave, We don't do any inspection. Before everyone says "bull...t". Let me explain. We are an OEM. I spent six years in subcontractor hell and wouldn't go back for all the tea in China. It took me two years to convince them when I first got here but I
Electronics Forum | Tue Jul 24 19:26:20 EDT 2001 | johnmaetta
Thanks Dave. We develop high-speed telecom PCB assemblies that use uBGA and other fine pitch components. Our policy has been to use an NC process at our CM. Our engineering group, who is also a customer, and uses these assemblies for development,
Electronics Forum | Thu Feb 03 11:20:15 EST 2000 | John O'Brien
This is getting to be a more common practice, especially with the application of a 2-D bar code directly to the board (via laser, ink jet,etc.) Some really major companies are jumping on the bandwagon because it also allows treating each board as a l
Electronics Forum | Sat Feb 05 21:58:08 EST 2000 | Stu Leech
I agree with all of the previous comments. 1) Here are a few things to keep in mind when cleaning with water. To effectively clean, any liquid must wet the surface. By itself, water has a surface tension of 70 dynes/square cm. This is relaively hig
Electronics Forum | Mon Jan 31 14:08:26 EST 2000 | Ashok Dhawan
I have got a number of assemblies back from a customer with feedback that the solder fillet is less than 25% of chip height per IPC-Standard-610B Class 2. Most of my joints are having good wetting but fillet height does not meet min ht requirement of
Electronics Forum | Wed Jan 26 12:48:56 EST 2000 | Wolfgang Busko
What does easy to use mean? From operators view: - simple input menue - precise error messages with suggestions what to check first - trustable feeders - low noise - feederchange possible without stop - automatic pickup-position alignment - safety fe
Electronics Forum | Fri Jan 21 19:27:54 EST 2000 | Scott S. Snider
With the Siemens line computer it is possible to see what the maximum placements per hours should be for any given job/setup. After you optimize the job you should check that and see how you perform against that number. In many cases the placements
