Electronics Forum | Fri Jun 22 03:11:53 EDT 2007 | vlazern
Our Heller oven is functioning well. However, we see defects from the oven, such as shifted coil inductor components, and missing chip components from time to time. When we re-scan the board at the AOI, the defect was not present at that stage,hence
Electronics Forum | Mon Jun 25 10:08:17 EDT 2007 | slthomas
I don't know much about Hellers other than the 1500 models which don't have blower speed adjustments (except for cooling), but with that much air flow I'd be worried about over working your heater elements. Have you checked in zone setups to see ho
Electronics Forum | Mon Jun 25 19:36:36 EDT 2007 | bga_kid
If you calculate CFM using the numbers you have provided you are pulling 1396CFM out of the oven. I am not sure what Hellers spec is but I know a Speedline OmniExcel Air machine should be set at 300CFM. I do know for a fact that to much exhaust can s
Electronics Forum | Mon Aug 30 02:41:22 EDT 1999 | Dreamsniper
Planning to evaluate the above process... Can anyone can give me some tips/infos on the above.... e.g. stencil aperture design, aperture ratio, common problems and solutions they encountered on the above process, is the profile different from an ordi
Electronics Forum | Fri Oct 31 13:06:42 EST 2003 | Kris
Hi, What would also be important is the time above 217. 20 secs above 225 may be the same as 45 secs above 218 That 7 degres might just buy you enough to sweep the non lead free components through Has anyone tried 220 or 218 peak temp but at lo
Electronics Forum | Thu Oct 25 13:39:29 EDT 2012 | cyber_wolf
Wait a minute...Your peak temps are PbFree like. Why is your profiler looking at time above 183 ? What is the time above 217 ? I thought we were looking at time above 217 not 183.
Electronics Forum | Wed Jan 11 18:10:26 EST 2012 | davef
New Webinar on Laser Depaneling SMTA Webinars On February 9th, Josh Brown of LPKF Laser & Electronics will walk you through the advantages and disadvantages of laser depaneling in comparison to more traditional methods of depaneling such as routing,
Electronics Forum | Wed May 02 12:59:21 EDT 2012 | davef
I like AJ's answer. Count-On-Tools makes a neat holder for presenting short strips of taped SMT components to a placement head. http://www.smtnet.com/company/index.cfm?fuseaction=view_company&company_id=51639 Let us add to this by saying, we don't
Electronics Forum | Mon May 21 15:39:49 EDT 2012 | davef
This paper seems to take a balanced view as an approach to assessing xray machines http://www.focalspot.com/swf/WP-Price-Performance-Value.swf Let us add to this by saying, we don't work for the company referenced above, don't own stock in the comp
Electronics Forum | Tue May 02 15:29:14 EDT 2000 | M. F. Roe
I am looking for public papers or articles on intermetallic formation as a function of reflow profile. Most solder paste vendors specify peak temperature and time above liquidus, but I am particularly interested in what happens to intermetallic grow
