Electronics Forum | Wed Jan 30 09:37:28 EST 2002 | clarkk
Does anyone out there have experience dispensing solder paste with a Universal GDM (4716AL) with positive displacement pumps? I'd like to hear any comments on the success or failure of the machine to dispense consistently, effect of temperature varia
Electronics Forum | Thu Aug 22 02:18:09 EDT 2002 | mjabure
Specify the nozzle size as 1.4 in both the nozzle allocation table and the PD, the nozzles will still pass center test as the size variation is still within tolerence.
Electronics Forum | Wed Aug 20 12:18:58 EDT 2003 | John S
That is the thought. I haven't been able to get the materials together yet to start printing anything. The time frame is very short though, so I'm trying to locate as many options as possible. We've seen as much as 0.025" TIR variation in the surf
Electronics Forum | Mon Jun 07 17:28:07 EDT 2004 | edatasys
LSP is 'Long Soak Profile'. See http://www.aimsolder.com/tds/NC_297DX_Sn62_&_Sn63_Solder_Paste.pdf Looks like a variation of the RSS, with you guessed it a longer soak.
Electronics Forum | Tue Jun 21 14:15:59 EDT 2005 | tds
I have a self contained fume filtration system (for sale)for reflow ovens that will maintain your desired cfm. What I have heard from customer's is that there will be variations in your profiles thus causing some defects.
Electronics Forum | Thu Feb 23 23:24:14 EST 2006 | KEN
Depends what is adjacent to the step. 1206 chips could reside closer than say a 16 mil fine pitch. Larger apertures are more forgiving to height variations than small apertures.
Electronics Forum | Wed Mar 15 09:01:11 EST 2006 | Vick
The lead was inspected for coplanarity and it's within the specification it's designed for and doesn't show any variation in terms of height as compared to it's adjacent lead that has good wetting
Electronics Forum | Tue Jun 20 06:47:53 EDT 2006 | Julien VITTU (STMicro)
hung copper balance is really critical in your case. in the same configuration we have specified less than 5% copper variation between top and bottom layer if you keep this rule, assembly will be ok, otherwise you will get a terrible warpage after
Electronics Forum | Mon Jul 10 14:40:41 EDT 2006 | Billy D
Dude - check the centering jaws as well. If they're off a bit it'll do this as well. Is it just mechanically centered parts, or optically centered parts also?
Electronics Forum | Tue Feb 20 20:07:33 EST 2007 | mdang
My machine TP9-2U have the same problem. I use the camera to walk through the program and it is off and not repeatable. I think the machine has backlash but I don't know how to tighten it up. Can you help??? Thanks, -Michael
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