Electronics Forum | Thu Aug 30 15:38:09 EDT 2001 | allie
I need a good chuck, new or used, for a QUAD 100 pick and place. The chuck size is 00-001XG. The one I have has worn fingers, bushings, and leaks air around the nozzle. How difficult are these to rebuild properly? I would appreciate hearing from a
Electronics Forum | Sat Sep 01 18:14:39 EDT 2001 | Dreamsniper
your glue volume measurement is dictated by your stencil aperture size and thickness when you use stencil printing. Why you need to measure your glue volume deposition? I don't think that this is the right way yet for your undefined problem. What's t
Electronics Forum | Mon Oct 08 02:12:21 EDT 2001 | george
I do not doubt about the power of the 552 and 580, but in some cases it may be overdone. For just a simple (straight forward) shear test, you can also look at: http://www.chatillon.com/products/dpp.html (�Low Capacity Mechanical Force Gauge. These er
Electronics Forum | Fri Aug 31 08:44:35 EDT 2001 | karkanov
Hi, For the production we use a Topaz from Philips, But we must always go on the machine to place the board correctly, like the position on the cad file and the one we see on the board is not good enought to start the production right away, do you
Electronics Forum | Fri Sep 07 08:57:28 EDT 2001 | Hussman
Por, You talking wave solder or reflow solder? At wave, nitrogen is the way to go. Just like you stated, it does affect the surface tension. If you're reflowing, I wouldn't go nitrogen unless you have to. Improper stencil design is usually the c
Electronics Forum | Sun Sep 09 10:53:05 EDT 2001 | bentzen
For reflow soldering, you are correct ! The higher surface tension of the solder paste in nitrogen atmosphere can increase the number of solder bridges if the component or solder paste print is inaccurate. Another defect that might increase is tomb
Electronics Forum | Tue Sep 04 11:09:25 EDT 2001 | blnorman
As the others have stated, moisture is the killer. You have to be sure no moisture is allowed to get to the paste. If it does, you'll get solderballs. I would suggest not using a vacuum. The solvents and other volatile components of the flux will
Electronics Forum | Wed Sep 26 14:58:46 EDT 2001 | bobm
i have stored boards in the refrigerator in side a tray (with a lid) for 2 days and still had them reflow with no problems. i don't know if i would go any longer than that. i would not put any qfp's or any other device that is moisture sensative dev
Electronics Forum | Tue Sep 04 07:34:02 EDT 2001 | Shvetang Dewashrayee
We have problems of solder shorts while using DEK Infinity printers. Some of the manufacturing lines are configured ina way that the side (bottomside) of PCBs mostly with passive parts is screened first and then the otherside (topside) of the PCBs w
Electronics Forum | Tue Sep 04 09:19:51 EDT 2001 | jhingtgen
Shvetang, From your post it is difficult to say why the shorts are occuring and in what area of the board. I offer my assistance to solving your issue, I am an Applications Eng with DEK USA. Please contact me via e-mail at jhingtgen@dek.com or phon
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