Electronics Forum | Sat Mar 24 00:50:24 EST 2001 | PeteC
Fresh paste from a factory sealed container. Should paste be scrapped out altogether if left on the stencil for too long (length-of-time?)? Our paste is Multicore CR39. Multicore reccomended the print chamber be around 22C @ 50%-60% RH. Our plant is
Electronics Forum | Wed Mar 27 08:07:42 EST 2002 | caldon
Ovation Products (devision of Airline Hydraulics) makes a fixture just for Screen printing and PNP machines. This product is called grid lock. It's tooling that is air actuated and conforms to the bottom side of your PCB with gentle (gentle enough no
Electronics Forum | Mon Jul 08 11:53:40 EDT 2002 | yngwie
Hi Guys, We prints solder paste on via hole as the holes are used as the test points. This is a clean process. In normal production, upon completion of a primary side, board will proceed to secondary process immediately. The problem happened when
Electronics Forum | Mon Mar 07 11:26:29 EST 2005 | mrduckmann2000
Pete, I was speaking to the Electrovert/Speedline/Camalot/Gemini factory tech's and App Eng's. I now have new machine files which slowed the pumps down to half speed, I have several needles....all of which still will not place a small enough dot.
Electronics Forum | Mon Aug 14 14:27:00 EDT 2017 | emeto
Here is some food for thought. Try to answer these questions yourself and I am sure you will see huge improvement. Reasons: - Bad PCB design - Plating-uneven HASL cause more than OSP Au/Ni or Silver - Poor paste and print quality - uneven paste ca
Electronics Forum | Fri Feb 01 02:32:31 EST 2019 | robl
It's nice to be able to do things in house, and it's good to have somewhere without commercial pressures to learn and make mistakes, so I can understand where you are trying to go. Those machines look a little lightweight for consistent quality pr
Electronics Forum | Thu Jul 20 13:32:11 EDT 2023 | spoiltforchoice
I doubt either Mycronic or Essemtec, as the only people who do dispense printing, will want to share their research with you. But clearly they will have followed every valid option to determine what is possible. Time & pressure is not used for anythi
Electronics Forum | Tue Apr 20 17:56:42 EDT 1999 | Chrys Shea
| | I am wondering if anyone has any info regarding solder paste misprint clean-up procedures for Entek Plus CU-106A PCB's utilizing a water-clean solder paste. In a implementation procedure they recommend a 2-3 minute wash cycle with the following
Electronics Forum | Sat Apr 25 19:40:01 EDT 1998 | Stan Traxler
| We have to mount our SMD devices 0.1 to 0.4 mm off the pcb | PCb substrate to compensate for thermal stressing in a | Space enviroment. Has any one any ideas or contacts for | dissolvable pads. this only applies to leadless components We have appl
Electronics Forum | Fri Mar 12 19:09:21 EST 1999 | Jess Baker
Manufacturers who have to mark barcodes onto PCB's without secondary application of pressure sensitive labels can etch it on, screen it on, inkjet it on, use laser marking, or a combination of those. Using a laser marker to write a code into a label
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