Electronics Forum | Thu Feb 15 14:51:39 EST 2007 | nitro
We have five 1997 DEK 265LTs, and we have never had to have the stencil house blacken any fiducials. The fiducials are etched about halfway through the stencil. You can adjust the lighting in each individual program, not just a global lighting change
Electronics Forum | Fri Mar 02 00:21:38 EST 2007 | AMS
Hello, I havea 0.4mm pitch TQFP with heat transfer pad on the bottom side of component. I will appreciate any suggestions with regards to: 1) stencil thickness (Rest of components on board are 0603 passives and few 40 mil pitch IC's) 2) Stencil
Electronics Forum | Sat Mar 31 08:22:42 EDT 2007 | davef
Are you observing stencil design rules with regard to aspect and area ratios? For more: * IPC-7525 - Stencil Design Guidelines * A previous discussion http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=24848 * Other postings on stencil ratio
Electronics Forum | Thu Mar 29 09:10:46 EDT 2007 | chrissieneale
Who out there uses a mini stencil to paste some paste when they replace a BGA and who uses just flux? What are the benefits or both and more importantly - how many times can you do both on the same component / board? Thanks in advance! Chrissie
Electronics Forum | Thu May 03 01:07:18 EDT 2007 | pavel_murtishev
Good morning, Worth system for 0.5mm or more pitch paste printing. For less pitch (uBGA, 0.4mm etc) framed stencil are preferred due to better tensioning. Main issue with them is handling. Stencil apertures that are used for tensioning might be easi
Electronics Forum | Thu Sep 20 07:26:42 EDT 2007 | davef
Jimmy So, it sounds like your stencil and board are made to dissimilar versions. Choices are: * Buy new stencil to match the pads on the board * Tweek position of stencil to better match-up with the pads on board, ignoring the fiducials. You may be a
Electronics Forum | Fri Jan 18 11:20:11 EST 2008 | mulder0990
I was wondering if anyone knew of any good portable stencil solutions. I am looking for a rolling cabinet that can house 20 stencils without a huge footprint. I also need the cart/cabinet to be closed off(doors or otherwise) so customers do not see
Electronics Forum | Tue Jun 17 09:24:43 EDT 2008 | rgduval
Could it be from a dirty stencil, rather than from the pick and place operation? We've seen a number of occurences recently with solder balls near some of our fine pitch components...we eventually diagnosed as dirty stencils...excess solder on the b
Electronics Forum | Mon Jul 28 13:16:47 EDT 2008 | realchunks
Be careful of just reducing your aps. Too much can cause tombstoning if your print is slightly off or your placement isn't right on. Also be careful of the "pac-man" type of ap - it can lean to asty cuts if you wipe off your stencils by hand. Do
Electronics Forum | Tue Sep 16 10:51:09 EDT 2008 | rayjr1491
Here is the scenario: We are using Lead Free Type III paste. We are using 5 Mil EFORM stencils The part we are having issues with is a SOT883. Stencil design is the SMALL PADs are 10x16mil Large PAD 14 x 24 mil. We are getting some see-sawing of th
