Electronics Forum | Wed Nov 21 08:45:33 EST 2007 | davef
Rob: You say, "We usually determine our run process based on the heaviest components, and propensity for falling off during the second reflow process. If there's only the one BGA on that side of the board, we'd tend to run that side first." We agree
Electronics Forum | Tue Nov 20 17:07:20 EST 2007 | kennyrebbe
I am looking for a new semi automatic Stencil printer, and reflow oven that is capable of doing double sided boards with BGA�s. We currently own a Manncorp 4500R stencil printer https://www.manncorp.com/4x00_stencil_printers/index.php?view=overview&a
Electronics Forum | Tue Nov 20 19:08:15 EST 2007 | Peter
Hello, I would like to ask for opinion on an epoxy application. We apply RTV to bond and secure 2 electronic devices on a PCB. But after noticing the RTV bond breaking off during vibration test, our customer has specs in a 5min 2-part epoxy (made
Electronics Forum | Tue Nov 27 20:19:12 EST 2007 | davef
Q1: How many mils the gap between the terminal and pad? A1: It depends on properties of the glue and z-force when the component is placed by the assembler. Q2: Your practice is for technology SMT-4? A2: We don't understand SMT4. We know that very sm
Electronics Forum | Tue Nov 27 08:47:24 EST 2007 | ratsalad
The letter below was dated December 13, 2006 from Kester's Senior Market Development Engineer. I guess since then they have moved production back to Mexico. We no longer use EM907 as our primary Pb-free paste so I haven't seen any containers in a w
Electronics Forum | Fri Dec 07 12:01:14 EST 2007 | elg1
The 3000 hours is correct. It was a VERY fast ROI! Back to the discussions on the earlier threads, some of this information is correct. If you exceed the design limitations for keep out requirements and your board tolerances vary, you can have twe
Electronics Forum | Wed Nov 28 22:33:24 EST 2007 | davef
There is no specification for lead-free HASL. You can use any lead-free solderability protection that meets your customer requirements. Use IPC-9701 �Performance Test Methods and Qualification Requirements for Surface Mount Solder Attachments� to ass
Electronics Forum | Thu Nov 29 15:52:53 EST 2007 | jmelson
Some other machines are a lot simpler. Here's how the Philips (mady by Yamaha) CSM84 works. Smaller tape (8 and 12 mm) feeders are all mechanical. A plunger on the head pushes a lever on the feeder at the same time the head comes down. First, the
Electronics Forum | Fri Nov 30 18:27:32 EST 2007 | jmelson
This doesn't help the original poster any, but does the Quad have any sensing of what is going on in the feeder? On the pneumatic or mechanical Philips feeders, if the tape jams in the feeder for some reason, the head just keeps tapping the lever an
Electronics Forum | Wed Dec 19 14:44:54 EST 2007 | Paul M.
Kelca..... I don't think yer getting the picture here. These boards are supplied by the customer. They are "Labor Only" accounts. We have NO control of the PCB's or any of the parts for that matter. These Labor Only customers show up at the back doo
