Electronics Forum | Wed Sep 12 22:57:02 EDT 2007 | lito_visaya
Anyone, We are an electronic assembly contractor and one of our customer requires a 100% solder coverage on pads for their products. We are using flex pcb and we mount only one component (LED for backlight application). The solder paste we are u
Electronics Forum | Thu Dec 16 16:31:21 EST 2010 | swag
We build flex circuits by the 1000's. The fiducial quality has been trouble from day 1 and our machines don't always like to read them. We have worked out some of the kinks thru our PCB supplier but still have problems. Our PNP machines do fairly
Electronics Forum | Thu Oct 26 13:56:08 EDT 2000 | ptvianc
Hello: Pre-baking laminates should only be performed:(1) to meet contractual agreements or (2) in response to an actual defect that can be traced to PWB water absortion. Besides the fact that a pre-bake is an enormous process "bottleneck," it also
Electronics Forum | Fri Oct 03 08:58:22 EDT 2003 | SMT Process
Folks, I use both UP1500 and AccuFlex. The basis for this machine was bought from SMTech several years ago as the SMTech 500. They sold off the last few SMTech machines with the MPM name on them (stupid move because they sucked), but then quickly r
Electronics Forum | Thu Jun 26 10:03:36 EDT 2003 | swagner
We have been processing a 3 and 5 up flex array for nearly four years on pallets and have had a pretty steep learning curve. Make sure you have vacuum holes in your pallet for the screen printing process, also work with your support block vendor to
Electronics Forum | Thu Apr 29 16:58:00 EDT 2004 | pjc
You should be able to get a one-print Mylar frame for the SMTech 90 machine from SigmaPrint, http://www.sigmaprint.co.uk Yes, with vision you store images of two features such as solder lands or fidicial marks from opposite corners of the board. With
Electronics Forum | Wed Sep 19 14:58:03 EDT 2001 | jschake
You provided excellent detail, and unfortunately I do not see anything out of the ordinary except the tooling issue. This brings us back to the original tooling related questions you had asked before. My apologies for questioning your process integ
Electronics Forum | Tue Jan 13 19:16:03 EST 2004 | pjc
Dedicated tooling uses what MPM calls an "H" tower. You mount the board support plate (dedicated tooling) on top of the H tower. If boards are only single-sided SMT, meaning only components on one side, the board support plate is flat with vacuum hol
Electronics Forum | Thu Jul 27 12:20:33 EDT 2006 | David
Hello all, We have customer who wants to produce boards 0.4 mm thick. But they have not allowed to put into the panel. Board has not regular shape so without pallet it is not possible to produce. I made pallet where is pocket the same shape as boar
Electronics Forum | Tue Aug 29 10:36:09 EDT 2006 | Chunks
With the UP2000 that has vacuum board hold down, the Grid Loc hoses defeat the vacuum in order for them to exit the work table. Big boards require more girds, thus more hoses. Set-up between large and small boards takes time to remove or add the gr
