Electronics Forum: bottom (Page 162 of 232)

Reducing Wave solder DeltaT

Electronics Forum | Wed Jan 27 11:58:35 EST 2010 | randyw

Our products are a mixed technology; with both surface mount components solder side and through-hole top side, in addition to massive heat sink assemblies. We have been using your SN100C solder in our wave solder process with Multicore MFR301 Flux si

BGA Voids

Electronics Forum | Wed May 19 17:43:25 EDT 2010 | pforister

Hello, I'm having problems with voiding on an assembly that has a GPS hybrid with balls much like a BGA. This is a RoHS assembly using no-clean solder (Kester EM907). The voids are at or above 25%. I use an 8 zone oven where I peak in zone 7 and

Wave soldering of PTH components with pitch 1.27mm

Electronics Forum | Thu Jul 08 09:29:10 EDT 2010 | mb_mfg

There are several things that can be done. Shortening the lead length should eliminate bridging between lead. We had done a project several years ago where the customer had shortened the leads to almost flush to the board, preventing any chance of

SOT-223 Flux trapped under part and lifting off pads

Electronics Forum | Wed Sep 29 08:26:03 EDT 2010 | babe7362000

We are Currently running a Board and it seems that the SOT-223's on the bottom side have flux and water trapped under the part. Nothing has changed in our process and this is the only board that it is happening on. We are using Kester R562 water wa

Mirtec programming discussion

Electronics Forum | Wed Jan 19 12:54:17 EST 2011 | bdamico

Hello Mark, The centroid data you are currently using to program the MV-2HTL may be used with either platform. However, the libraries cannot be shared due differences in camera resolution. The MV-2HTL will have a 1.3 megapixel camera versus the 2 m

HOT AIR Bench top

Electronics Forum | Mon Jan 17 21:14:19 EST 2011 | hegemon

Of the machines you have mentioned, the APE Bandit is your best bet. I had one of those in a previous employ and it was basically bulletproof, and simple enough to work on if things went wrong. Simple controllers and enough power to do the job at r

Assembly/Stuffing Issues

Electronics Forum | Fri Jan 14 19:25:52 EST 2011 | sonofptolemy

Hello, I am coming here for some insight and advice. I currently have high volumes (around 40K-50K) PCB's being stuffed at a local stuffing house. We are growing and lately have been putting in more orders with them. The problem is the stuffing qua

Bottom Termination Parts-Xray Inspection Criteria

Electronics Forum | Fri Mar 04 18:28:21 EST 2011 | hegemon

First, I would inspect for lack of solder bridges from the center slug to the outside leads. I would then look for evidence that the solder paste has reflowed beneath the component, without leaving too much void percentage. Typically we allow up

Excessive solder balls!

Electronics Forum | Fri Jul 08 09:30:35 EDT 2011 | kahrpr

Check that your pick and place machine is not pushing the part too far in the paste and squeezing the paste off the pad. Your profile could need modifying. In the case of the profile the solder paste can slump off the pads before turning into a liqui

Faulty CPU Board - Can it be Repaired

Electronics Forum | Fri Aug 12 08:13:12 EDT 2011 | rway

The only thing I see that might be a fuse is the green vertical axial leaded component next to the third from the bottom white 4-pin header. It's labeled ?718 or 710. I don't know if this is a resistor or a pico fuse. You can try to ohm it out. An


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