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Alan Cable
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President
ACE Production Technologies
Alan Cable, the principle owner of ACE production technologies Inc. has over 40 years experience in the electronics manufacturing arena. Alan's expertise is high production manufacturing automation, equipment design and process engineering. For the past 25 years Alan has focused specifically on soldering issues relating to component solderability, lead tinning and selective soldering, owning several companies with this focus.

Alan Cable has submitted responses to the following questions.
What Is Causing Connectors to Bow?
If the connector described does not warp when passed through a reflow oven this indicates the residual stresses within the ...
Selective Soldering Frame Causing Cold Solder Joints
Cold solder joints during the wave soldering process can be caused by several factors including non-optimized conveyor speed, too low ...
Copper Dissolution Rate
The phenomenon of copper dissolution has been present with conventional tin-lead (SnPb) solder but to a much lesser degree since ...
Gold Plating and Embrittlement
I would not agree that 50 microinches should not be a problem. Especially with Lead-Free. My guess is you are ...
Manual or Automated Assembly?
If hand soldering through hole components is the issue then I recommend looking into "selective soldering". There are low cost ...
Solder Balls During Selective Soldering
This is a 2 part answer Assuming that the balls were not present from soldering the first side the question ...
Trouble Soldering a PC104 Connector
This is an ideal connector for the selective soldering process. If you have a SS machine I suggest using a ...
Test for Flux Penetration
For selective soldering a simple method is to lay thermal print paper on the top side of the board (without ...
Mixed Technology - Which First
The conventional flow is to place and solder the TH components after SMT reflow. If the board is single side ...
Use of Nitrogen for Hand Soldering
Both of your requests are handled within the selective soldering process. All manufacturers utilize minimal flux for a no clean ...
Stencil Issue with PLCC Component
It is common to pre-tin the component leads to add solder. Pre-tinning will pave the way for a better intermetalic ...
Opens at BGA Component Corner Balls
Try laying a defective one on a granite inspection plate and check to see if it has a bow in ...
Solder Bridging Problem on Header Connector
There are many "tricks" to cure this issue. Where in the row is the bridge occurring and is it consistently ...
Wave Solder Pallets
I agree with Brian Kerr. The only "clean path" to proove no risk of contamination is to use seperate pallets. ...
Lead to Hole Ratio for Selective Soldering
The short answer is that the requirements are the same as a previous expert response on wave soldering (Recommended lead ...
No Clean or Water Soluble for QFN Components
This website from SMTNet is pretty informative on this subject. ...
Solder Fillet Peaks
It is difficult for an iron tip to get hardware hot enough to willingly accept solder. Selective soldering with a ...
Re-plating lead-free components for tin/lead assembly
Hot solder dip is the accepted process for replacing the tin termination with tin/lead. The process involves dipping the tin ...
Problems Hand Soldering 24 Layer Board
Assuming that the components are solderable the basic secrets lie in the flux chemistry and a controlled time/temp profile. Soldering ...
SN96 Solderability Issues
I would be suspicious of the condition of the connector pin surfaces. Perhaps, because of age the parts need to ...
SMT Component Lead Oxidation
Re-tinning by dipping into fairly aggressive flux then into molten solder is the positive method of removing oxide (and unwanted ...
Fine pitch through hole soldering
With a "hot N2 knife" following the mini selective solder wave, we have successfully soldered 3 row connectors with .5mm ...
Hand Soldering Alternative
The soldering is not the issue, it is locating and grooming of the wires. Usually this is done in a ...