can they prevent production of doubled dies?

From wexler's site:
"On October 1, 2009 I had the privilege of having a telephone conversation with George Shue, Senior Advisor in Manufacturing at the U.S. Mint. During this conversation the 2009-D Washington D.C. quarter with a major doubled die reverse came up. Mr. Shue noted that the Mint was aware of this doubled die error and how it occurred. This particular doubled die resulted when a hubbing press operator stopped one of the single-squeeze hubbing presses to realign the hub and die and then restarted the hubbing sequence. In the process a rotational misalignment of images resulted. Mr. Shue further noted that the Mint was able to reproduce the error in a test to see what caused the doubled image originally.

The conversation further revealed that the Mint was aware that even though it was contrary to policy, hubbing press operators were taking it upon themselves to sometimes stop the single-squeeze hubbing presses before the hubbing was completed to make adjustments, and then restarting the press to complete the hubbing. To prevent doubled dies like the major variety seen on the 2009-D Washington D.C. quarter from happening again, the Mint has installed “locks” on the hubbing presses. Now if a hubbing press operator stops the press before the hubbing is completed, they will be unable to restart the press until a supervisor comes to inspect everything to make sure that things are reset properly. The supervisor will then “unlock” the press so that the hubbing can be completed. So for now doubled dies continue to be produced despite Mint efforts to eliminate the die variety."
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It would appear that the single-squeeze isn't always singular. The result of starting, stopping, and restarting a "single" squeeze is effectively the same as the multi-squeeze process. Although it shouldn't happen, workers are only human and don't always follow procedure; hence post-1996 doubled dies. (Lastly, the mint began testing the single-squeeze in 1985. I'm looking into FOIA documents to determine if single squeeze coins were minted and released publicly between 85-96. Think Web Press banknotes 88-95.)

 

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Case closed? Seems very straightforward, logical, and reasonable to me. Anyone else?

 

THAT I do not have the answer for. I think it was explained in a different thread. you would have to find someone that knows how the dies are made today to answer that. I don't even want to speculate as I don't want to mislead you with bad knowledge. it's counter productive. but if you no one answers the questioni in this particular thread you could start another titled "how are modern doubled dies made" and it will catch the attention of the right person who can help.

 

as an after thought.... if you make a thread as I have suggested you should BEWARE. there are plenty here that will argue that modern doubled dies are NOT doubled dies! so be ready for those answers too