Larry Doe's MK4 Roll Scanner

At the AMICA Convention in Chicago July 2006, Larry Doe's MK4 roll scanner was unveiled to the public
for the first time. His roll scanner incorporates a significant breakthrough as it is capable of capturing printed matter
(lyrics, stop changes, etc.) simultaneous with capturing 100% of perforation data.
Following are some pics to illustrate its various features.

Larry Doe's MK4 scanner as in place in my roll scanning workstation.

Special thanks to Anthony Robinson in the UK for his development of software, unique to the MK4,
for the creation of the CIS files and the ability to display them in this manner. Very much appreciated.

Here is Larry Doe at his workbench assembling MK4 control panels. And Anthony Robinson enjoying a quiet moment in the UK.

The MK4 board illustrated is a modified MK3a board. Frank Thompson has developed a new nicely designed MK4 board. I understand several copies of this board are currently available, price unknown at this time. I am very comfortable with this scanner, having successfully scanned some Ampico, 88n and 65n rolls. Upon receipt of specially designed right source chuck, I will scan several hundred Skinner pipe organ rolls that are 10 1/8" wide paper with pin ends. These Skinner rolls are loaded with printed instructions for pipe organ console operation. Without this new MK4 scanner developed by Larry Doe, scanning these rolls would be an execise in futility. What Larry has achieved is a significant milestone in the evolutionary development of music roll scanners for which he is to be commended.

This visible hardware development is not complete without software development, unique to the MK4, by Anthony Robinson. He and Larry colaborated in the development of the circuitry, and then Anthony developed the software. The result is a smooth scrolling display of the roll and its printed information. An additional feature that has emerged is a very high tolerance when scanning highly translucent rolls. I recently scanned such a roll and was delighted with the ease with which I was able to acquire a perfect CIS file. Anthony is to be equally commended for his equal contribution to this project of archival preservation of the content of aging music rolls.

Much more can be learned about the history of this development by visiting Larry Doe's personal blog:

Much more can be learned about construction details of this scanner by visiting Larry Doe's personal web site:

And Anthony Robinson's suite of CIS utilities can be found at:

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