How autopen works? - Router Forums
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post #1 of 3 (permalink) Old 03-08-2016, 06:56 AM Thread Starter
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Default How autopen works?

I know everything is about cams.
But how the head is constructed?
Autopen Model 60 - The Autopen Company
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post #2 of 3 (permalink) Old 03-08-2016, 10:40 AM
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That's a really old autopen. Did you know that Jefferson used one a lot. The cam is the heart of the idea. There is a corresponding "recorder" that has the same arm mechanism but is driven "backwards". The writer holds the pen and writes while a recording wheel is turned and the cam shape is written on the wheel. The cam is then constructed from that. Newer autopens (like from the 1930s) used groves like a vinyl record. Of course today, it's just an image that is printed and there are companies that will make fonts out of a person's handwriting.

Measure twice, cut once and CROSS OUT THE WRONG MARKS.

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post #3 of 3 (permalink) Old 03-08-2016, 02:19 PM Thread Starter
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I want make one from plywood.
I know almost everything...
I dont know mechanic principles about pantograph head.
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