Talk:Andrey Nartov

Lathe invention(s)
This needs clarification and sourcing. He appears to have invented a form of gear-driven cross-slide that could be used for ornamental turning (i.e. in Holtzapffel's distinction of the term, as opposed to simple turning). This was used for the production of guilloché work (still a Russian favourite), specifically for medallions.

None of his innovations seem to have been relevant to engineering or screwcutting work. Nor did his lathe have a compound top slide (i.e. adjustable for angle).

Nor was this machine a duplicating lathe. It could make multiple identical pieces, but each one was made according to the setup, not copied from some master template.

If I have time tonight, I'll check Holtzapffel. Andy Dingley (talk) 14:33, 17 February 2010 (UTC)

>None of his innovations seem to have been relevant to engineering or screwcutting work.


 * Wrong. To make things clear: in Russia Nartov is considered an inventor of support. Support is a Russian term for the device depicted here. I am not very strong in the English lathe terminology, but it seems to describe the same thing as a mechanic carriage supporting a cutting tool. Specifically, the article in the Russian Wikipedia and one of the references describe Nartov invention as follows:


 * Нартов разработал конструкцию первого в мире токарно-винторезного станка с механизированным суппортом и набором сменных зубчатых колёс (1738).
 * Nartov developed the construction of the world's first screwcutting lathe with a mechanic support and a set of changable gears (1738).
 * Obviously, the lathe carriage appeared long before, but a mechanic carriage close to the modern type came to existence in the 18th century, and Nartov's mechanic carriage is the earliest reported, at least from what I have seen so far.

>Nor did his lathe have a compound top slide (i.e. adjustable for angle).
 * As seen from other Nartov's inventions, he wouldn't have problem with changing angles, and apparently "the set of changable gears" was used exactly for changing angles. But of course I don't know it for sure. Where from have you got your information about the details of Nartov's lathe?


 * The machine called "copying lathe" by Russian sources was a different type of lathe produced around 1717. It was indeed used to copy medallions and other artwork. Greyhood (talk) 17:18, 17 February 2010 (UTC)
 * Nor was this machine a duplicating lathe. It could make multiple identical pieces, but each one was made according to the setup, not copied from some master template - wrong. The book Nartov and his Theatrum Machinarium (ref added to article) has a diagram and description from which it is clearly seen that Nartov's copying lathe indeed copied from a template to a blank (in scale; the pattern was larger to provide for fine detail). A probe traced the template and the cutter did the cutting accordingly. Of course one can write "according to the setup", but the setup was just the insertion of the template. - Altenmann >talk 17:58, 6 August 2023 (UTC)

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