Motorized rotary table

[tonyfoale]

Opps, sorry for the confusion, Tony. I saw the partially drilled hub and thought you were indexing to drill the bolt circle. The teeth looked so good I thought you purchased a timing pulley that you were modifying. I didn't think you were cutting them. I should have known better! And since some motorcycles use a drive-belt-timing-pulley I wasn't thinking of a clutch hub even though your other pic clearly displayed that. Thought maybe you were developing two different improvements at the same time.

The video reminded me your ELS would be a good application if an indexing scheme was worked out for a manual lathe. Both of what I want to do eventually. ...

Well I guess that I have done what you are talking about. I have been converting my electronic lathe to do cam grinding but it was not straight forward to get my lathe spindle to turn with a variable speed over each revolution, and then there is the question of adding a very low resolution encoder to it. In the middle of the night it hit me. Replace the lathe headstock with the motorised rotab.

Click for full size

Here is a 3 minute unlisted video as a teaser before I find the time to document it all.

and with sparks
https://www.dropbox.com/scl/fi/pfswb...=emvk6j0b&dl=0

https://www.dropbox.com/scl/fi/4inw4...=6iv13kxa&dl=0