Kinda a continuation of ...
http://www.talkshopbot.com/forum/show.cgi?tpc=33571&post=74265#POST74265
There are a lot of "home made" indexers floating around, but I'm always faced with the same problem...
How to keep a lathe chuck (SuperNova) tight on the drive axle when software wants to turn the material both clockwise and counter-clockwise. One direction will tighten the chuck, the other direction will try to loosen the chuck.
Sometimes just a slight "loosening" can ruin a project.
Set screws kinda work, but my indexer uses the 18:1 Geared PK296. In this picture the indexer is a Harbor Freight "lathe" without the motor with a Stepper Motor attached on the far left connected through a coupler. My chuck would go on the actual lathe spindle.
I'm thinking of mounting a chuck directly on the 1/2" stepper shaft... But how?
I could use the Teknatool SuperNov2 Blank Insert from woodcraft http://www.woodcraft.com/Product/200...nk-Insert.aspx
47921.jpg
But the big question is how to keep the insert from rotating on the shaft AND keep the chuck from rotating on the insert.
What do you guys recommend?
-- Pat
47922.jpg
47923.jpg