Are you referring to compound indexing or differential indexing? There is a big difference.
Compound indexing is an old method using two separate simple indexing movements to create an index movement of a specified amount. It is seldom used anymore because high number plates are easily found or made, allowing the necessary divisions to be created.
Differential indexing requires an indexing head that also has the change gears with it, known as a Universal Indexing Head. It cannot be done with a rotary table or with a semi-universal indexing head. The gears are set up so that the number plate is also rotated a certain amount as the indexing is done. It is complicated, and is beyond what I can do with my rotary table, thus I have not learned how to do it.
Okay. Compound indexing it is!
It can be done, but it is a bit complex as well. I have never done it, but can see where it might be useful. Here is a link to where you can find the information you seek: http://babel.hathitrust.org/cgi/pt?id=mdp.39015002958927;view=1up;seq=79
Okay. Compound indexing it is!
It can be done, but it is a bit complex as well. I have never done it, but can see where it might be useful. Here is a link to where you can find the information you seek: http://babel.hathitrust.org/cgi/pt?id=mdp.39015002958927;view=1up;seq=79
That link made me go cross eyed when I tried to read it :nuts: It's definitely a "bit complex"
I think I'd find a buddy with a cnc to make a new 127 hole plate. You could make a new plate with a rotary table, it would be tedious, but could be done.
Mike
FYI Most CNC indexers only have accuracy of ± 20 sec a dividing head is less than ±0.1 sec on a cheap one.
Dave