I've found that with my Cowells dividing head, I need to clamp the spindle every time I take a cut to get good results (I'm making clock wheels) - there's a nut provided for exactly that purpose. I guess this is normal (it's a feature I've seen on other dividing heads and tables) - but it's the only dividing head I've ever used, so bear with me if I'm totally off with this.
I'm toying with the idea of doing the rotary indexing CNC style (a la Division master, for example) but I've noticed that there is no mention of spindle clamping in the user instructions or anywhere else that I've read.
Is the assumption that spindle clamping should not be necessary, and that I'm doing something amiss to need it, or is it just that it's so obvious that no-one thinks of mentioning it... ?
Enlightenment received with thanks,