Re: Threading of CNC!!

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "shankaihuang" <calkai@n...>
wrote:

> I would like to conver a 9x 12 lathe to CNC!!
> I am thinking to substitute the powerfeed leadscrew by ballscrew
> driven by stepper motor!! But if I would like to cut L/H or R/H
> thread, how can I do that without gears driven by spindle??
> Variable speed control lathe????
> Can it be controlled so accurately to cut thread or I still need

the

> gears????
>
> Could someone give me some principles???
>
> Many Thanks!!
> Tom

Tom,

TurboCNC from DAK Engineering ($20 shareware) will cut threads just
using an input from a spindle transducer to tell it how fast and in
what phase relationship the spindle is to your Z co-ordinate.

http://www.dakeng.com/turbo.html

Excellent software at a bargain price.

Andrew Mawson
Bromley, Kent, UK