On 13 January 2016 at 16:09, Rick Lair <r...@superiorroll.com> wrote:
> I have never dealt with stepper motors/drives and one of the guys at our > shop is kicking around converting and old 9x30 Southbend lathe to cnc > using Linuxcnc My Chinese 9x30 is OK on the X with a 2.5Nm stepepr but a bit weak on the Z with a 3.5Nm stepper. If I was converting a lathe using steppers (and I am not, I am converting using servos) then I think I would be looking at the new-fangled closed-loop steppers. For Z probably: http://www.ebay.com/itm/121787201520 And something a bit shorter in the hope if tucking it back underneath the saddle for X http://www.ebay.com/itm/111796968667 That is just an indication of what I am talking about, not in any way a recommendation of manufacturer or supplier. Squeezing a ball-nut into the X axis is often difficult. It is also possibly unnecessary. If there is one place where backlash compensation stands a good chance of working it is the X-axis of a lathe. it is never much of a problem with a manual lathe, is it? I don't think I have ever made a lathe cut where the X axis cutting force changed direction. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=267308311&iu=/4140 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
