Re: [CAD_CAM_EDM_DRO] CNC of lathe

On 10/08/2011 01:04 PM, ebiz_59 wrote:

> I've salvaged a wood lathe and an old Craftsman lathe. I'm thinking about venturing into making one or both CNC. I get the need for bed feed and crossfeed steppers, as seen in several kits online, but don't I need some sort of tach/encoder on the spindle too? thanks C

Yes, but it is not unusual to see a 1 ppt (yes, 1 pulse per turn)
encoder on the spindle. Using 1PPT means you get a free index and can
interpolate other indices. That relies on a solid spindle drive. For a
good servo spindle, a many PPT encoder is desirable. For turning ONLY
operations, no encoder is needed.

Dave 8{)

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