Re: Delta B3 servo and Ethercat communication
If a machine / system has been developed with a component (e.g B2 servo) then often it is easiest to continue to use that component.
Any change of component requires work as the component is different (even if quite similar) and may require other changes in the machine / system, or at the very least validation.
For hobby use, if price similar, most of us buy the latest / greatest.
B3 has multiple improvements over B2. Delta outlines these quite clearly. Do they really matter for a hobby machine? Probably not, as a B2 servo is not a limitng factor for our hobby machines.
7xCNC.com - CNC info for the minilathe (7x10, 7x12, 7x14, 7x16)