All the info I have gathered regarding mill conversions, lathe conversions, building a home CNC machine etc.. All describes controlling 3 or 4 axes using Mach 3 or similar software driving stepper motors and ball screws. I am really not finding answers about the detail on the spindle itself, which I would assume is the most important aspect of any machine. Videos on YouTube all demonstrate the steppers for x, y, and a axes, but nothing for the spindle.
initially I was of the impression that one could use a stepper motor for a spindle drive...although now I am no longer convinced.( I am talking for a milling machine or lathe specifically) engravers or routers is definitely not a consideration.
now I am trying to decide whether it is better to use a DC motor with controller or an AC motor with a VFD. If going for the AC option then does one still control the spindle speed with Mach 3 or manually on the VFD?
I have ordered a Nema34 stepper from China which I will use to try and drive a spindle with, but will change to AC with VFD if this is really unsuccessful. Once I have a spindle built I will carry on with the rest of the machine.
i guess I am going to build a machine around the spindle arrangement.
just waiting for the Chinese New Year to be over then hopefully I will get my first few goodies to start playing with.
i would appreciate comments on this....