Re: Stepper on a spindle

Dave,

Sounds like it will work quite well. Can't wait to try it out. Thanks

Keith

--- In CAD_CAM_EDM_DRO@yahoogroups.com, David Speck <Dave@D...> wrote:
>
> Keith,
> The gecko would drive the motor in both circumstances. Consider it to
> be a power amplifier to convert logic signals to power levels to
> actually turn the motor.
>
> The inputs to the Gecko would change depending on the mode of
> application. When you are doing plain round turning, your Accel/decel
> circuit would provide pulses to the Gecko to turn the spindle motor
at a
> constant rate. When you are doing spiral turning, the control
pulses to
> the spindle motor come from Mach 3.
>
> On my lathe, running AH-Ha, I just call the rotational (spindle) axis
> the Y axis, and envision my parts as drawn on a cylinder of paper
> wrapped around the part, with the X-axis being the router carriage
> left-right traverse, and the Z-axis being the crossfeed depth of cut.
> This may not conform with some conventions, but it works for me. Of
> course, I wrote my own G-code generator program, so I don't have to
> conform to any one else's standard. I believe that the
"conventional" Y
> and Z axis assignments are different, but I'm not precisely sure how.
>
> Dave
>
> Keith Clark wrote:
>
> >Thanks for all the input on this question.
> >
> >What I really need it seems, is a spindle motor on the lathe with rpm
> >that can be controlled by Mach3 and then the ability to let the router
> >be the spindle and the lathe spindle become a 4th axis. Am I correct
> >in assuming that the wiring would have to be changed from an
> >independent rpm controller to a Gecko to drive it as a 4th axis?
> >
> >Thanks again,
> >
> >Keith Clark
> >
> >
>