Re: [CAD_CAM_EDM_DRO] Re: PWM vs Constant current and G-rex

----- Original Message -----
From: "Mariss Freimanis" <mariss92705@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Tuesday, October 25, 2005 4:11 PM
Subject: [CAD_CAM_EDM_DRO] Re: PWM vs Constant current and G-rex


> The G-Rex will be a little bit more than just that.
>
> 1) Run 6 independent axis or, run 3 independent X,Y axis or, run 2
> independent X,Y,Z axis or, etc. Mix and match.
>
> 2) Constant contouring 2D, 3D thru 6D.
>
> 3) Roll your own CNC software. Anyone with Notepad and a USB port can
> operate it.:-) The communication is ASCII text string. Send:
>
> x123y456z789<cr>
>
> The X,Y,Z axis move in true 3D to the X=123, Y=456 and Z=789
> coordinates. As soon as motion starts, the G-Rex replies with:
>
> xyz<cr>
>
> This means the last XYZ motion is executing, send data for the next
> XYZ coordinates. Send more data and it constant contours. Don't send
> any, it comes to a stop. Send more and it picks up from where it left
> off.
>
> Or, send a megabyte text file containing 100,000 concatenated line
> segments; 2D, 3D, or even 6D. The G-Rex will give you a constant
> contoured path for those 100,000 vector segments automatically. Make
> it 10-million if you like and have the time. It can handle 800 XYZ
> line-segment coordinates per second.
>
> How fast? The first named axis' programmed velocity is the constant
> contour velocity. It and aceleration is set by sending:
>
> Vx1234<cr> or Vy12<cr> or etc.
> Ax567<cr>
>
> Send x123y789<cr> and the CC speed will be Vx (Vx = 1234)
> Send y789x123<cr> and the CC speed will be Vy. Both take XY to the
> same coordinates.
>
> A lot more stuff as well; this is just a little of the motion stuff.
>
> Mariss
>
> P.S. Running steppers PID closed-loop improves them a little. How
> about zero to 3,000 RPM in 180 degrees (1/2 rev)? One revolution
> start to stop in 0.04 seconds.
>
>
>
>
>
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, R Rogers <rogersmach@y...>
> wrote:
> >
> > /// A stepper motor with an encoder is essentially an AC servo with
> very poor high speed torque. For the same price as a servo. This
> quest for the unstallable stepper escapes me totally. Seems if the
> stepper is in an application that is causing it to malfunction then
> it would need to be replaced by a more reliable servo system. ///
> >
> >
>
> >
> >
> > //// With Mach3, The pulse rate frequency can be set as high as
> 45k/sec. This is ample for any system unless someone is wanting to
> use some ridiculous amount of encoder count resolution that no mill
> or router table could take advantage of. ///
> >
>
>
>
>
>
>
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