Re: [CAD_CAM_EDM_DRO] DeskNC Windows version

Jerry,

YES! I have CY545's to play with. I have an RDF (Radio Direction
Finder) that I built using a stepper and a CY545. I was planning on
using up to 4 CY545's to drive 4 axis CNC, but unless all you want is
moves in a single axis at a time, it is difficult to get fine enough
rates between the axis to allow circular, linear or helical
interpolation, IMO. Nice parts!

Alan KM6VV


Carol & Jerry Jankura wrote:

>
> Has anyone looked into some of the stepper motor controller chips that used
> to be available. It's been several years now, but I've used a Cybernetics
> Microsystems chip that was a self contained stepper controller. You simply
> added the driver transistors. That was at least 10-15 years ago, so I'd bet
> that there are better chips out there today. It shouldn't be all that
> difficult to put a few of these on a board to drive your steppers.
>
> -- Carol & Jerry Jankura
> Strongsville, Ohio
> So many toys, so little time
>
> -----Original Message-----
> From: Larry Edington [mailto:ledington@...]
> Sent: Wednesday, April 18, 2001 7:13 PM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: Re: [CAD_CAM_EDM_DRO] DeskNC Windows version
>
> High speed I/O on the parallel port under Windows is not impossible. But it
> is difficult to do a lot of calculations, timing and pump the data out under
> Windows. The parallel port is just 3, 8 bit ports. You have hundreds of
> other 8 bit ports in your PC screaming along at very high speeds under
> Windows software control all the time.
>
> The best way I know of to do this in Windows is by using a .vxd ( or wdm or
> whatever it'll be called in the next versions of Windows ). The application
> program reads the G codes and calculates the step commands. These commands
> are handed off to the .vxd which runs at Ring 0 and has access to all ports
> of the system without the usual restrictions of Windows. The .vxd handles
> the timing and step / dir outputs.
>
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