CAD CAM EDM DRO - Yahoo Group Archive

Re: [CAD_CAM_EDM_DRO] A crazy idea

Posted by Doug Harrison
on 2002-06-06 07:45:28 UTC
Mariss;

This seems like a great idea, but I'm confused about the first bit. It
appears that you would be using three separate states - on, off and
floating. How else would the driver know the difference between the first
zero and no bit at all?

Please explain a little more for those of us who are digitally impaired.

Doug

----- Original Message -----
From: mariss92705 <mariss92705@...>

> Parallel port output CNC programs are limited to 3 or 4 axies because
> of the limited number of port bits. Each axis requires a STEP and
> DIRECTION bit pair. What if it could be done with a single bit per
> axis where STEP and DIRECTION were combined on the same line? It then
> would be possible to run 6 to 8 axies.
>
> Here's how it could be done:
>
> (1) 100000000010000000001000... is CW
> (2) 011111111101111111110111... is CCW
>
> In (1), a narrow positive going pulse would be interpreted as a CW
> motion. In (2), a narrow negative going pulse would result in CCW
> motion at the same speed. One would simply invert (1) to generate (2).

Discussion Thread

mariss92705 2002-06-06 07:21:50 UTC A crazy idea bjammin@i... 2002-06-06 07:31:46 UTC Re: [CAD_CAM_EDM_DRO] A crazy idea stephen_stallings 2002-06-06 07:39:51 UTC Re: A crazy idea Doug Harrison 2002-06-06 07:45:28 UTC Re: [CAD_CAM_EDM_DRO] A crazy idea mariss92705 2002-06-06 08:05:44 UTC Re: A crazy idea mariss92705 2002-06-06 08:33:15 UTC Re: A crazy idea stephen_stallings 2002-06-06 08:43:39 UTC Re: A crazy idea mariss92705 2002-06-06 09:10:54 UTC Re: A crazy idea waynegramlich 2002-06-06 11:00:45 UTC Re: A crazy idea Vajk Fekete 2002-06-06 11:52:29 UTC Re: [CAD_CAM_EDM_DRO] Re: A crazy idea Larry Edington 2002-06-06 12:04:02 UTC Re: [CAD_CAM_EDM_DRO] Re: A crazy idea Alan Marconett KM6VV 2002-06-06 13:18:06 UTC Re: [CAD_CAM_EDM_DRO] A crazy idea mariss92705 2002-06-06 14:08:19 UTC Re: A crazy idea Carl Mikkelsen, Oasis 2002-06-06 14:48:07 UTC Re: [CAD_CAM_EDM_DRO] A crazy idea JanRwl@A... 2002-06-06 16:50:44 UTC Re: [CAD_CAM_EDM_DRO] A crazy idea Carol & Jerry Jankura 2002-06-06 20:32:40 UTC Where do we go from here, was [CAD_CAM_EDM_DRO] Re: A crazy idea bsptrades 2002-06-07 00:46:23 UTC Where do we go from here, was [CAD_CAM_EDM_DRO] Re: A crazy idea bjammin@i... 2002-06-07 04:23:24 UTC Re: [CAD_CAM_EDM_DRO] Re: A crazy idea turbulatordude 2002-06-07 05:15:04 UTC Where do we go from here, was [CAD_CAM_EDM_DRO] Re: A crazy idea bjammin@i... 2002-06-07 05:27:26 UTC A crazy idea Carol & Jerry Jankura 2002-06-07 19:54:37 UTC RE: Where do we go from here, was [CAD_CAM_EDM_DRO] Re: A crazy idea