CAD CAM EDM DRO - Yahoo Group Archive

Re: Why is the push to such high step rates (Grex and Arc100)?

Posted by lcdpublishing
on 2006-12-18 12:41:58 UTC
Thanks for piping in Patrick.

I can understand the desire for a smooth pulse stream and certainly
can appreciate the effects of a bad pulse stream on steppers, but
does that have any effect with servo driven systems?

Also, do you know of any applications that would use such a high
frequency for the pulse stream? I am obsessing about that
specification - sorry.

I just think about the industrial CNC machines I am familiar with
(which also transcends into robotics). 4000 IPM at .0001"
resolution is the fastest I have seen and that was on a FANUC ROBO
Drill machine (basically a 3 axis machining center for drilling).
At 4000 IPM and .0001" resolution, works out to about 660,000 SPS.
It's just mind boggling to watch something move that fast.

Chris




>
> It is not only a matter of how high a pulse rate a device can
produce.
> It is also how much jitter the pulse train has. While a PC may be
able
> to reach 45KHZ. The pusle train can have severe jitter if you try
to
> go just a bit higher and that causes difficulty in building systems
> that push the PC's limits and run in production environments even
at
> bellow 100KHZ.
>
> Having a stable pulse train allows running the same
motor/driver/load
> combo at higher pulse frequencies without missed steps or stalls
in
> long production runs. That also applies to hobby use if you make a
> part that takes days of machine use like it often happens when
using
> software such as DeskProto for example.
>
> That is where products such as te ARCNC100 come in. And once you
have
> solved the jitter issue, it doesn't cost any more to make it go up
to
> 4 MHZ or even 20 MHZ for that matter. Any solution that solves the
> jitter issue involves hardware and for hardware, 4 MHZ or 20 MHZ is
> pretty much the same ball park.
>
> Patrick Robin
>

Discussion Thread

lcdpublishing 2006-12-18 07:09:10 UTC Why is the push to such high step rates (Grex and Arc100)? Mariss Freimanis 2006-12-18 08:30:26 UTC Re: Why is the push to such high step rates (Grex and Arc100)? turbulatordude 2006-12-18 09:00:14 UTC Re: Why is the push to such high step rates (Grex and Arc100)? lcdpublishing 2006-12-18 09:13:32 UTC Re: Why is the push to such high step rates (Grex and Arc100)? turbulatordude 2006-12-18 10:14:19 UTC Re: Why is the push to such high step rates (Grex and Arc100)? caudlet 2006-12-18 10:31:11 UTC Re: Why is the push to such high step rates (Grex and Arc100)? lcdpublishing 2006-12-18 11:06:01 UTC Re: Why is the push to such high step rates (Grex and Arc100)? Mariss Freimanis 2006-12-18 11:20:22 UTC Re: Why is the push to such high step rates (Grex and Arc100)? lcdpublishing 2006-12-18 11:45:42 UTC Re: Why is the push to such high step rates (Grex and Arc100)? Fred Smith 2006-12-18 11:45:55 UTC Re: Why is the push to such high step rates (Grex and Arc100)? C.S. Mo 2006-12-18 12:14:34 UTC Re: [CAD_CAM_EDM_DRO] Re: Why is the push to such high step rates (Grex and Arc100)? atelierrobin 2006-12-18 12:22:02 UTC Re: Why is the push to such high step rates (Grex and Arc100)? lcdpublishing 2006-12-18 12:32:27 UTC Re: Why is the push to such high step rates (Grex and Arc100)? Leslie Newell 2006-12-18 12:39:43 UTC Re: [CAD_CAM_EDM_DRO] Re: Why is the push to such high step rates (Grex and Arc100)? lcdpublishing 2006-12-18 12:41:58 UTC Re: Why is the push to such high step rates (Grex and Arc100)? lcdpublishing 2006-12-18 12:53:38 UTC Re: Why is the push to such high step rates (Grex and Arc100)? atelierrobin 2006-12-18 12:58:12 UTC Re: Why is the push to such high step rates (Grex and Arc100)? Mark Vaughan 2006-12-18 13:05:57 UTC RE: [CAD_CAM_EDM_DRO] Re: Why is the push to such high step rates (Grex and Arc100)? lcdpublishing 2006-12-18 13:08:38 UTC Re: Why is the push to such high step rates (Grex and Arc100)? John Dammeyer 2006-12-18 14:20:46 UTC RE: [CAD_CAM_EDM_DRO] Re: Why is the push to such high step rates (Grex and Arc100)? Tony Smith 2006-12-18 14:25:18 UTC RE: [CAD_CAM_EDM_DRO] Re: Why is the push to such high step rates (Grex and Arc100)? lcdpublishing 2006-12-18 14:33:30 UTC Re: Why is the push to such high step rates (Grex and Arc100)? Leslie Newell 2006-12-18 14:46:59 UTC Re: [CAD_CAM_EDM_DRO] Re: Why is the push to such high step rates (Grex and Arc100)? Leslie Newell 2006-12-18 14:48:02 UTC Re: [CAD_CAM_EDM_DRO] Re: Why is the push to such high step rates (Grex and Arc100)? Fred Smith 2006-12-18 15:01:55 UTC Re: Why is the push to such high step rates (Grex and Arc100)? John Dammeyer 2006-12-18 15:16:54 UTC RE: [CAD_CAM_EDM_DRO] Re: Why is the push to such high step rates (Grex and Arc100)? Jon Elson 2006-12-18 20:47:23 UTC Re: [CAD_CAM_EDM_DRO] Re: Why is the push to such high step rates (Grex and Arc100)? Jon Elson 2006-12-18 20:47:37 UTC Re: [CAD_CAM_EDM_DRO] Re: Why is the push to such high step rates (Grex and Arc100)? turbulatordude 2006-12-19 04:58:10 UTC Re: Why is the push to such high step rates (Grex and Arc100)? lcdpublishing 2006-12-19 05:15:37 UTC Re: Why is the push to such high step rates (Grex and Arc100)? lcdpublishing 2006-12-19 05:29:33 UTC Re: Why is the push to such high step rates (Grex and Arc100)? Jon Elson 2006-12-19 07:59:03 UTC Re: [CAD_CAM_EDM_DRO] Re: Why is the push to such high step rates (Grex and Arc100)? Graham Stabler 2006-12-19 08:38:12 UTC Re: Why is the push to such high step rates (Grex and Arc100)? lcdpublishing 2006-12-19 08:56:42 UTC Re: Why is the push to such high step rates (Grex and Arc100)? Graham Stabler 2006-12-19 09:46:05 UTC Re: Why is the push to such high step rates (Grex and Arc100)? optics22000 2006-12-19 10:27:16 UTC Re: Why is the push to such high step rates (Grex and Arc100)? John Dammeyer 2006-12-19 11:04:49 UTC CNCing a 7x12 minilathe Graham Stabler 2006-12-19 12:06:19 UTC Re: Why is the push to such high step rates (Grex and Arc100)? Peter Homann 2006-12-19 12:12:22 UTC Re: [CAD_CAM_EDM_DRO] CNCing a 7x12 minilathe John Dammeyer 2006-12-19 12:47:34 UTC RE: [CAD_CAM_EDM_DRO] CNCing a 7x12 minilathe David Bloomfield 2006-12-20 04:09:10 UTC Re: Why is the push to such high step rates (Grex and Arc100)?