On Sun, 21 Aug 2011, Bryce Johnson wrote:
> Date: Sun, 21 Aug 2011 12:27:07 -0500
> From: Bryce Johnson <sie...@gmail.com>
> Reply-To: "Enhanced Machine Controller (EMC)"
> <emc-users@lists.sourceforge.net>
> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net>
> Subject: Re: [Emc-users] Trouble with gantry setup
>
> So I got a max speed of 480ipm. 1909.9 steps per inch with the 10x
> microstep. 152789Hz is 65448nS per step. I was pretty close to that with
> my first base period. I've since brought the latency down to so I'll give
> that a try to see if it helps.
so 480 IPM is 8 IPS
8 IPS x 1909.9 Steps/inch = 15279.2 Hz = 65548 nS
So you need at least a 32274 nS period unless you use the stepgen in reset
mode
As Gene mentioned you also need overhead space obove this to allow the control
loop to speed up the step rate somewhat above EMCs maximum if its behind.
Peter Wallace
Mesa Electronics
(\__/)
(='.'=) This is Bunny. Copy and paste bunny into your
(")_(") signature to help him gain world domination.
------------------------------------------------------------------------------
Get a FREE DOWNLOAD! and learn more about uberSVN rich system,
user administration capabilities and model configuration. Take
the hassle out of deploying and managing Subversion and the
tools developers use with it. http://p.sf.net/sfu/wandisco-d2d-2
_______________________________________________
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users
