On Oct 15, 2011, at 3:53 AM, Viesturs Lācis wrote: > 2011/10/15 Tom Easterday <tom-...@bgp.nu>: >> When we run above 2000ipm we have significant following error >> >> Could our Mesa cards be doing something wrong? > > 2000 ipm = 50m/min and for me that is really fast. > Are You sure that stepgens on Mesa card are capable to produce steps > at such a high frequency to keep up with the required speed? > What are the scale and steplen and stepspace parameters? > My guess is that they cannot do that and that is why stepgens fall > behind the commanded position.
The 7i43 card is a 50MHz card, but we have a 7i42 card in front of that which claims to limit bandwidth to 10Mhz. 10MHz is quiet fast, could it really be a problem? We currently have the parameters set to: # these are in nanoseconds DIRSETUP = 200 DIRHOLD = 200 STEPLEN = 200 STEPSPACE = 200 Though I believe we had the problem when we were using values for the Geckos (before switching to Granite Drives) of: DIRSETUP = 200 DIRHOLD = 200 STEPLEN = 3500 STEPSPACE = 500 -Tom ------------------------------------------------------------------------------ All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity and more. Splunk takes this data and makes sense of it. Business sense. IT sense. Common sense. http://p.sf.net/sfu/splunk-d2d-oct _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
