On Fri, 27 Jul 2012, Bryce Johnson wrote: > Date: Fri, 27 Jul 2012 14:12:49 -0500 > From: Bryce Johnson <[email protected]> > Reply-To: "Enhanced Machine Controller (EMC)" > <[email protected]> > To: "Enhanced Machine Controller (EMC)" <[email protected]> > Subject: [Emc-users] One more question on the G540 and 5i25? > > One other thing I was having an issue with was the G540 step settings. > > I previously had g251s for the steppers (which are the same thing that is > inside the G540). I used the step rate from the pncconf of: > > DIRSETUP = 200 > DIRHOLD = 200 > STEPLEN = 1000 > STEPSPACE = 2000 > > For some reason I was missing steps and it would refuse to function at low > speeds (like 5 ipm). I boosted the steplen to 2000 and that solved my > problem. Anyone have any idea why that is?
Different polarity or different interface drive voltage may affect this as this is close to the OPTO coupler speed limits. Also using the _minimum_ value is probably asking for trouble as theres no margin. even 5000 ns step space and steplen would not hurt anything. It would limit you to 100 KHz but on a 10 uStep Gecko this is 3000 RPM, = out of the normal range of step motors Peter Wallace Mesa Electronics ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
