Peter, Thanks, But is it even going to be worth the effort? Since I'm sure the regular minimum pulse length signal is still going to at least work albeit with some possible theoretical performance limitations. I may not even require step rates beyond where this is a non-issue?
I've asked the drive manufacturer. See if they get back to me. Todd Zuercher P. Graham Dunn Inc. 630 Henry Street Dalton, Ohio 44618 Phone: (330)828-2105ext. 2031 -----Original Message----- From: Peter Wallace <p...@mesanet.com> Sent: Wednesday, October 25, 2023 10:36 AM To: Enhanced Machine Controller (EMC) <emc-users@lists.sourceforge.net> Subject: Re: [Emc-users] Mesa Step Pulses? [EXTERNAL EMAIL] Be sure links are safe. On Wed, 25 Oct 2023, Todd Zuercher wrote: > Date: Wed, 25 Oct 2023 12:22:40 +0000 > From: Todd Zuercher <to...@pgrahamdunn.com> > Reply-To: "Enhanced Machine Controller (EMC)" > <emc-users@lists.sourceforge.net> > To: "Enhanced Machine Controller (EMC)" > <emc-users@lists.sourceforge.net> > Subject: [Emc-users] Mesa Step Pulses? > > Hello, > > It is my understanding that the step pulses generated by Mesa cards > are always the minimum pulse length set by for example > hm2_5i25.0.stepgen.00.steplen, only the space between the pulses is > varied by the step rate, is that correct? > > I was reading the manual for the new drive I was planning to use in my > next build and see that the drive calls a preference of a 50% duty > cycle for step pulse inputs. I am guessing that it may have something > to do with how the drive's pulse filtering system works, such that for > maximum noise filtering and step reliability having the pulse length > be approximately equal to the step spacing gives the best results. > > So my questions are; Would it be possible to make a Mesa card output > a 50% duty cycle step pattern instead of the current default pattern? > And would doing this even be worth the effort? Its possible with a minor firmware change and LinuxCNC driver change to enable the mode. > > Todd Zuercher > P. Graham Dunn > Inc.<https://nam04.safelinks.protection.outlook.com/?url=http%3A%2F%2F > http://www.pgrahamdunn.com/%2Findex.php&data=05%7C01%7Ctoddz%40pgrahamdunn.com > %7Ce5da628e16d4477d2d4008dbd567e82f%7C5758544c573f47cebee96c3e0806fb43 > %7C0%7C0%7C638338414483169698%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAw > MDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sda > ta=Zwbdv69ESSXKwXR%2FvXYbyijq1wOtyar%2FYeCMJAr6fgg%3D&reserved=0> > 630 Henry Street > Dalton, Ohio 44618 > Phone: (330)828-2105ext. 2031 > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://list/ > s.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=05%7C01%7Ctoddz% > 40pgrahamdunn.com%7Ce5da628e16d4477d2d4008dbd567e82f%7C5758544c573f47c > ebee96c3e0806fb43%7C0%7C0%7C638338414483169698%7CUnknown%7CTWFpbGZsb3d > 8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C > 3000%7C%7C%7C&sdata=f1ssQLGo0gn0%2B2tjHAUXLZOjfsSHNrJWTjJDkkDRuAA%3D&r > eserved=0 > Peter Wallace Mesa Electronics _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
