I could have sworn that the 2uS was 2000ns.. but my calculator/ conversion utility told me otherwise - must have hit a wrong button..
I'm guessing that the 60ipm is going to be just fine. I don't think I have the spindle RPM to keep up with even that. Michael On Dec 7, 2009, at 10:03 AM, Hubert Bahr wrote: > Michael > 2us is 2000 ns not 200. The sum of 2000 step+2000 space =4000ns or 4 > usec period is consistent with a maximum pulse rate of 250,000 per > sec. > I believe that is also a stated spec. I use the G540 with a parallel > port connection and I am limited by the 40000 pulses per sec that is > the > maximum my computer puts out. This limits the top speed depending on > the gear ratio or lead screw etc. The G540 requires 10 pulses to > move a > stepping motor 1 position. Most steppers are 200 steps per revolution > so it takes 2000 pulses to rotate the motor 1 revolution so my > computer > limits me to 20 revolutions /sec or 1200 rpm. To move faster you > either > need a hardware pulse generator such as the Mesa cards to turn the > motor > faster or lower gear ratio's. However some motors are limited by > their > inductance to lower than 1200 rpm. When I built my machine they > didn't > have the G540 for an option so I don't know where the 1000 ns setting > came from but 2000 is what I used for mine as well. > > Hubert > > Michael Jones wrote: >> I think I found a/the solution for slow speed issues on my G540 and >> EMC. The system now works smoothly (at least as far as I tested) >> about 2ipm to 60ipm. >> >> I'm not sure if it's just my machine, my system or me (I've >> contributed to my own share of difficulties).. but .. Setting the >> Step >> Space and Duration to 2000 did the trick. The latency on my system >> is >> around 12000.. I'm not sure if this is a contributing factor. The >> Gecko documentation says that the timing should be 2uS (200 ns) >> >> I tried both selecting the G540 in the pulldown menu for the >> controller in the Stepconf wizard as well as loading the >> G540.stepconf >> file both contained the same 1000 ns setting for the step timing and >> neither option worked *for my system* with either an inverted step >> signal or non-inverted. >> >> I still need to adjust the trim pots but first I need to finish the >> rest of the build. >> >> Thanks for the help. >> >> Michael >> >> ------------------------------------------------------------------------------ >> Join us December 9, 2009 for the Red Hat Virtual Experience, >> a free event focused on virtualization and cloud computing. >> Attend in-depth sessions from your desk. Your couch. Anywhere. >> http://p.sf.net/sfu/redhat-sfdev2dev >> _______________________________________________ >> Emc-users mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > > > ------------------------------------------------------------------------------ > Join us December 9, 2009 for the Red Hat Virtual Experience, > a free event focused on virtualization and cloud computing. > Attend in-depth sessions from your desk. Your couch. Anywhere. > http://p.sf.net/sfu/redhat-sfdev2dev > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Return on Information: Google Enterprise Search pays you back Get the facts. http://p.sf.net/sfu/google-dev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
