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
