> > If you set the stepgen.max_velocity accordingly this simply won't > happen. It will ramp up and down between commanded values inside the > limit that you set. >
Yep. Done that after LCNC told me the speed was too high. > If it goes high again on the way down to zero, it will just change > direction of counting. > That's what I imagined but wasn't sure. But I'm still worried that in those up and downs, the far away from perfect solution I'm implementing to drive these up and down signals (these really are meant to be driven by push buttons I presume, since there's no timing info in the manuals) starts to accumulate error ending up in anything but the desired speed. That's why resetting both the VFD and the stepgen counter between processes would warrant me that the speed is more than adequate. Since I'm going to work with constant spindle speed in wood I don't think a little variation could hurt. But if I don't reset both counters I suspect that I can end up with several tens of hertz of deviation in a short time. El lun, 17 oct 2022 a las 10:48, andy pugh (<bodge...@gmail.com>) escribió: > On Mon, 17 Oct 2022 at 14:37, Leonardo Marsaglia <ldmarsag...@gmail.com> > wrote: > > > I'm mostly worried that a change in the gcode process or may be a tool > > change happens so quickly that the stepgen will have no time to make it > to > > zero position when the next speed command starts. In that case I will > have > > less speed than the desired one. > > If you set the stepgen.max_velocity accordingly this simply won't > happen. It will ramp up and down between commanded values inside the > limit that you set. > > If it goes high again on the way down to zero, it will just change > direction of counting. > > -- > atp > "A motorcycle is a bicycle with a pandemonium attachment and is > designed for the especial use of mechanical geniuses, daredevils and > lunatics." > — George Fitch, Atlanta Constitution Newspaper, 1912 > > > _______________________________________________ > 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
