On Apr 9, 2012, at 3:40 PM, Andy Pugh wrote: > On 9 Apr 2012, at 11:20, Jeshua Lacock <jes...@3dtopo.com> wrote: > >> I have two wires from my power source connected to the Geckos, two wires >> from the geckos to power the motor, the common wire, 5v and ground for the >> encoder, then encoder A/B going to the Gecko, and step/dir coming from the >> parallel port. > > I think the missing information here is that you are probably using a > step-dir servo drive rather than open-loop steppers or servos with LinuxCNC > closing the loop. > If that is the case, then I am not sure that there is any need to connect the > encoders to the PCI card.
Thanks Andy. I guess the problem is I don't know all the terminology. Yes, I guess that is correct. I assume the 'open-loop steppers or servos with LinuxCNC closing the loop' is the best setup? For instance, that would allow the fastest control, and double as a DRO when the power to the drives are off, correct? In which case, I don't mind rewiring the encoders. I just want whatever is best. > I _think_ that the G540 firmware for the 5i25 emulates the 8(?) ground pins > in a parport, which seems to waste some potentially useful IO. This matters > less with a second header for the other 25 pins which I think are GPIO in > that config. > > If the G320(?) has an f-error output then using that achieves much the same > result as wiring the encoders back to LinuxCNC. I think you lost me again. :D Best, Jeshua Lacock Founder/Engineer 3DTOPO Incorporated <http://3DTOPO.com> Phone: 208.462.4171 ------------------------------------------------------------------------------ Better than sec? Nothing is better than sec when it comes to monitoring Big Data applications. Try Boundary one-second resolution app monitoring today. Free. http://p.sf.net/sfu/Boundary-dev2dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
