My opinion only: it is very hard to govern a small engine like Onan CCK with mechanical fuel supply, to achieve perfect speed regulation in the face of varying loads that are close to its rated power.
There is a fundamental delay between any control system change and the change in the amount of fuel burning in the cylinders. This alone makes any tight regulation hard to achieve. If you have an electric servo motor, you can instantly vary supply of electricity to it. With a fuel burning motor, there is always a delay between change in control and amount of fuel available. A very large (and dangerous) flywheel may help. If you want encoder type feedback, just add a little rubber idler wheel to an encoder and get a reading off of the alternator belt. i On Thu, Feb 3, 2011 at 10:31 PM, Kirk Wallace <[email protected]>wrote: > On Thu, 2011-02-03 at 12:50 -0800, Kirk Wallace wrote: > > On Thu, 2011-02-03 at 14:34 -0500, Don Stanley wrote: > > > Hi All; > > > I am attempting to configure EMC2 10.04.06 to control RPM > > > on a 60 HZ AC generator. > > > > I am hoping to control my Onan with EMC2 someday: > > http://www.wallacecompany.com/machine_shop/Onan_5CCK/ > > > > Oops, I completely missed the point of the question. > > I think this should work: > > http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Closed_Loop_Spindle_Speed_Control > > except you will need a sensor for your AC, as you had planned, to feed > into the software encoder phase A. A diode bridge could give you 120Hz. > Then the encoder velocity output will go into a PID feedback input. The > PRM command will go into the PID command input. The PID output will give > you the value to feed to the throttle actuator (stepgen, pwmgen). > -- > Kirk Wallace > http://www.wallacecompany.com/machine_shop/ > http://www.wallacecompany.com/E45/index.html > California, USA > > > > ------------------------------------------------------------------------------ > The modern datacenter depends on network connectivity to access resources > and provide services. The best practices for maximizing a physical server's > connectivity to a physical network are well understood - see how these > rules translate into the virtual world? > http://p.sf.net/sfu/oracle-sfdevnlfb > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ The modern datacenter depends on network connectivity to access resources and provide services. The best practices for maximizing a physical server's connectivity to a physical network are well understood - see how these rules translate into the virtual world? http://p.sf.net/sfu/oracle-sfdevnlfb _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
