Maybe this is the place to use an absolute encoder? Just an off the wall thought.
Dave On Fri, 2010-05-14 at 10:59 -0400, Cal Grandy wrote: > You might consider homing the head prior to energizing the high pressure > hoses. Only a sequence control. > > > ----- Original Message ----- > From: "Viesturs Lacis" <[email protected]> > To: "Enhanced Machine Controller (EMC)" <[email protected]> > Sent: Friday, May 14, 2010 7:35 > Subject: Re: [Emc-users] Homing of rotary axis > > > 2010/5/14 Andy Pugh <[email protected]>: > > On 14 May 2010 00:16, <[email protected]> wrote: > > > > > > > > (Ian, your idea would work fine too, but he asked to minimise the > > amount of movement that his hoses are subjected to) > > > > Yes, the essence is that I do not want the head to tilt those 50 > degrees (which is maximum tilt angle) every time i turn on the > machine, because it puts a lot of stress to high-pressure tubing > (water pressure reaches ~4000 bar). > > Ian, thank You for a suggestion on playing with HOME_OFFSET value for > fine-tuning the home position. I find that in some cases it might be > easier than adjusting the home switch itself. > > > I think it need be nothing more complex than a semi-circular metal disc on > > the rear shaft > > extension of the motor and an optical slot detector. > > Yes, it seems like a pretty simple setup to me too, Thank You for an idea! > > Viesturs > > ------------------------------------------------------------------------------ > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > > > ------------------------------------------------------------------------------ > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
