Quite possible. It's not easy to remove since it looks like there is a screw and washer on the top holding it in place and above that the rotary table and the X axis.
John > From: Todd Zuercher [mailto:[email protected]] > > Hopefully your lead screw nut isn't about shot. They often start to bind up > hard under load just before they are about to strip out > completely. > > Todd Zuercher > From: John Dammeyer <[email protected]> > > What's really odd is at the moment this same axis that used to be incredibly > reliable at 150 ipm with jogging now also has started to > fault at over 100 ipm until it has run at 40 to 60 a few times. Likely > tightening the gib up a tad hasn't exactly helped that either. > > The motor is supposed to be 1.2 Nm at 3000 RPM and I'm running 4:1. > https://www.automationtechnologiesinc.com/products-page/dc-servo-motor/nema34-1125ozin-dual-shaft-servo-motor > > However, it runs hotter than the other one and the resistance in the windings > is different. One of the two is the correct size motor. > The other one isn't. I put what I thought was the correct one to move the > heavier X and Y and rotary table. And it has 4:1 while the X > has 3:1. No troubles with the X. > > Running back and forth 6.5" with G-code and the backlash compensation matches > my Shumatech DRO. Once it no longer faults. > > The reality is I should just replace the ACME with ball screws and be done > with that issue as outlined in this description of updating > this type of mill. > https://www.cnczone.com/forums/vertical-mill-lathe-project-log/25895-cnc-forum-posts.html > > John > > > > -----Original Message----- > > From: andy pugh [mailto:[email protected]] > > Sent: June-03-21 10:42 AM > > To: Enhanced Machine Controller (EMC) > > Subject: Re: [Emc-users] Servo Motor Tuning. > > > > On Thu, 3 Jun 2021 at 04:46, John Dammeyer <[email protected]> wrote: > > > > > > I'm of the opinion that under load in one direction but not the other > > > the 0.0137" backlash is impacting the motion. > > > > Backlash will certainly make thingsw difficult, as in effect you are > > trying to tune two systems with one PID. There is the motor+leadscrew > > system, which has a very low inertia and a high frequency response, > > and the motor+ballscrew+moving axis system, which has far more inertia > > and a much lower frequency response. > > > > You _could_ try adding more deadband. > > > > > > -- > > 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 > > [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 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
