On Tue, 2025-06-17 at 23:53 -0500, Thomas J Powderly wrote: > Hello > > Can any GUI follow the ToolPoint? > > Like: moving camera to keep ToolPoint centered in view port? > > ( or some gcoe/mcode trick to refocus the view port to 'here') > > Thx TomP
Just attach your camera to the spindle or Z axis and you are done. Kind Regards. > > On 5/16/25 14:10, gene heskett wrote: > > On 5/16/25 11:32, Leonardo Marsaglia wrote: > > > Hi guys, hope you're doing well! > > > > > > I'm pretty much successfully using external offsets for some of > > > the > > > parts > > > we manufacture on the lathe. > > > > > > But today, while the spindle was turning doing an eccentric I got > > > a > > > following error at the moment I went from MDI to Manual control. > > > I'm > > > using > > > servo motors but with mesa stepgen in velocity mode with it's > > > internal PID. > > > I guess this is a configuration problem. > > > > Could also be hdwe. I, sevreral years ago, converted my Sheldon to > > be > > driven the then new 3phase closed loop stepper/servo's. Bare in > > mind > > also that my controller is not a wintel box, but is an rpi4b. The > > individual controller in these has a decoder that is fed from an > > encoder on the rear of the motor, putting the PID's in linuxcnc out > > of > > a job because the PID is in the controller, giving truly instant > > control, so my stepgens are driven directly from the trajectory > > planner and there is no feedback to linuxcnc. That change plus > > around > > 45 volts to the controller makes the motor control at least 2x > > faster > > than pure steppers. Because the error signal also instantly > > controls > > the motor current, feeding the motor no more than it takes to null > > the > > error, the motors run 70C cooler and the workpiece shows nothing > > but a > > mirror finish. > > > > I am now using this same motor tech several other places, and am > > slowly replacing the steppers with these stepper/servo's, including > > in > > my 3d printers. The printers run 10x faster than OOTB, with much > > improved accuracy. Loss of a step is totally historical, it just > > doesn't happen. Ever. If the error is that big, the motor current > > rises to move he motor to reduce the error. Hanpose drivers can > > work > > with up to 90 volts for nema 17 motors, pulling the motor into > > position in microseconds but that overdrive is so short. there is > > not > > any heating to dangerous levels. I made some rotary axis things I > > carve screws with, a 3NM motor driving a 5/1 worm, 500 revs output > > speed is 2500 revs on a nema 23 motor, 2 hours of runtime per hard > > maple screw, the motor is warm but not burn you hand hot. > > > > But a warning, only motors with optical encoders. the smaller > > "42C" > > motors have a hall effect encoder, which can be just as accurate > > when > > stopped but take far longer to do the AD conversions, so they only > > move AFTER that AD conversion is complete, rendering what should > > be > > slow smooth motions as sawtooth shaped motions and parts printed > > will > > have shingles superimposed on the finish. Trust me you do NOT want > > that. > > > > > I'm using LCNC PRE 2.8 version on this lathe because it works. > > > But I > > > suspect this is a config problem more than a bug. > > > > > > Thanks a lot! > > Check your feedback paths, velocity and position modes are > > conflicting > > critters. > > > _______________________________________________ > > > Emc-users mailing list > > > Emc-users@lists.sourceforge.net > > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > . > > > > Cheers, Gene Heskett, CET. > > _______________________________________________ > 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
