2013/6/11 Charles Steinkuehler <char...@steinkuehler.net> > > > If you can't think of anything to help with: > > * A "LinuxCNC 101" that reviews the basics of LinuxCNC targeted at > users who have no machining background. For example current 3D > printer software has no concept of different coordinate spaces, so > homing, touch-off, and similar are very confusing in LinuxCNC until > you realize what's going on under the hood. If something like this > exists already, please send me a link! >
I guess that User manual is closest to what You might want to see: http://linuxcnc.org/docs/LinuxCNC_User_Manual.pdf No homing _and_ touch-off? What if the stepper motor is turned, when power is off, how does it recover from this lost position? * LinuxCNC ini/hal configuration tweaks that make LinuxCNC easier to > use for the targeted audience. For instance, when I first started > using LinuxCNC, I got lots of errors like "You can't do that when not > homed". On the typical 3D firmware, you just start it up and start > moving around. I think there are ways to configure LinuxCNC to be > more like that, but I'm not sure exactly how. > And how do You set the starting point, if there is no homing or touch-off? I have read that calibrating the printer takes some time, which IMHO automagically requires machine coordinate system to be fixed against the base surface on which the printing is done. You can avoid this "home all joints before doing any meaningful" with NO_FORCE_HOMING setting in INI file. There also is POSITION_FILE option, which would save all the joint positions on program exit: http://linuxcnc.org/docs/html/config/ini_config.html#sub:TRAJ-section But I still do not understand, how do these stepper-driven 3D printers do without homing or at least touch-off. Stepper motors tend to move a up to a full step back or forth, when the power is applied, so there would be some position error acumulated over time. -- Viesturs If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
