Same here every machine I have used (12 years CNC machining). negative z is always towards the chuck.
Or on a mill brings the tool down to table. Or table up towards tool On Tue, 6 Feb 2024, 09:23 Sam Sokolik, <samco...@gmail.com> wrote: > Even the k&t with a discrete component 60's control had smaller numbers > towards the spindle... > > On Mon, Feb 5, 2024, 1:36 PM <marcus.bow...@visible.eclipse.co.uk> wrote: > > > > > John, > > > > Leaving aside right or left hand rules etc, leaning your head towards > > your left shoulder shows that the relationship between the spindle and > > the carriage is the same as on a vertical mill. > > To bring the spindle closer to the carriage is a move in the -Z > > direction. > > If the argument is about the tool position, with the work in the chuck, > > tilt your head to the right and you now have the tool on the right and > > the work on the left, like a mill with the tool above (on the right) and > > work in the chuck below (on the left0. Now the movement of the tool > > towards the work is still -Z. > > > > Marcus > > > > > > On 2024-02-05 18:01, John Dammeyer wrote: > > > There's been an interesting discussion on the Unimat users list about > > > axis direction. As usual someone can always find something on the web > > > that supports their opinion. > > > For example this one: > > > https://digit-chain.com/names-of-axes-in-cnc-machine/ > > > > > > However I disagree that movement towards the rotating axis, be it the > > > chuck on a lathe or the spinning cutter in a mill spindle, is a Z+ > > > direction. Doesn't even seem intuitive to me either. > > > > > > Now it's true that you can set the Z=0.00 position anywhere in the > > > G54... spaces depending on what you touch off on. And then a movement > > > toward the spindle could be positive. But in an G53 machine > > > coordinate space isn't a Z- direction towards the spinning tool or > > > part? > > > > > > That's the way I have my LCNC system and MACH system set up. Even my > > > ELS is negative towards the lathe chuck. > > > > > > John > > > > > > > > > > > > _______________________________________________ > > > 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 > > > > _______________________________________________ > 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
