> On Feb 5, 2024, at 6:19 PM, gene heskett <ghesk...@shentel.net> wrote: > > On 2/5/24 18:26, John Dammeyer wrote: >> Thanks everyone. On the Unimat list there were a number of people really >> pushing the idea that Z+ was towards the chuck and it just didn't make >> sense. And as we all know, nowadays once can find an internet source that >> supports almost anything. >> Now if only the wand with the partridge feather core would arrive. I'm sure >> the site selling it was not a con job. > > That bit of humor John, reminds me a a msg I got from Ray Henry a day or so > ago. Said he wished he had known that a snow blower purchase was good at > warding off snow he would have bought one 20 years ago. He is in the UP and > has only had 1, 2" snowfall since buying a blower > If that really worked it might be worth it as we age. :-) I > I'm in WV and had 16" on the front deck about 2 weeks ago. Long gone now of > course. > >> John >>> -----Original Message----- >>> From: andrew beck [mailto:andrewbeck0...@gmail.com] >>> Sent: February 5, 2024 3:05 PM >>> To: Enhanced Machine Controller (EMC) >>> Subject: Re: [Emc-users] Axis direction >>> >>> 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 >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users > > Cheers, Gene Heskett, CET. > -- > "There are four boxes to be used in defense of liberty: > soap, ballot, jury, and ammo. Please use in that order." > -Ed Howdershelt (Author, 1940) > If we desire respect for the law, we must first make the law respectable. > - Louis D. Brandeis > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net <mailto:Emc-users@lists.sourceforge.net> > https://lists.sourceforge.net/lists/listinfo/emc-users
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