On Sunday, March 25, 2012 08:31:23 PM Kirk Wallace did opine: > On Sun, 2012-03-25 at 18:31 -0400, gene heskett wrote: > > On Sunday, March 25, 2012 06:18:24 PM Gary Corlew did opine: > > > My limit switches are at the ends of the travel farthest away from > > > the chuck both axis(X & Z) I have no clue what s/b means, to set up > > > your tools I set mine up to the end of the part you are going to > > > machine after I face it off a little then take a cut on the od and > > > set your tool to that > > > > Thanks Gary. As for s/b, its short hand for "should be". I think I > > have a printed copy of this link already, in a 3 ring binder out in > > the shop, just need to locate it. Too many 3 ring binders on the > > shelf now... > > > > > This link should explain how to set up your lathe tools > > > http://linuxcnc.org/docs/html/lathe_lathe-user.html > > > > > > > > > -----Original Message---- > > > From: gene heskett [mailto:ghesk...@wdtv.com] > > > Sent: Sunday, March 25, 2012 10:47 AM > > > To: emc-users@lists.sourceforge.net > > > Subject: Re: [Emc-users] Tool change question > > > > > > On Sunday, March 25, 2012 10:29:31 AM Mark Wendt (Contractor) did opine: > > > > > Silly Q about lathe mode. Can somebody load > > > > > examples/lathe_pawn.ngc into their machine & see if its upside > > > > > down and reversed left right on your display. Here it shows > > > > > the pawn's radius above the centerline, and the large diameter > > > > > bottom on the right. And will not of course run unless I edit > > > > > the ini and let it go inches or feet negative in both > > > > > directions. > > > > > > > > > > Cheers, Gene > > My HNC lathe home switches were set at Hardinge, but seem to be set at > the location that is safest for the turret to rotate for a tool change > and is also accessible by the operator for mounting new tools to the > turret. I use G28 as a move to home for every tool change because it is > sort of a brain dead place to do it. It may waste a little time but I > like the extra small margin of safety. Nowadays, there are a half dozen > ways or more to handle tool changes so G28 may not be appropriate any > more. Of course, the limit switches are just before the hard stops, and > the soft limits just before the limit switches. > > I have my mill set up the same way, in other words, set to a good place > to make tool changes and is easy for the operator to get at the spindle > and either side of the table (for workpiece setups on either side), so X > homes in the middle, Y close to the negative end, or closest to the > operator, and Z at the top, which is needed for the automatic draw bar. > G28 is used here too. I don't have limit or home switches yet, but soft > limits are close to the hard stops when the home is set properly at > start up. Being a stepper, everything gets messed up if a stepper > stalls, but this hasn't happened yet. > > I loaded lathe_pawn.ngc into a sim lathe configuration and it looks like > a normal front tooled lathe layout with the tool on the operator side of > the workpiece axis and the spindle to the left holding the pawn base. > Maybe there is a setting in your .ini file that is mirroring the axes? > How does the physical tool run with your setup? In other words, does the > screen tool and real tool move the same way?
Real tools aren't hooked up yet, waiting on enough stuff to make a parport cable, and I'm just starting on wiring up the interface card. Visually in axis, they move what I would call correct, X+ moves right, Y+ moves up from the bottom, as if moving in toward center. ATM I need to get the two driver packages bolted down, along with the fan, and then I can get serious about the interface card, at the instant, its in the way of doing much else. And I see I'll need to bring the power supplies for the card and fan out to a terminal strip, moving a wire attached to the LM317T's is bending the output lead, so I'll have to get that bolted down before I start seriously wrestling with the cards wiring. I did get that window fitted, but it won't be fastened in till the card is all wired up. Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> What foods these morsels be! ------------------------------------------------------------------------------ This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
