Hi Gene, IIRC emc2 has a very nice probing routine that will do what you want and log the results. The problem, of course, is a decent probe. I would recommend trying to make a Renishaw type probe ... ie. 3 points in a triangle where the probe can lift off (disconnect) any single node to trigger contact. This will give you 3D which can be nice.
I'm thinking about making one from PVC but have not gotten around to it. (round toits are hard to chase down ;-) ). Make it with a screw in probe so you can make your own or buy one of the well dimensioned (and not cheap) sapphire ones. <http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Probing_With_EMC> I don't think there is any how-to to go with the above link. I think that all that is required is to connect to a pin that HAL exports. I'm certain there will be someone out there with more specific knowledge. Good luck and tell me how it goes as it will be awhile before I get to it. On the other side of things synergy has a routine that will define text and wrap it around a solid. This is way beyond my level of competence so I don't even know which level of synergy (2.5 D, 3D wire, parasolids) is needed to make it work. Just thought I'd mention it so you can drool. HTH Dave On Apr 24, 2007, at 5:59 PM, Gene Heskett wrote: > Greetings; > > Has anyone drawn up a probe of the sort one could mount in the > spindle collet, > hook up to emc so that when contact has been achieved, emc records the > location? > > And, assuming this has been done, has the scanner routine to do > this already > been written too? > > I'm thinking in terms of the engraving done on a bolt rifles floor > plate, or > trigger guard, so that if an interesting pattern could be scanned with > potrace, and then the z axis treatment added so as to carve, say > with a small > diamond burr moving at call me next week speeds, to a consistent > depth of > say .005", the pattern obtained with potrace, but on a curved > surface such as > the bottom of a trigger guard or floor plate. > > But I'd need to be able to probe the contour of the item, and do it > without > doing any preliminary damage to the blueing, which is not a very good > electrical contact surface. So I'm thinking in terms of a guided > needle > whose upper end can be set against a single button of a conductive > elastomer > keyboard switch, the effect of which would be rather like a > potentiometer as > the pressure increases, and we could trip and stop the z axis > descent when a > logic 0 was detected, record all 3 axis's positions, then reverse > the z > drive, move to the next position .005 away in the scan, and repeat. > > It seems like we ought to be able to do that if the contact > pressure sensor is > already a working item. > > Anybody care to share insights/drawings for such a beast/tool? > > -- > 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) > Nothing is finished until the paperwork is done. > > ---------------------------------------------------------------------- > --- > This SF.net email is sponsored by DB2 Express > Download DB2 Express C - the FREE version of DB2 express and take > control of your XML. No limits. Just data. Click to get it now. > http://sourceforge.net/powerbar/db2/ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
