On Saturday, February 04, 2012 05:38:00 AM andy pugh did opine: > On 4 February 2012 09:25, gene heskett <[email protected]> wrote: > > Since I made the top side of a board look pretty good, but got stymied > > by linuxcnc's refusal to do a move to tool change from .1 to Z6.0 > > when it had 8.5" of room > > I have got myself into that sort of tangle by touching-off into the > tool table when I wanted to change the coordinate system, and > vice-versa. > > What was your tool-length showing as?
I haven't used the touch off but 2 or 3 times, there seems no obvious way to remove it when you want to clear it. My tool.tbl doesn't have lengths in most entries since all I have is a drill chuck and M2 collets in various sizes, so lengths are meaningless anyway. If that is the problem then I'll clear out the lengths in the whole table as some of that hasn't been touched by an editor except to add new tools. Where do I look for that, in the machine status pull down? I just went thru the tool table with the mo6 tn till I ran out of tool table, and at no point did the tool offset 4 item line near the bottom of that screen show anything but 0.000000 for all 4 numbers shown. But I also made sure since doing that just now to zero the xyz columns in my tool table and resave it. The xy columns were blank anyway, but one tool managed to have a 5 in the z column and it has been loaded before. Now they are all zero'd. In MDI mode, the active list isn't copy/paste able. These programs all have that list of usual preset suspects as shown in the user manual, starting with G17 and ending with G94 and the only position modifiers are G92 for both X and Z, cleared at the end of each tool use and reset after the new z=0 has been found. I use the G92 X to offset the mirrored bottom of the board that pcb-gcode puts out by negating the X values so that the top of the board s/b in registration with the bottom when it has been turned over in the pallet. Even that is canceled prior to going to the tool change position by a G92.1, then restored before moving back to 0,0,0.1 to resume the programs normal flow once my autoz functions have found the tool tip and set the z to 0.0000 with the G92Z#to effect a quick and dirty way to trim carving depth by a few 10 thousandths. There is a difference in the effective length of the spindle of around 5" between having the engraving bit in an 1/8" M2 collet, and having the collet replaced with a different drawbolt and an M2 shanked drill chuck for odd drill sizes. Humm, since the default powerup is no tool, or tool 0, should I put this nominal extra length when a tool other than 0 is mounted in the tool table for all tools? Common sense says that would exacerbate the problem. Call me puzzled. Thanks Andy. 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 color is a chameleon on a mirror? ------------------------------------------------------------------------------ Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
