On Tuesday, January 24, 2012 05:55:14 PM Ed Nisley did opine: > On Tue, 2012-01-24 at 00:12 -0500, gene heskett wrote: > > Its doing all moves on the .bot. files > > in negative X from the reference point > > I'm pretty sure there's a checkbox along the way that reads "Mirror X > axis" to make that answer come out right without any further attention. > > The Eagle gerbv274x CAM file has a "mirror" option that might do exactly > what you need. Probably applies only to the bottom layer, though. > > [*fails to install pcb2gcode due to dependency hell*] > > The pcb2gcode man page seems to imply (in --mirror-absolute) that > backside mirroring normally takes place at the middle of the board. > > Perhaps you have one or more of: > - the Eagle origin at the wrong spot
left front corner of the board, so all dimensions on the top side are positive. Seemed sensible at the time. :) > - the backside Gerber file exported without mirroring > - the --mirror-absolute option set/unset > > I'd expect some option twiddling would solve the problem without resort > to G-Code hackage. After all, you're not the first person to mill the > backside of a PCB with this tool chain! Obviously not, in this case I tried a G92 X2.195 before the first move, that put the holes where they belong, and of course a G92.1 to restore it at the bottom of the file before the M2. > And you really need an automatic tool height probe switch... really you > do! How do you train pcb-gcode to use it? I'll put a gage with a pcb contact on top of it on the table close to the board, and from the known height of the gage, I'll just pull the quill handle down till the light comes on. Should be close enough for my girls anyway. To do it in gcode, I'll need to pull the driver box down and wire up the stuff I did have to hook up for the G38.2, which should work for that, if I can insert those few lines of code after the M6 T# command. Good idea in fact. I didn't do that when I built the new driver box. 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> I just forgot my whole philosophy of life!!! ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! 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-d2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
