Chris Epicier wrote: >Jeff > >I read your post with great interest. For me, it gave some very good insight. >Like you, I do not have a repeatable tool length. I was wondering if I could >get a kind of switch doing my touching off of the z-axis. The idea is as >follows: > >- I have a parallel port based 3 axis mill driven by emc2 2.3.3 (soon 2.3.4) >- I have a vacuum table, that is well enough even (I remill the surface when >the wear plate needs to be replaced) >- x and y are also repeatably within reference distance from home position >- If I would add a small metal plate (say alu) into my vac table (could veven >be on an spring mount), connect it to a wire, I could close an electric >circuit when the tool touches that plate. If I was able to stop z-motion based >on the closed electrical curcuit (we talk about say dc 4-6V) immediately, I >would not have to jog to the position each time. This saves considerable time >for me and sounds much more reliable to me as manual jogging. > >How would I be able to implement this? > > Take a look at the tool-length-probe.ngc file in your nc_files directory. It shows a method that can be used to probe lengths after tool changes (or whenever you want really). You just call a subroutine to do the offsetting.
This method does not change Z, it changes the tool length offset. - Steve ------------------------------------------------------------------------------ Come build with us! The BlackBerry(R) Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9 - 12, 2009. Register now! http://p.sf.net/sfu/devconference _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
