On 29 March 2015 at 04:53, Scott Salrin <scott.sal...@gmail.com> wrote: > Here is a link to the code Probotix uses: > http://www.probotix.com/wiki/index.php/Automatic_Tool_Length_Sensor
Their approach to tool-length sensing is to replace the M6 tool change command with a call to a subroutine which probes the tool length and then issues the tool-change command. Basically it adds moves and a probe before and after the M6 command. In the newer versions of LinuxCNC you can re-define the behaviour of M6, so you can in fact leave your G-code using M6 for tool-change and the effect will actually be to call the 100.ngc subroutine. (The "M6" in the re-mapped subroutine is interpreted as a normal M6, the subroutine doesn't keep recursively calling itself) This would be the minimal remap described in section 5.6 here: http://www.linuxcnc.org/docs/html/remap/structure.html#_making_minimal_changes_to_the_built_in_codes_including_tt_m6_tt However, the Probotix post-processor for Vectric is set up to use the O100 CALL rather than M6, so if you are using that postprocessor things should work without the remap process. As for whether the tool-change macro will lead to frantic spinning of the A axis rather than X movement, that rather depends on how the 4th-axis work is configured. If it is an alternative machine config which has the A-axis stepper driven by the G-code X-word then I rather suspect that it would. But there are other ways that it might be done. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
