I forgot to mention I think there’s a way to alter the startup defaults. According to the link below, editing "imperial_startup.ngc" can be set to your desired parameters, but if you have a reason to change the P value (like using a different value for roughing) it won’t return to that value.
See here: https://forum.linuxcnc.org/plasmac/37612-cut-path-not-following-gcode > On Jul 31, 2020, at 9:25 AM, Matthew Herd <herd.m...@gmail.com> wrote: > > I just ran into this issue (again). I did some searching and found that > LinuxCNC defaults to G64 with no P value specified as of a certain version > (2.7?). That caused some issues for me over the years, so I’d been manually > specifying either G61 (exact path mode) or specifying G64 P0.001 (or another > value). Then recently I’d forgotten to add it and I noticed some drilling > cycles were coming dangerously close to breaking the drill off in the part > with an X move. I came across this: > > https://forum.linuxcnc.org/fusion-360/36097-fusion-360-milling-post-with-g64-pn > > <https://forum.linuxcnc.org/fusion-360/36097-fusion-360-milling-post-with-g64-pn> > > I used his post and it seems to generate the necessary values. I edited the > post to default to P0.001. > > Matt > >> On Jul 31, 2020, at 9:05 AM, Thaddeus Waldner <thadw...@gmail.com >> <mailto:thadw...@gmail.com>> wrote: >> >> I’m using Fusion 360 in a workflow for engraving signs. This starts out as a >> .dxf file, which I import into a fusion 360 sketch, and then use the trace >> feature to generate tool paths. >> >> As an aside, if anyone has an idea for a simpler workflow (free, of course) >> and one that perhaps doesn’t involve Windows, Please suggest it here. I’ve >> tried DXF2GCODE and although it looks like it does all that I need, but I >> couldn’t get it to work reliably, as it kept skipping features. >> >> The post processes for EMC—as it’s called in Fusion 360—somehow calls for >> path blending and I cannot figure out where. Is path blending turned on by >> default, unless you specify exact mode? >> >> Here’s the preamble as generated by the post: >> >> % >> (ONOFFSWITCHESENGRAVE) >> (T1 D=0.25 CR=0. TAPER=30DEG - ZMIN=0. - CHAMFER MILL) >> N10 G90 G94 G17 G91.1 >> N15 G20 >> N20 G53 G0 Z0. >> (TRACE2) >> N25 T1 M6 >> N30 S3820 M3 >> N35 G54 >> N40 M8 >> N45 G0 X11.9375 Y0.9635 >> N50 G43 Z0.54 H1 >> N55 G0 Z0. >> >> I was able to fix this by adding the following line: >> N36 G64 P0.001 >> But I’d like to know how/why it as blending paths in the first place. >> >> >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net <mailto:Emc-users@lists.sourceforge.net> >> https://lists.sourceforge.net/lists/listinfo/emc-users > _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
