You want to mirror the g-code file. I'm wondering why. If you have g-code you likely also have the CAD model and can just flip the part over and create another g-code file.
But let's say you only have the g-code file. All you need to do to make a mirror image (reflected on the X axis) is to treat every (X,Y) point as a vector and multiply each by a matrix that looks like the one below 1, 0 0, -1 That's it. This is actually a round about way to say "flip the sign of every Y value in your file It the line of symmetry looks different, perhaps it is a 30 degree angle then the above four number change. If you forgot Linear Algebra or never took the class Khan Academy has a very good intro level course free on-line. He assumes yu know only 8th grade algabra and if yo've forgotten that he covers it also in another free online class. On Sat, Mar 10, 2018 at 4:23 PM, Gregg Eshelman via Emc-users <emc-users@lists.sourceforge.net> wrote: > I've been trying to find a program or online converter that can take a > non-symmetric G-Code and mirror image it to cut the opposite shape while > still running around it clockwise. There is one for Windows that can split > code in half and rotate it so that with proper fixturing a mill can be used > to work on stuff larger than its X and/or Y axes, but it does not mirror. It > also can do 3D probing and map G-Code to non-planar surfaces. You'd think > mirroring would be an obvious feature to add to such a program but the author > is for some reason not interested. > > On Saturday, March 10, 2018, 3:27:12 PM MST, Chris Albertson > <albertson.ch...@gmail.com> wrote: > > In general it might not make sense to run the toll path backwards. > Foe example what if there was a tool change? Or in the case of a 3D > printer there would be plastic in the path and the extruder would > crash. Ans does reverse means the spindle goes backwards too. I'm > still thinking about what might happen if there are more than there > axis involved. > > But irregardless if it would make sense, it would not be hard to write > software that would "flip" a g-code file around so it runs bottom to > top. > > Some code just don't make sense to run in reverse order. For example > in the normal case you might start the spindle spinning then do some > work then turn it off. Doing this in reverse order is nonsensical: > Turn the spindle off do some stuff then turn it on. That does not > seem useful. > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users -- Chris Albertson Redondo Beach, California ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
