Luca, et al, I think anything done to LinuxCNC to match Fanuc is a positive. Even now, when I talk to someone about LinuxCNC I get the question "Does it do Cutter Diameter/Radius Compensation?". The capability to put ANY Fanuc program into LinuxCNC is a very good thing.
regards Stuart On Wed, Sep 30, 2026 at 3:22 AM Luca Toniolo <[email protected]> wrote: > I'm deciding whether to work on a LinuxCNC feature and would like to > know first whether anyone would actually use it. > > Today, when a rotary axis moves together with X, Y or Z, F applies to > the linear axes only, and a rotary move on its own runs at F in degrees > per minute. On a 4th-axis wrap, where the surface of a cylinder is cut > with X and A, the surface speed therefore doesn't match F. The usual > workaround is inverse time (G93) from the CAM. > > The idea is a reference radius for each rotary axis, set in the INI. For > example, `[AXIS_A] FEED_RADIUS = 25` puts A in the feed calculation as > if it were a length at 25 mm from its centre. A move of A alone at F100 > would then run at 100 mm/min on the surface at that radius, and X with A > would run at F along the combined path. Siemens (FGREF) and Fanuc (a > parameter) do the same. > > Questions: > 1. Would you use this, or does G93 from your CAM already cover it for you? > 2. What machine: 4th-axis wrap, rotary table, something else? > 3. The useful radius is usually the stock radius, which changes per job. > Is a fixed INI value good enough, or would you need to set it from G-code? > > A short "yes, I'd use it", "no" or "G93 is fine" helps. If nobody needs > it, I'll leave it. > > Luca > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Addressee is the intended audience. If you are not the addressee then my consent is not given for you to read this email furthermore it is my wish you would close this without saving or reading, and cease and desist from saving or opening my private correspondence. Thank you for honoring my wish. _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
