I thought this was fixed in the pid loop.. (I thought mesa had the same problem)
On Thu, Apr 3, 2025 at 2:15 PM Jon Elson <el...@pico-systems.com> wrote: > On 4/3/25 12:21, Jon Elson wrote: > > On 4/2/25 21:25, gene heskett wrote: > >> > >> That STG card sounds like magic. So the question is, does > >> anybody have the src code for that driver? Recompiling > >> it to run on arm64 might be an amazing thing. Professor > >> Bertho S. possible??? Or already done? > >> > >> > > The STG card is a full-length ISA card, so connecting to > > an ARM CPU might not be simple. The driver is in the git > > repository under: > > > > > https://github.com/LinuxCNC/linuxcnc/blob/master/src/hal/drivers/hal_stg.c > > > I have not looked at the stg code in 20 years, since I moved > to using my own hardware. Looking at the code, I do NOT see > the hack to detect and suppress large position jumps. > Without that hack, you have a significant chance of getting > following error trips any time the encoder passes through > the home position. Reading the code, it LOOKS like the > latch register is not used except during the home-to-index > operation. Reading the 24-bit encoder value a byte at a > time will have a possibility of catching registers during > the change. It seems that this could possibly happen at > other times, but I was able to catch it in Halscope back > when I was still using the STG back about Dec 2004. > > Jon > > > > _______________________________________________ > Emc-users mailing list > 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
