On Sat, 3 Jul 2021 at 08:33, Alec Ari via Emc-developers <emc-developers@lists.sourceforge.net> wrote:
> Just curious, how would LinuxCNC detect a lack of precision in floating > point? There are trivial x86_64 specific math instructions which would > probably be faster than what LinuxCNC has used since the beginning but if > these instructions happened to be off by a few decimals somewhere, how would > you know? Would LinuxCNC throw a fault or would the machine just drift > further and further away from where it's supposed to be or what? I suspect that you would never notice. LinuxCNC only really needs to work to microns ot tenths of thou, so as long as it's all good to 5 decimal places it is unlikely that a problem would be seen. The motors (spindles aside) don't turn long enough in one direction to accumulate errors. And spindles tend to re-zero the encoder counters when doing synchronised moves. -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and lunatics." — George Fitch, Atlanta Constitution Newspaper, 1912 _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
