On Wed, 5 Jul 2023 at 09:17, <marcus.bow...@visible.eclipse.co.uk> wrote:
> The problem I have is that because 4th axis is rotary motion on my
> setup, the way the angular rotation speed is handled means the rotary
> axis rotates at a very slow speed (a fraction of what the G1 linear
> speed would be).
This isn't related to the lookahead, but rather to the interpretation
of "F" for combined moves.
It is generally better (and safer) to use G93 inverse-time mode for
combined rotary and linear motions.
("Safer" because some CAM software can put a _tiny_ spurious linear
move in, and what was intended as a pure rotary motion becomes a mixed
motion with the F-word interpreted differently)
--
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
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