On 2023/07/06 22:54, John Allwine wrote:
The latest software on the Pocket NC is using the same trajectory planner as
what is in LinuxCNC.
I haven’t followed the whole thread. What seems to be wrong with the trajectory
planner when doing 4 or 5-axis?
The trajectory planner only has one line look ahead for any rotary axis.
So this means that trajectory planning is not really happening and
performance is very poor when trying to achieve faster moves.
On Jul 6, 2023, at 12:34 PM, Eric Keller <keller...@gmail.com> wrote:
The Pocket NC runs Machinekit. I'm told machinekit has a better TP,
but I haven't seen any evidence of that.
On Thu, Jul 6, 2023 at 12:27 PM Roland Jollivet
<roland.jolli...@gmail.com> wrote:
The small 4-axis CNC machine,'Pocket Nc' uses LinuxCNC as far as I can
tell, and it seems to run just fine. Or does it?
Roland
On Tue, 4 Jul 2023 at 20:16, andy pugh <bodge...@gmail.com> wrote:
On Tue, 4 Jul 2023 at 18:34, Marius <mar...@mastercut.co.za> wrote:
The problem seems to be that our trajectory planner lack the ability to
look ahead for any rotary axis. This means that a coordinated move that
includes a rotary move will be dysfunctional at best.
It's not as bad as that.
There is a 9-axis blending planner in Tormach, but it's not trivial to
merge it with Linuxcnc due to divergence in the codebase.
If we could get hold of the patches that introduced it to Tormach then
we could look at integrating it, but doing it just from comparing the
code sounds hard.
--
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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