Contouring and CVV was Re: DeskNC for Windows experience anyone?

Jon,

Since EMC uses the start-next-accel-at-point-of-current-decel
technique for contouring, I am sure you are correct that unintended
consequences would occur if trajectory planning "inserts" were
applied.

In true contouring, the simple algorithm above is not used.
Aceel/decel value(s) is based on delta angle(s), length of entity
(es),type of entities (arc,line), radius of arc(s), etc. All the
while considering feedrate which will affect total distance needed to
stop axis motion (at any given time). So there is sometimes no
decel/accel between blocks, and other times accel/decel may take
place over several blocks.

Ballendo

--- In CAD_CAM_EDM_DRO@y..., Jon Elson <elson@p...> wrote:
<snip>
>I don't know of any good place to insert such code. the trajectory
>planning could look ahead to decide whether contouring was
>appropriate. But, making such decisions on the fly with some sort
>of rule sounds like it could have a bunch of unintended
>consequences. I'm happy to make the decision manually.
>Jon