On Wed, 2007-08-22 at 09:36 -0500, Jeff Epler wrote:
> On Wed, Aug 22, 2007 at 02:02:39PM +0000, ben lipkowitz wrote:
> > 
> > > The first couple of cuts I was using a chord length of about 100mm,
> > > meaning that my g-code statements around the leading edge where about
> > > 0.1mm apart or less, which caused the feedrate to slow down for some
> > > reason, which caused too much heat to build up in the leading edge.
> > 
> > If you use G64 P0.1 the trajectory planner *should* automatically blend 
> > out the unnecessary segments and give you full speed over the entire shape.
> 
> Unfortunately, G64 P- only simplifies nearly-colinear segments when they
> are purely XYZ movement.  If there is any movement on the other axes
> (ABC or UVW) then the simplification doesn't take place.


Ahhh, ok.  After reading the description of G64, I am realizing that the
reduction in feed rate is probably due to my acceleration limits.  I
have not really tuned those parameters and they are probably still very
conservative.

Does that make sense?

A question about radius cuts.  I would like to be able to command a
circular cut simultaneously in XY and UV (to cut a cylinder).

G01 x10 y10 u10 v10
G17 G2 x10 y10 u10 v10 i0 y2

I assume that this will cut a circle in the XY plane with a radius of 2
and start/end at x10 y10, but it seems from the description that uv will
remain stationary causing me to end up with a cone, is that correct? Or
is there a way to tell it to use both xy and uv for the circle?

Ryan



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