This is an extension of the 'slow gcode' thread.  The work that Robert 
has done on the TP are now in the beta stage.  (has been for a little 
while - but I forgot to post anything about it on the user list.. :( )

I think the best way forward is to look at the thread on the forum and 
follow the directions to build it.  (if you are wanting to test the new TP)

http://www.linuxcnc.org/index.php/english/forum/10-advanced-configuration/27368-new-trajectory-planner-testersprograms-wanted

currently the new TP improves the path velocity (by read ahead) if the 
segments are

Line-line
Tangent line-arc
Tangent arc-arc

Here are a couple screenshots..  This is showing a simple program (one 
rogge had posted a while back with an entry/exit move )

%
(1" square with rounded corners)
G90 G54 G20
g64p.001q.001
G0 X0 Y.25 Z.25
z0
G1 Y.75 F999
G2 X.25 Y1 I.25
G1 X.75
G2 X1 Y.75 J-.25
G1 Y.25
G2 X.75 Y0 I-.25
G1 X.25
G2 X0 Y.25 J.25
g0z.25
M30

http://electronicsam.com/images/KandT/testing/screenshots/Screenshot%20from%202014-01-26%2014:53:00.png

This is running new TP strait G64 - peaks at 222ipm
http://electronicsam.com/images/KandT/testing/screenshots/Screenshot%20from%202014-01-26%2014:34:21.png

Old TP running strait G64 - peaks at 159ipm
http://electronicsam.com/images/KandT/testing/screenshots/Screenshot%20from%202014-01-26%2014:36:20.png

This is the new TP running G64P.001Q.001 Still peaks at 222ipm - just 
slows a bit at the sharp corners.
http://electronicsam.com/images/KandT/testing/screenshots/Screenshot%20from%202014-01-26%2014:42:11.png

Old TP running G64P.001Q.001 - slows down a lot more..  (I think mainly 
because the parabolic blend needs to be slowed down quite a bit compared 
to the circular blend to match the path)
http://electronicsam.com/images/KandT/testing/screenshots/Screenshot%20from%202014-01-26%2014:40:36.png

Thanks all goes to Robert - he has coded this all on his own.. (again - 
impressive)

sam


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