I was thinking something similar, and today i'm going to try.
in fact, working with 3dsmax, when i increase the density of points, the
resulting speed decrease. so maybe it's simple to modify the density of 
the end of lines smoothly to achieve what i need.

Il 11/09/2010 10:19, Ian W. Wright ha scritto:
>    Brian, I don't know how relevant this is but, on my little
> machine, any script with a lot of little moves programmed
> hardly ever gets up to the programmed speed - i.e. EMC2
> doesn't finish its acceleration before deceleration to the
> end of the segment starts. I suspec that this may work
> against what you are suggesting...
>
> Ian
>
> On 11/09/2010 02:48, BRIAN GLACKIN wrote:
>    
>> Think back to your math class -  functions were approximated what by short
>> segments.  I see you get the idea for the XY path but you missed the accel
>> part.  You can approximate the acceleration path in the same way.
>>
>> Remember a G1 has a speed function.  If you can figure out how fast
>> something is supposed to be traveling a position X, then you can can figure
>> the speed at X1.  The commanded speed change between these two points will
>> be acceleration your acceleration
>>
>> G01 X1.0 Y1.0 F10
>> G01 X2.0 Y1.0 F20
>> between the above lines will be the change of speed (aka accerlation) in the
>> X direction
>> G01 X1.0 Y2.0 F30
>> Now you have an acceleration component in two direction (one involving a
>> reversal of direction)
>>
>> you should be able to take it from here.
>>
>>
>> Be careful, you may begin to visualize functions if you do this too much.
>> But then again, isn't that art?
>>
>>
>>      
>
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