Re: Jerk Control in machines
hy pette i saw also some of your replies in another thread, then you started this one
seems you are hunting, somehow, the big picture; please, i need to understand better what is behind your words :
... what made you to start looking into this ?
... why are you so focused on jerk , tangential/smooth movement ? if i may, this is local/simple, while mcs is global
sorry for repeating, my advice, is to eliminate from equation cad & cam, and focus only on cnc/mcs, because is better to focus only on one at a time; if you clear your thougths with cnc/mcs, then cad/cam will be clear, not the other way arround; cad/cam is an extension, is not the key, it simply generates input to suit the cnc
also, from cnc/mcs, i proposed that 1 linear axis example, because is simpler to focus on a single axis, rather than all at once
okey, now i will try to answer to some texts :
Its a series of point to point moves
not point to point ... is vecinity towards other vecinity; think of a group that croses the street on a crosswalk: some go middle, some go near an edge, others may go diagonally
there is a tolerance, just like how you would turn a part with diameter 100, and accept as good the 99.8 and also the 100.3
at the Gcode level the machine does not know if its a spline or an arc
this is true only for segmented toolpaths, thus g-code only with G01s; otherwise, it will make a difference between g01 and g02 for example
as for splines, i think you allready know that most cnc's dont have a g code for it
that's the nominal, while mcs is cheking that real motion is within tolerance, or else will/should stop the machine
I have started to play with G64
is this exact stop mode ?
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