Re: Programming for Eccentric Turning...
hello mr Wizard i have been thinking about G88
in image 1 is the example from the manual : at each spindle revolution, the machine moves only on Z with a constant increment ( eq among secvention 22 ) , or on both Z&X with constant increments ( secvention 23 ); so far, so good
in image 2 is a single arch thread : depending on how the pitch is computed, at each spindle revo, machine moves with variable increments for X and Z, but the math for computing those increments is not complicated
so far, in image 1 & 2, there is more than one pitch among a line segment, or among an arch
in image 3 are special threads ( left low is a sin wave, just like Jashley was describing in #1 ); each toolpath represents a pitch : in this case, during one spindle revolution, we don't talk about an increment for X & Z axis, but about a complex geometry
i will repeat my self :
... image 1+2 : many pitches among a simple geometry ( case a )
... image 3 : a complex geometry, within 1 pitch ( case b )
G88 delivers "case a" without doubts, but do you know if it can deliver also "case b" ? have you delivered such a complex shape only by using G88 ?
for example : is it possible to move the cnc among an ellipse toolpath, by using G88 + a single spindle revolution ?
if this would be possible, than Okuma rocks
so far i never tried G88, i don't even know if i have this function installed, so i thougth to ask / kindly
Ladyhawke - My Delirium, https://www.youtube.com/watch?v=X_bFO1SNRZg