Canned SSV has been committed and will be in the next release of CNC12
CNC12 parameters for SSV
P981 : Time for Spindle Speed Variation to complete a Full Cycle in Seconds.
P982 : Amount of Speed Variation (Example; S = 500, P = 100, Speed would be 400 or 600 depending on where its at in the cycle).
To activate SSV, M94 /70 Turns it on, M95/70 Turns it off.
