Hi,

I am a complete beginner (I have read a manual several times) and novice on this forum so if this is in the wrong place SORRY

I want to control a rotary table (a nikken cnc260 with an alpha 21 controller) to spin something like this:

OMEGA = constant rotation rate + sin(time)

where OMEGA is the final rotation rate

The motion must be smooth i.e. no jumps. I have tried to code in lots of blocks on the controller changing the rotation rate incrementally, but at each step I get a jump in speed rather than a smooth acceleration (I have tried buffering using a G08 command but still get jumps and accelerating using a G06 ( but this can't decelerate so can only do half the waveform).

Any ideas?