Hi,
I'm trying to have a pan+tilt movement of a moving-head not at linear spead, but rather in a more gentle manner: starting slow, speeding up, decelerating before reaching its final position.
I've assigned a curve (902) to Pan and Tilt in the Patch window / attributes, but there is no visible effect. It still moves at linear speed, starts abruptly and stops abruptly at its final position. I've trying moving manually, as well as per focus palettes.
What am I doing wrong?
Hi, the best way to apply a curve to an attribute seems to record a part for your cue and apply a curve to it (cue part --> attributes -->curve). I tried and it works 
"When applied to a cue, the “percent completion” of the cue is determined by applying the curve’s output level as the percent completion for all fade calculations. For single-part cues, the calculation applies only to intensity. For multipart cues, however, the curve applies to all parameters in the part."
This does work but it's probably the wrong solution for what you're wanting to do.
Just to make sure I used sACNview to check the output, in this case of a Pan parameter
This was the curve used
What's catching you by surprise is that the curve is used over the whole range of the parameter not with dynamic start and end points according to the range you're actually using for the current transition. So for my first screenshot I had to move the Pan parameter from -270 to +270.
In your case of curve 902
When going from e.g. Pan 0 to Pan 135 (assuming Pan max is 270, you would get this
which is more or less linear.
I don't think there is a solution to achieve what you want unless you're using cues, in which case a curve on a cue part would be the solution.
