Cue crossfade snaps

Hi,

I have a moving head which needs to go through 3 different positions, I stored the positions in different cues.

Now my plan was to use the crossfader to determine the speed at which the fixture moves to the next position (it has to follow a person walking).

Unfortunately, as soon as I move the crossfader, the fixture snaps to the next cued position.

Does anyone know how to resolve this, so all parameters follow the position of the crossfader?

Thanks in advance

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  • Hi Stuart,

    Thanks for your reply. Unfortunately it's not possible to use playbacks since there are some cues which would be too difficult to do with playbacks.

  • I am just a user, so what I say will need confirmation by the gurus, but it seems the CS desk has ‘automatic gear change’ regarding movers. On a manual desk you have to insert a Mark cue to tell a light to re-position before its next appearance. The CS desk has a Move-on-Dark facility which automatically presets all non-intensity values in the cue which precedes the cue when the light is faded up so it is ready. It does this as quickly as possible as it has no idea how much time it’s got. This logic has a hard time when there are no intervening cues.

    Most movers have a motor speed parameter which could be used to slow the movement, handy in case you want it to move quietly. This might take the curse off it but you can’t match it to an actor’s movement in real time.

    I have a show file under investigation where the desk was spuriously sending my mover to its endstops and speed to maximum, so the positioning logic may have faults, but I suspect what you are seeing is intended.

    However I have noticed that when you set a position using a playback the head’s progress does follow the playback fader movement. Hence my suggestion 

  • I don't have much experience with lighting myself, I did look into the motor speed parameter, however our mover (Martin Mac 250+) didn't seem to have one.

    I did notice that when I set a larger 'IN' time on the second cue, the mover does actually pan/tilt slower. We could 'kind of' make it work like this and have the actor try to follow the light, however it is of course less than ideal.

  • At present (2.5), LTP parameters like Pan and Tilt operate as follows:

    • If the light is "Off" at the end of the crossfade, use the "Move Dark Time" to pre-position for the next cue.
    • When the next crossfade starts, move to the new position using the cue "In Time".

    We are planning on also allowing the crossfader to control the progress of LTP parameter moves as you've requested, (change request CSCON-35744), however this change will not be in 2.6.0

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  • At present (2.5), LTP parameters like Pan and Tilt operate as follows:

    • If the light is "Off" at the end of the crossfade, use the "Move Dark Time" to pre-position for the next cue.
    • When the next crossfade starts, move to the new position using the cue "In Time".

    We are planning on also allowing the crossfader to control the progress of LTP parameter moves as you've requested, (change request CSCON-35744), however this change will not be in 2.6.0

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