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Author Topic: X, Y, Z roll values.  (Read 1739 times)

June 06, 2007, 05:59:57 PM
Read 1739 times

Onge

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Hi,

I am trying to position my fixtures in the Visual3D by using the fixture properties. Positioning in X, Y and Z fields is fine, but when I what to Roll in X, Y and Z it does not produce the effect I want.
For Example I have a Martin SCX700 which by default points towards the camera with values of 0 in the X, Y an Z Roll fields.
I want the scanner to be tilted down by 40degress  and pointing towards the left (looking towards the stage and lights).
I put 40degress in the X roll, this gives the tilt I want.
I put 270degrees in the Y roll so it points to the left.
Well it does not produce the position I want or what I think it should be.

Another thing is if you put a value in the X Roll and then put the same value in the Z Roll it cancels each of the out.

Does not seem to matter what values I put in X, Y or Z roll I cannot get it into the scanner pointing the way I want it to.
Is this a bug or am I really being thick.

Any help would be really appreciated.

André

OK I have now got them in the positions I want, just kept adding/subtracting 10degrees here and there to get what I wanted. What an awkward way of doing it.
Here are the values that I used.
For the Scanner on the left of the stage (looking towards stage) I wanted it tilting down and pointing to the right.
So values in X, Y and Z Roll are as follows :- 270, 130, 90
For the Scanner on the right of the stage (looking towards stage) I wanted it tilting down and pointing to the left.
So values in X, Y and Z Roll are as follows :- 90, 310, 90

If someone could explain the correlation of those figures to what is represented I would be most appreciative.
Other software I have used is not as awkward as this to position fixtures.

Andre
« Last Edit: June 11, 2007, 11:37:18 AM by Onge »
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June 11, 2007, 11:48:59 AM
Reply #1

Onge

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Is it possible that one or more of the x, y or z axis is moving with the fixture.

For example if you put 40 degrees into the x-roll it will tilt the fixtures top towards you, then if you put 90 degrees in y-roll, it has turned the fixture 90 degrees but it has rolled it around fixtures "new" y-axis not the global y-axis. x, y and z axis should never change. I should know this as I have programmed 3, 4 and 5 axis CNC machines. If the axis changed it would make a real mess of the component and the machine.

I hope I am making myself clear here it's much easier to see in the program than trying to explain in words.

André
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