Trigger to write only current individual sampled data to spreadsheet

Hi, I am new to labview and I have a task that I am not capable of completing.
My task is to read the values of two encoders simultaneously. I am reading the encoders using 2 counters. I am generating a clock using a third counter, allowing the encoders to use that clock for simultaneous sampling.
Then, using a physical push button, I want to trigger writing the angular positions of the two encoders to one spreadsheet file, making sure that ONLY both values at that same sample are written to the file. I want to write the ouputs of the encoders everytime I press the trigger, multiple times during execution, appending the new values to the same spreadsheet file. (Each column in the spreadsheet file should contain several outputs of each encoder: Column 1 for Encoder 1 and Column 2 for Encoder 2)
My problem is not knowing how to implement the writing of the encoder outputs at the same sample the trigger is pressed.
I hope it is clear what I am trying to do and I would greatly appreciate your help.
Please find the working VI attached.
Thank you,
r15
Attachments:
Meas-Ang-Pos-Buff_(2encoder with clock).vi ‏43 KB

Hi again
Thanks for your replies.
I followed your advices but I still need some adjusting for my code to work the way I intend it to.
To be more specific, I am building a robotic coordinate measuring arm where I aim to place the end-probe of the arm on an object and get the (x,y,z) coordinate at that specific point. To get the coordinate, I have to get the angular positions of the encoders (placed at the degrees of freedom of the arm) at that specific point. Hence, I will be using this physical trigger to signal writing the encoder values, at that specific point, to a spreadsheet file. After registering one point, I would like to be able to move the end-probe of the arm to another point and to follow the same procedure. (Use the trigger to signal writing the angular values of that new coordinate to the same spreadsheet file).
The problem with placing the trigger in the while loop is that on each iteration the value of the encoder is saved, which is not what is required of my task.
I want the trigger to be somehow independent of the while loop because of my application I described above.
I hope this makes it clearer as to what I am aiming for.
I modified my VI as you advised (find modified VI attached), and I will be gratefull if you can help me further with this task.
Thank you,
r15
Attachments:
Meas-Ang-Pos-Buff_(2encoder with clock).vi ‏43 KB

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Trigger to write only current individual sampled data to spreadsheet

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