Pre-Lab 4 - Fall 2008Pre-Lab 4 - Fall 2008 Please build the following VIs prior to this lab: 1. yourname_MotorDrive_Tacho.vi Build a VI to generate a DC voltage to drive a motor and read the tachogenerator voltage.  Open the VI “DAQ_MotorDrive_Tacho_F08.vi” located in the melab share drive  Save this VI as yourname_MotorDrive_Tacho.vi to the desktop or your network drive.  Go to the front panel. o Select Pointer Slide from the Numeric subpalette and place it on the front panel and change the label to “Motor Drive Input Control”.  On the block diagram o Wire the Pointer Slide to the DAQmx Read.vi. o Wire the Pointer Slide to the Merge Signal icon that is connected to theVoltage Signal Chart. This displays the Motor Drive Voltage on the Voltage Signal Chart.  To make the digital display corresponding to the Pointer Slide visible, right-clicking on the Pointer Slide >> Click on Visible Items >> Click on Digital Display. You can now set the the Motor Drive Voltage using the Pointer slide or entering a number in the Digital Display.  Set the Pointer Slide properties by right-clicking on the Pointer Slide and selecting Properties from the Pop-up menu o “Data Range” tab  Range: -5.0, +5.0  Increment: 0.01  Save this completed VI as yourname_MotorDrive_Tacho .vi. It should look similar to Figure 1 and Figure 2. Figure 1. Front Panel for yourname_MotorDrive_Tacho.viFigure 2. Block Diagram for