Step 7 continued
Ĕ Stop the VI by pressing the “Stop” button below the Min/Max calibration menu
Ĕ Right click the edge of the “Offset” control, select “Data Operations”, and select “Make Current Value default”
Ĕ Save the VI
7.9. Use the slider control on the left side to move the position setpoint to 20 percent of the arm, and notice:
• In the graph, the blue line indicates the setpoint, and the red line indicates the current position of the ball
• After the setpoint is set, the ball will oscillate back and forth across the set point until it finally settles
7.10. Gently roll the ball away from the set position, let go, and notice the system move the ball back to the original set
point
7.11. Move the set point to other locations, allow the ball to settle, and notice:
• The setpoint gradually changes to improve stability
• As the ball moves further away from the IR range sensor, the control system is less stable due to IR range sensor noise
Step 8: Troubleshooting
If your Balance Arm is unstable:
8.1. Make sure the table you’re working on is flat and stable
8.2. Make sure both myRIO and the battery are secured to the system, as their weight assist with stability
8.3. Check that the IR sensor is centered on the rail
8.4. Turn the ball so that its seam is parallel to the rails
8.5. Redo steps 7.7 and 7.8
Next Steps
• Learn about how the Balance Arm relates to control theory in the next section
• Get some ideas for expanding the Balance Arm on the first page of this section
Balancing Arm Assembly
119
Balancing Arm Assembly
119
Summary of Contents for 41427
Page 1: ...RobotBuilder sGuide for NI myRIO 41427 POWERED BY...
Page 2: ......
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Page 23: ...Finished Assembly Step 5 Subassembly Construction Instructions 21...
Page 25: ...Step 5 Step 6 Step 7 Step 9 Step 8 Step 10 Subassembly Construction Instructions 23...
Page 26: ...Step 12 Step 14 Step 16 Step 11 Step 13 Step 15 24 Subassembly Construction Instructions...
Page 27: ...Step 18 Step 17 Finished Assembly Subassembly Construction Instructions 25...
Page 29: ...Step 6 Finished Assembly Step 5 Subassembly Construction Instructions 27...
Page 54: ......
Page 57: ...Step 1 0 Step 1 1 Rover Vehicle Assembly 55...
Page 58: ...Step 1 2 Step 1 3 56 Rover Vehicle Assembly...
Page 59: ...Step 1 4 Rover Vehicle Assembly 57...
Page 61: ...Step 2 0 Step 2 1 Rover Vehicle Assembly 59...
Page 62: ...Step 2 2 60 Rover Vehicle Assembly...
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Page 65: ...Step 3 2 Step 3 3 Rover Vehicle Assembly 63...
Page 66: ...Step 3 4 Step 3 5 64 Rover Vehicle Assembly...
Page 68: ...Step 4 0 Step 4 1 66 Rover Vehicle Assembly...
Page 69: ...Step 4 2 Step 4 3 Rover Vehicle Assembly 67...
Page 70: ...Step 4 4 Step 4 5 68 Rover Vehicle Assembly...
Page 71: ...Step 4 6 Step 4 7 Rover Vehicle Assembly 69...
Page 73: ...Step 5 1 Step 5 0 Step 5 2 Step 5 3 Step 5 4 Step 5 5 Rover Vehicle Assembly 71...
Page 74: ...Step 5 6 Step 5 7 72 Rover Vehicle Assembly...
Page 76: ...Step 6 0 Step 6 1 74 Rover Vehicle Assembly...
Page 77: ...Step 6 2 Step 6 3 Rover Vehicle Assembly 75...
Page 78: ...Step 6 4 76 Rover Vehicle Assembly...
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Page 87: ...Step 1 0 Step 1 1 Step 1 2 BalancingArmAssembly 85 Balancing Arm Assembly 85...
Page 88: ...Step 1 4 Step 1 3 86 BalancingArmAssembly 86 Balancing Arm Assembly...
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Page 97: ...Step 2 0 Step 2 1 BalancingArmAssembly 95 Balancing Arm Assembly 95...
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Page 103: ...Step 2 12 Step 2 13 BalancingArmAssembly 101 Balancing Arm Assembly 101...
Page 105: ...Step 3 0 Step 3 1 BalancingArmAssembly 103 Balancing Arm Assembly 103...
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Page 108: ...Step 4 0 Step 4 1 106 BalancingArmAssembly 106 Balancing Arm Assembly...
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Page 115: ...Step 5 1 Step 5 0 BalancingArmAssembly 113 Balancing Arm Assembly 113...
Page 116: ...Step 5 3 Step 5 2 114 BalancingArmAssembly 114 Balancing Arm Assembly...
Page 117: ...Finished assembly should look like this BalancingArmAssembly 115 Balancing Arm Assembly 115...
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Page 127: ...Step 1 0 Step 1 1 Self Balancing Robot Assembly 125...
Page 128: ...Step 1 2 Step 1 3 126 Self Balancing Robot Assembly...
Page 129: ...Step 1 4 Step 1 5 Step 1 6 Self Balancing Robot Assembly 127...
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Page 132: ...Step 2 2 Step 2 3 130 Self Balancing Robot Assembly...
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Page 139: ...Step 3 8 Step 3 9 Self Balancing Robot Assembly 137...
Page 140: ...Step 3 10 Step 3 11 138 Self Balancing Robot Assembly...
Page 141: ...Step 3 12 Self Balancing Robot Assembly 139...
Page 143: ...Partial assembly should look like this Self Balancing Robot Assembly 141...
Page 144: ...Step 4 1 Step 4 0 142 Self Balancing Robot Assembly...
Page 145: ...Step 4 3 Step 4 2 Self Balancing Robot Assembly 143...
Page 146: ...Step 4 5 Step 4 4 144 Self Balancing Robot Assembly...
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Page 151: ...Step 5 0 Step 5 1 Self Balancing Robot Assembly 149...
Page 152: ...Step 5 2 150 Self Balancing Robot Assembly...
Page 153: ...Finished assembly should look like this Self Balancing Robot Assembly 151...