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1 | #+OPTIONS: toc:nil |
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2 | * challenge-bot questions |
3 | ** mechanical questions |
4 | *** arduino to deck |
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5 | these questions are about attaching the arduino to the deck. |
6 | you used a drill and drill bit to make holes for bolts to go |
7 | through. |
8 | we drilled through the arduino into the deck. |
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9 | 1. what would happen if you used a larger drill bit than the one |
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10 | you used when drilling holes through the arduino? |
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11 | 2. why did we use a drill bit that was wider than the body of the |
12 | bolt used to hold the arduino? |
13 | 3. why do people use drill bits that are smaller or the same size as |
14 | existing holes in circuit boards, like the holes in the blue |
15 | arduino? |
16 | 4. why did we drill through the arduino, rather than marking holes |
17 | and using the drill to make holes where the marks were? |
18 | 5. how does the drill hold onto the drill bit? |
19 | 6. what would happen if the drill bit teeth were not flat on the |
20 | drill bit? |
21 | 7. how can you break the drill bit when drilling? |
22 | 8. should we drill at full speed? |
23 | why or why not? |
24 | 9. name some reasons for the arduinos placement on the deck. |
25 | 1. could it have been placed diagonally? why or why not? |
26 | 2. could it have been placed in any other location? why or why not? |
27 | 3. could it be upside-down? why or why not? |
28 | *** motor |
29 | these questions are about attaching the motor to the deck. |
30 | to attach the motor to the deck, first we attached motor mounts. |
31 | the motor mounts are the square things with 6 holes of |
32 | various sizes. |
33 | 1. the bolts used to attach the arduino are 6-32 bolts. |
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34 | the bolts used to attach the motor to the motor mount are |
35 | 4-40 bolts. |
36 | Are the 4-40 bolts fatter or thinner than the 6-32? |
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37 | 2. if you see a bolt described as =4-40x1.25=" how long is it? |
38 | 3. on a =4-40= bolt, how many times does the thread wrap around |
39 | one inch of the body? |
40 | 4 times? |
41 | 40 times? |
42 | 1. how many times does the thread of a =4-40= bolt wrap around |
43 | two inches of the body? |
44 | 8 times? |
45 | 40 times? |
46 | 80 times? |
47 | 4. what part of the screw does the screw driver go into? |
48 | 5. why are the motors between the wheels? |
49 | 6. why do we wrap tape around the body of the motors? |
50 | 7. why are the motors pointed towards the caster in the back? |
51 | 8. why do we put a zip tie around the motor? |
52 | *** breadboard |
53 | the breadboard is the white thing in the middle of the deck. |
54 | it has a black thing plugged into it. |
55 | almost everything with wires plugs into the breadboard. |
56 | 1. where is the breadboard? |
57 | 2. what's the difference between stranded and solid core wire? |
58 | 3. why are we using solid core wire for plugging into |
59 | the breadboard? |
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60 | 4. do we have the black chip (motor controller) be on the left or |
61 | the right of the breadboard? |
62 | 5. why should the chip be on the right on our robot? |
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63 | *** batteries |
64 | there are two battery packs on the robot. |
65 | one of them powers the motors, and is in the clear battery pack. |
66 | the black battery pack powers the arduino. |
67 | 1. why are the battery packs between the wheels and caster |
68 | (roughly)? |
69 | 2. should you pick up a battery by the wires coming out of it? |
70 | 3. what are the wires coming out of the battery called? |
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71 | 4. why do we put the glue dots on the side of the battery pack |
72 | without the on/off switch? |
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73 | *** caster |
74 | the caster is the solid metal sphere. |
75 | it is held in a 3d printed plastic housing called the caster standoff. |
76 | the standoff is fixed to the deck with 3 nuts and bolts. |
77 | 1. where is the caster? |
78 | 2. why is the caster in the middle of the back, instead of on the |
79 | left or right? |
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80 | 3. what would happen if there were no caster on the back |
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81 | of the robot? |
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82 | *** tools |
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83 | 1. do you have a ratcheting socket wrench? |
84 | what is a ratcheting socket wrench? |
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85 | 2. what is the socket wrench used on? |
86 | 3. what are the pliers? |
87 | 4. what do you use to take the colored part off the end of a wire? |
88 | *** misc |
89 | 1. what is the robot tread made out of? |
90 | 2. why is it difficult to push the sonar into the sonar holder? |
91 | 3. what would happen if the sonar were easy to push into the sonar |
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92 | holder? |