- 8. should we drill at full speed? why or why not?
- 9. how can you break the drill bit when drilling?
- 10. the bolts used to attach the arduino are 6-32 bolts. the bolts
- used to attach the motor to the motor mount are 4-40 bolts. Are
- the 4-40 bolts fatter or thinner than the 6-32?
- 11. if you see a bolt described as =4-40x1.25=" how long is it?
- 12. on a =4-40= bolt, how many times does the thread wrap around
- one inch of the body? 4 times? 40 times?
- 1. how many times does the thread of a =4-40= bolt wrap around
- two inches of the body? 8 times? 40 times? 80 times?
- 13. what part of the screw does the screw driver go into?
+*** motor
+ these questions are about attaching the motor to the deck.
+ to attach the motor to the deck, first we attached motor mounts.
+ the motor mounts are the square things with 6 holes of
+ various sizes.
+ 1. the bolts used to attach the arduino are 6-32 bolts.
+ the bolts used to attach the motor to the motor mount are
+ 4-40 bolts.
+ Are the 4-40 bolts fatter or thinner than the 6-32?
+ 2. if you see a bolt described as =4-40x1.25=" how long is it?
+ 3. on a =4-40= bolt, how many times does the thread wrap around
+ one inch of the body?
+ 4 times?
+ 40 times?
+ 1. how many times does the thread of a =4-40= bolt wrap around
+ two inches of the body?
+ 8 times?
+ 40 times?
+ 80 times?
+ 4. what part of the screw does the screw driver go into?
+ 5. why are the motors between the wheels?
+ 6. why do we wrap tape around the body of the motors?
+ 7. why are the motors pointed towards the caster in the back?
+ 8. why do we put a zip tie around the motor?
+*** breadboard
+ the breadboard is the white thing in the middle of the deck.
+ it has a black thing plugged into it.
+ almost everything with wires plugs into the breadboard.
+ 1. where is the breadboard?
+ 2. what's the difference between stranded and solid core wire?
+ 3. why are we using solid core wire for plugging into
+ the breadboard?
+ 4. do we have the black chip (motor controller) be on the left or
+ the right of the breadboard?
+ 5. why should the chip be on the right on our robot?
+*** batteries
+ there are two battery packs on the robot.
+ one of them powers the motors, and is in the clear battery pack.
+ the black battery pack powers the arduino.
+ 1. why are the battery packs between the wheels and caster
+ (roughly)?
+ 2. should you pick up a battery by the wires coming out of it?
+ 3. what are the wires coming out of the battery called?
+*** caster
+ the caster is the solid metal sphere.
+ it is held in a 3d printed plastic housing called the caster standoff.
+ the standoff is fixed to the deck with 3 nuts and bolts.
+ 1. where is the caster?
+ 2. why is the caster in the middle of the back, instead of on the
+ left or right?
+ 3. why do we put the glue dots on the side of the battery pack
+ without the on/off switch?
+ 4. what would happen if there were no caster on the back
+ of the robot?
+*** tools
+ 1. do you have a ratcheting socket wrench?
+ what is a ratcheting socket wrench?
+ 2. what is the socket wrench used on?
+ 3. what are the pliers?
+ 4. what do you use to take the colored part off the end of a wire?
+*** misc
+ 1. what is the robot tread made out of?
+ 2. why is it difficult to push the sonar into the sonar holder?
+ 3. what would happen if the sonar were easy to push into the sonar
+ holder?