+#+OPTIONS: toc:nil
* challenge-bot questions
** mechanical questions
*** arduino to deck
- these questions are about attaching the arduino to the deck. you used
- a drill and drill bit to make holes for bolts to go through. we
- drilled through the arduino into the deck.
- 0. [@0] what would happen if you used a larger drill bit than the one
- you used for drilling holes for the arduino?
- 1. why do people use drill bits that are smaller or the same size as
- existing holes in circuit boards, like the blue arduino?
+ these questions are about attaching the arduino to the deck.
+ you used a drill and drill bit to make holes for bolts to go
+ through.
+ we drilled through the arduino into the deck.
+ 1. what would happen if you used a larger drill bit than the one
+ you used when drilling holes through the arduino?
2. why did we use a drill bit that was wider than the body of the
bolt used to hold the arduino?
- 3. why did we drill through the arduino, rather than marking holes
+ 3. why do people use drill bits that are smaller or the same size as
+ existing holes in circuit boards, like the holes in the blue
+ arduino?
+ 4. why did we drill through the arduino, rather than marking holes
and using the drill to make holes where the marks were?
- 4. how does the drill hold onto the drill bit?
- 5. what would happen if the drill bit teeth were not flat on the
+ 5. how does the drill hold onto the drill bit?
+ 6. what would happen if the drill bit teeth were not flat on the
drill bit?
- 6. name some reasons for the arduinos placement on the deck.
- 0. [@0] could it have been placed diagonally? why or why not?
- 1. could it have been placed in any other location? why or why not?
- 2. could it be upside-down? why or why not?
+ 7. how can you break the drill bit when drilling?
+ 8. should we drill at full speed?
+ why or why not?
+ 9. name some reasons for the arduinos placement on the deck.
+ 1. could it have been placed diagonally? why or why not?
+ 2. could it have been placed in any other location? why or why not?
+ 3. could it be upside-down? why or why not?
+*** 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?
+ 4. why do we put the glue dots on the side of the battery pack
+ without the on/off switch?
+*** 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. 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?
projects / challenge-bot / blobdiff