+#+OPTIONS: toc:nil
* challenge-bot questions
** mechanical questions
*** arduino to 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.
+ 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?
+ =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?
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. should the black chip (motor controller) be on the left or the right
- 5. why should the chip be on the right?
+ 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.
(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.
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
+ 3. what would happen if there were no caster on the back
of the robot?
*** tools
1. do you have a ratcheting socket wrench?