[while holding the drill bit, twist end of the drill to tighten
the teeth.
make sure that the teeth end up gripping the flat part of
- the drill bit.]))
+ the drill bit.])
+ (p [check
+ ,(itemize
+ (item
+ [where should the teeth clamp down on the drill bit?])
+ (item
+ [what would happen if the teeth tightened on the recessed
+ part of the drill bit?]))]))
(subsubsection
:title [holding drill]
(p [hold the drill with one hand on the handle and trigger.
the green circle shows where the hole is.
the blue box encloses the arduino hole and two deck holes.
place the arduino hole mid-way between the two
- deck holes.]))
+ deck holes.])
+ (p [check
+ ,(itemize
+ (item
+ [should the arduino be upside-down?])
+ (item
+ [what should the upper side of the arduino align with?])
+ (item
+ [why not place the arduino up along the left side of the
+ robot?]))]))
(subsubsection
- :title [drilling]))
+ :title [drilling practice]
+ (p [strength check]
+ (itemize
+ (item [put on safety goggles])
+ (item [unplug drill])
+ (item [hold drill in one hand])
+ (item [point drill at the ground])
+ (item [point drill at the wall])))
+ (p [steps for drilling into wood block]
+ (itemize
+ (item [plug in the drill])
+ (item [place the drill bit in position])
+ (item [bring the drill up to full speed, and keep it at full
+ speed while lowering and raising the drill])
+ (item [push down until the drill bit has passed through an inch
+ of the wood block])
+ (item [keep the drill at full speed])
+ (item [stop before the drill smashes into the wood block])
+ (item [keep the drill at full speed by holding the trigger])
+ (item [bring the drill straight back up])
+ (item [hold the trigger down to keep the drill at full speed])
+ (item [once the drill is back out of the hole, let go of the
+ trigger])))
+ (p [check
+ ,(itemize
+ (item
+ [should the drill be at full speed while the drill bit is
+ going down into the wood and coming back up?])
+ (item
+ [how do you keep the drill at full speed?])
+ (item
+ [what would happen if the drill bit were not at full
+ speed?])
+ (item
+ [what would happen if the drill were twisted sideways while
+ the drill bit were in the wood?]))]))
+ (subsubsection
+ :title [drilling the first screw hole]
+ (itemize
+ (item [place the drill bit in position])
+ (item [bring the drill up to full speed, and keep it full speed])
+ (item [push down until the drill bit has passed through the
+ deck])
+ (item [keep the drill at full speed])
+ (item [stop before the drill smashes into the arduino])
+ (item [keep the drill at full speed by holding the trigger])
+ (item [bring the drill straight back up])
+ (item [hold the trigger down to keep the drill at full speed])
+ (item [once the drill is back out of the hole, let go of the
+ trigger]))
+ (p [check
+ ,(itemize
+ (item
+ [should the drill be at full speed while the drill bit is
+ going down into the wood and coming back up?])
+ (item
+ [what would happen if the drill bit were not at full
+ speed?])
+ (item
+ [how do you keep the drill at full speed?]))])))
(subsection
:title [first screw]
(subsubsection
:title [fastening arduino to deck using #6-32x3/8\" screw]
(p [the "#6" part of "#6-32x3/8\"" is how big around the bolt is.
it is related to wire gauge.
- bigger numbers mean larger screw.
+ bigger numbers mean larger screws.
smaller numbers means smaller screws.]
(figure :legend "arduino to deck / #6-32 screw"
(image :file
[in the motor assembly, there are #4-40x1.25\" screws.
are those fatter, thinner, or the same thickness as the
#6-32x3/8\" screws?]))])
- (p [the "32" part is a measurement of how close the threads are to
- each other.
+ (p [the "32" part of "#6-32x3/8\"" is a measurement of how close
+ the threads are to each other.
this is related to the angle of the thread, which is also
called pitch.
it is a count of how many times the thread wraps around one
the screw body?])
(item [what about 2 inches?
how many times will the thread wrap around two
- inches of the screw body?]))]))
+ inches of the screw body?])
+ (item [where can a tool exert turning force on
+ the screw?]))]))
(subsubsection
:title [fasten the arduino board to the deck]
- (p [push the 6-32 screw into the deck from the underside and at the
- same time, spin the 6-32 screw clockwise while looking
- down on its head.
- twist until the bottom of the screw is
- about to stick out on the top side of the deck.])
+ (p [push the #6-32 screw into the deck from the underside.
+ the underside is the brown side.
+ at the same time, spin the 6-32 screw so it rotates
+ clockwise while looking down on its head.
+ twist until the tip of the screw is about to stick out on
+ the top side of the deck.])
(p [hold the arduino board flat to the deck and line up the arduino
hole so the screw can come up through it.
continue tightening the screw into the deck, spinning the same
projects / challenge-bot / blobdiff