X-Git-Url: http://challenge-bot.com/repos/?a=blobdiff_plain;f=curriculum%2Fchallenge-bot.scm;h=6aabb6ddea07497bd1b84a470e346dcf5d18e708;hb=4e2c2b296295b8f45ab82edd5fc1666cf6ca5dab;hp=6e9f79319582e467efc88049cf0dc4e6795ae3ed;hpb=cf59d9965cb1b1dd0b58637d04c33aceda1cfc3b;p=challenge-bot diff --git a/curriculum/challenge-bot.scm b/curriculum/challenge-bot.scm index 6e9f793..6aabb6d 100644 --- a/curriculum/challenge-bot.scm +++ b/curriculum/challenge-bot.scm @@ -5,13 +5,15 @@ :title [challenge-bot] (chapter :title [mechanical] + (p [let's build your robot!]) (section :title [arduino to deck] + (p [let's attach the arduino to the deck.]) (subsection :title [required materials] (p [you will need the things in this picture. ,(figure :legend "arduino to deck / required materials" - (image :file "arduino-to-deck/0-required-materials.png")) + (image :file "arduino-to-deck/0-required-materials.png")) ,(itemize (item [medical kit with bandages]) (item [safety goggles]) @@ -20,32 +22,166 @@ (item [alan wrench]) (item [wood block]) (item [arduino]) - (item [#6-32x3/8\", four of them]))])) + (item [#6-32x3/8\", four of them]) + (item [robot deck, the white thing with a grid of holes1]))])) (subsection :title [first hole] (subsubsection - :title [choosing drill bit]) + :title [choosing drill bit] + (p [the arduino comes with holes in it already, so we will make + some choices around those holes. + choosing the right drill bit depends on what job you are + doing. + right now, we are making holes for screws to hold the + arduino to the deck. + there are two constraints between the hole and screw. + each hole needs to be big enough for the screw body to fit + through it. + the holes also need to be smaller than the screw's thread. + since there are holes on the arduino already, the screw was + chosen to match it. + the screw was chosen so that the hole on the arduino was + bigger than the screw body and smaller than its thread. + we will choose the biggest drill bit that fits through the + hole on the arduino, then use that to drill holes in the + deck.]) + (p [here's a cross section of a screw in the deck] + (figure :legend "screw cross section" + (image :file + "arduino-to-deck/screw-cross-section.png"))) + (p [check + ,(itemize + (item + [what would happen if the drill bit were larger than the + screw thread?]) + (item + [what would happen if the drill bit were smaller than the + screw body?]))])) (subsubsection - :title [inserting drill bit]) + :title [inserting drill bit] + (p (figure :legend "arduino to deck / insert bit" + (image :file "arduino-to-deck/1-insert-bit.png")) + [insert the drill bit into the teeth of the drill. + insert it far enough that the teeth will clamp on the + smooth part of the bit when they are tightened.]) + (p (figure + :legend "arduino to deck / twist tighten drill teeth" + (image :file "arduino-to-deck/2-twist-tighten-drill-teeth.png")) + [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.]) + (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]) + :title [holding drill] + (p [hold the drill with one hand on the handle and trigger. + put the other hand on the orange nozzle, before the + black spinning part.])) (subsubsection :title [arduino placement] (p [the arduino should be placed as shown in this picture.] (figure :legend "arduino to deck / place arduino" - (image :file "arduino-to-deck/3-place-arduino.png")) - [the top edge of the arduino should line up with the underside - of the holes ])) + (image :file "arduino-to-deck/3-place-arduino.png"))) + (p [here's a closeup] + (figure :legend "arduino to deck / place arduino closeup" + (image :file + "arduino-to-deck/4-place-arduino-closeup.png")) + [the picture above shows where to place the arduino on the deck. + the arduino should line up with the holes on the deck. + this alignment line is highlighted in pink. + on the arduino, there's a hole on the top left, between the + orange reset button and black headers. + 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.]) + (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. - smaller numbers means smaller screws.]) + bigger numbers mean larger screws. + smaller numbers means smaller screws.] + (figure :legend "arduino to deck / #6-32 screw" + (image :file + "arduino-to-deck/6-32-screw.png"))) (p [check ,(itemize (item