the screw?]))]))
(subsubsection
:title [fasten the arduino board to the deck]
+ (p [first we'll put the screw into the deck just enough so the deck
+ holds it in place.
+ then we will hold the arduino up to the screw and finish
+ tightening the screw down.
+ with the screw partially in, we do not have hold it as
+ rigidly while we are also holding the arduino and
+ 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
tighten until the screw head touches the deck.
do not continue tightening after that.])
(p [the arduino should still be flat against the deck still, just
- as it was before tightening the screw.]))
+ as it was before tightening the screw.])
+ (p [check
+ ,(itemize
+ (item [why do we insert the first screw partially before
+ holding up the arduino?])
+ (item [which side of the deck is the top side?]))]))
(subsubsection
- :title [assessment]
- (p [does the arduino stay with the deck when the deck moves?
- can the arduino board still rotate a few degrees?
- warning, if you rotate the arduino board too much, you
- will unscrew it from the deck and you'll have to screw it
- back in.
- rotating a few degrees should be ok.]))
+ :title [assessment of the first screw]
+ (itemize
+ (item [,(bold [warning]), if you rotate the arduino board too
+ much,you will unscrew it from the deck and you'll have to
+ screw it back in.
+ rotating a few degrees should be ok.])
+ (item [does the arduino stay with the deck when the deck moves?])
+ (item [can the arduino board still rotate a few degrees?]))))
+ (subsection
+ :title [second hole and screw]
(subsubsection
:title [arduino board move relative to deck]
(p [without any screws, the arduino board can move independently of
- the deck.])
- (p [with the first screw, the arduino can rotate around one point
- on the deck.])))
- (subsection
- :title [second hole and screw])
+ the deck.
+ it can translate and rotate freely.
+ with the first screw, the arduino can rotate around one
+ point on the deck and can no longer translate much.])
+ (p [the second screw limits rotation a lot.
+ it also makes translation even more difficult.
+ it might even be too small to be detectable by directly
+ looking at it.])
+ (p [to choose where the second hole and screw should go, we should
+ keep in mind that the goal is to attach the deck to the
+ arduino.
+ this means minimizing rotation and translation.
+ the picture below shows that the second hole should be as
+ far as possible from the first hole, since that minimizes
+ rotation.]
+ (figure :legend "arduino to deck / keep holes far apart"
+ (image :file "arduino-to-deck/keep-holes-far-apart.png"))))
+ (subsubsection
+ :title [drilling and attaching second screw]
+ (p [to drill the second hole, follow the same steps as drilling the
+ first hole.
+ hold the arduino down as before, and drill through the hole
+ furthest away from the first hole.
+ then insert and tighten the screw as before.])))
(subsection
:title [third and fourth hole and screw]))
(section
projects / challenge-bot / blobdiff