From: daniel watson Date: Sun, 12 Jun 2016 04:01:26 +0000 (-0700) Subject: add second hole subsubsection and picture X-Git-Url: http://challenge-bot.com/repos/?p=challenge-bot;a=commitdiff_plain;h=763861dd1171db6f029b280528bc7d1ef930b143 add second hole subsubsection and picture picture illustrates how moving holes apart can minimize rotation --- diff --git a/curriculum/arduino-to-deck/keep-holes-far-apart.svg b/curriculum/arduino-to-deck/keep-holes-far-apart.svg new file mode 100644 index 0000000..0d90c54 --- /dev/null +++ b/curriculum/arduino-to-deck/keep-holes-far-apart.svg @@ -0,0 +1,379 @@ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + image/svg+xml + + + + + + + + + + + + + + + + + + + + + + same verticaldistance + + + + + angle A isbigger than angle B + A + B + + + holes that are far apartminimize rotation + + + + diff --git a/curriculum/challenge-bot.scm b/curriculum/challenge-bot.scm index 32b3020..29b24eb 100644 --- a/curriculum/challenge-bot.scm +++ b/curriculum/challenge-bot.scm @@ -250,7 +250,20 @@ 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.]))) + 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"))))) (subsection :title [third and fourth hole and screw])) (section diff --git a/curriculum/makefile b/curriculum/makefile index 8ef3a0f..08764ae 100644 --- a/curriculum/makefile +++ b/curriculum/makefile @@ -80,6 +80,7 @@ challenge-bot.html: challenge-bot.scm \ arduino-to-deck/screw-cross-section.png \ arduino-to-deck/6-32-screw.png \ arduino-to-deck/4-place-arduino-closeup.png \ + arduino-to-deck/keep-holes-far-apart.png \ makefile @skribilo $< > $@