attach motor assembly to deck

[challenge-bot] / guide / challenge-bot.scm

diff --git a/guide/challenge-bot.scm b/guide/challenge-bot.scm
index cacc84d2c361e181f0b9bd8806c96ac4e3086ef7..da614d50dfe9b505dba0c5faaee74a4fed9cebf6 100644 (file)
--- a/guide/challenge-bot.scm
+++ b/guide/challenge-bot.scm
@@ -511,7 +511,60 @@
      (item [what are we doing to reinforce the motor tabs mechanically?])
      (item [does hot glue make an electrical connection?])))
    (subsection
-    :title [deck attachment]))
+    :title [motor mount]
+    (p [now let's attach the motor mount to the motor.])
+    (subsubsection
+     :title [angle bracket to motor mount]
+     (p [first, attach the angle brackets to the motor mounts with
+                #6-32x3/8 inch screws.])
+    (figure
+     :legend "motors / mount / angle bracket"
+     (video
+      :file "3-motor-assemblies/1-motor-mount/0-angle-brackets.ogv"))
+    (p [if you cover up 2 of the holes on the motor mount, the
+           remaining holes look like a surprised face.
+           these are the holes to attach the angle brackets.
+           make sure the angle brackets on one motor mount are attached
+           in a mirror image to the other.])
+    (p [check])
+    (enumerate
+     (item [should the motor mounts have angle brackets attached in
+                   a mirror image fashion?])
+     (item [why should the motor mounts have angle brackets attached in
+                   a mirror image fashion?])))
+    (subsubsection
+     :title [motor mount to motor]
+     (p [now attach the motor mount with angle brackets to the motor.])
+     (figure
+      :legend "motor / mount / mount to motor"
+      (video
+       :file
+       "3-motor-assemblies/1-motor-mount/1-motor-mount-to-motor.ogv"))
+     (p [we will attach the motor mount to the motor using #4 bolts.
+            these screws are thinner than the #6 bolts we have used.
+            to clamp down on the motor, we will use a #4 nut.
+            the white side of the nut should face outward.
+            this section of the nut will keep the nut from jiggling
+            loose off the bolt during normal operation.
+            the head of the #4 bolt is a philips head, so we will
+            use a philips head driver for it.])
+     (p [check])
+     (enumerate
+      (item [is the #4 bolt thicker or thinner than the #6?])
+      (item [do you have a ratcheting socket wrench, or not?]))))
+   (subsection
+    :title [deck attachment]
+    (p [now that the motor assemblies are together, we will attach them
+            to the deck.])
+    (figure
+     :legend "motor / motor assembly to deck"
+     (video
+      :file "3-motor-assemblies/2-motor-assembly-to-deck.ogv"))
+    (p [when attaching the motor assembly to the deck, be sure to push
+             the assembly as far outward from the center of the robot
+             as you can while tightening it down.
+             this will give more clearance to the wheels of the robot
+             so they do not rub the deck.])))
   (section
    :title [wheels]
    (subsection