describe angle brackets to motor mounts

diff --git a/guide/3-motor-assemblies/1-motor-mount/0-angle-brackets.ogv b/guide/3-motor-assemblies/1-motor-mount/0-angle-brackets.ogv
new file mode 100644 (file)
index 0000000..4e59d88
Binary files /dev/null and b/guide/3-motor-assemblies/1-motor-mount/0-angle-brackets.ogv differ

diff --git a/guide/challenge-bot.scm b/guide/challenge-bot.scm
index cacc84d2c361e181f0b9bd8806c96ac4e3086ef7..f121f3f5500757792cd37edd6eb45d8fc8fc886f 100644 (file)
--- a/guide/challenge-bot.scm
+++ b/guide/challenge-bot.scm
@@ -510,6 +510,30 @@
      (item [are the motor tabs strong?])
      (item [what are we doing to reinforce the motor tabs mechanically?])
      (item [does hot glue make an electrical connection?])))
+   (subsection
+    :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]))
    (subsection
     :title [deck attachment]))
   (section