clarify sentence on arduino holes

[challenge-bot] / guide / challenge-bot-questions.org

diff --git a/guide/challenge-bot-questions.org b/guide/challenge-bot-questions.org
index c7ce82a53f270f888dc71d6079dcd663d2b333ef..4246fe3acc435449a6ba615c202a891cbe17be13 100644 (file)
--- a/guide/challenge-bot-questions.org
+++ b/guide/challenge-bot-questions.org
@@ -1,14 +1,41 @@
 * challenge-bot questions
 ** mechanical questions
 *** arduino to deck
-    these questions are about attaching the arduino to the deck.  you used
-    a drill and drill bit to make holes for bolts to go through.  we
-    drilled through the arduino into the deck.
-    0. [@0] what would happen if you used a larger drill bit than the one
+    these questions are about attaching the arduino to the deck.
+    you used a drill and drill bit to make holes for bolts to go
+    through.
+    we drilled through the arduino into the deck.
+    1. what would happen if you used a larger drill bit than the one
        you used for drilling holes for the arduino?
-    1. why do people use drill bits that are smaller or the same size as
-       existing holes in circuit boards, like the blue arduino?
     2. why did we use a drill bit that was wider than the body of the
        bolt used to hold the arduino?
-    3. why did we drill through the arduino, rather than marking holes
+    3. why do people use drill bits that are smaller or the same size as
+       existing holes in circuit boards, like the holes in the blue
+       arduino?
+    4. why did we drill through the arduino, rather than marking holes
        and using the drill to make holes where the marks were?
+    5. how does the drill hold onto the drill bit?
+    6. what would happen if the drill bit teeth were not flat on the
+       drill bit?
+    7. name some reasons for the arduinos placement on the deck.
+       1. could it have been placed diagonally?  why or why not?
+       2. could it have been placed in any other location? why or why not?
+       3. could it be upside-down?  why or why not?
+    8. should we drill at full speed?
+       why or why not?
+    9. how can you break the drill bit when drilling?
+    10. the bolts used to attach the arduino are 6-32 bolts.
+        the bolts used to attach the motor to the motor mount are
+        4-40 bolts.
+        Are the 4-40 bolts fatter or thinner than the 6-32?
+    11. if you see a bolt described as =4-40x1.25=" how long is it?
+    12. on a =4-40= bolt, how many times does the thread wrap around
+        one inch of the body?
+        4 times?
+        40 times?
+        1. how many times does the thread of a =4-40= bolt wrap around
+           two inches of the body?
+           8 times?
+           40 times?
+           80 times?
+    13. what part of the screw does the screw driver go into?