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

* 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.
**** drilling
     1. what would happen if you used a larger drill bit than the one
       you used for drilling holes for the 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 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. how can you break the drill bit when drilling?
     8. should we drill at full speed?
        why or why not?
**** bolts
     1. 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?
     2. if you see a bolt described as =4-40x1.25=" how long is it?
     3. 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?
     4. what part of the screw does the screw driver go into?
**** part placement
     1. 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?
     2. why are the motors between the wheels?
     3. why are the motors pointed towards the caster in the back?
     4. why are the battery packs between the wheels and caster
        (roughly)?
     5. where is the breadboard?
     6. where is the caster?
     7. why is the caster in the middle of the back, instead of on the
        left or right?
     8. should the black chip (motor controller) be on the left or the right
     9. why should the chip be on the right?
Commit	Line	Data
25c1b477	1	* challenge-bot questions
	2	** mechanical questions
	3	*** arduino to deck
5f4c6e28	4	these questions are about attaching the arduino to the deck.
	5	you used a drill and drill bit to make holes for bolts to go
	6	through.
	7	we drilled through the arduino into the deck.
ba7c5f5a	8	**** drilling
89be24fa	9	1. what would happen if you used a larger drill bit than the one
25c1b477	10	you used for drilling holes for the arduino?
89be24fa	11	2. why did we use a drill bit that was wider than the body of the
	12	bolt used to hold the arduino?
	13	3. why do people use drill bits that are smaller or the same size as
	14	existing holes in circuit boards, like the holes in the blue
	15	arduino?
	16	4. why did we drill through the arduino, rather than marking holes
	17	and using the drill to make holes where the marks were?
	18	5. how does the drill hold onto the drill bit?
	19	6. what would happen if the drill bit teeth were not flat on the
	20	drill bit?
	21	7. how can you break the drill bit when drilling?
	22	8. should we drill at full speed?
	23	why or why not?
ba7c5f5a	24	**** bolts
89be24fa	25	1. the bolts used to attach the arduino are 6-32 bolts.
ba7c5f5a	26	the bolts used to attach the motor to the motor mount are
	27	4-40 bolts.
	28	Are the 4-40 bolts fatter or thinner than the 6-32?
89be24fa	29	2. if you see a bolt described as =4-40x1.25=" how long is it?
	30	3. on a =4-40= bolt, how many times does the thread wrap around
	31	one inch of the body?
	32	4 times?
	33	40 times?
	34	1. how many times does the thread of a =4-40= bolt wrap around
	35	two inches of the body?
	36	8 times?
	37	40 times?
	38	80 times?
	39	4. what part of the screw does the screw driver go into?
6f7d688c	40	**** part placement
89be24fa	41	1. name some reasons for the arduinos placement on the deck.
	42	1. could it have been placed diagonally? why or why not?
	43	2. could it have been placed in any other location? why or why not?
	44	3. could it be upside-down? why or why not?
	45	2. why are the motors between the wheels?
	46	3. why are the motors pointed towards the caster in the back?
	47	4. why are the battery packs between the wheels and caster
	48	(roughly)?
	49	5. where is the breadboard?
	50	6. where is the caster?
	51	7. why is the caster in the middle of the back, instead of on the
	52	left or right?
	53	8. should the black chip (motor controller) be on the left or the right
	54	9. why should the chip be on the right?