It Can't Work Lab
If you were gone today in 2013-2014 go to the Feb 26th Static Uses page for today Friday Feb. 21st information and videos.
If You Were Gone Today: in 2012 - 2013
1. You may make up the lab with Mr. Jenkins students on March 7th (Thursday) Pds. 1,2,3,4,6,or 7
My Scoring was:
10 pts. if you get the motor you made to run continuously for 30 seconds or more
9 pts. if 13-29 seconds
8 pts. if 9-12 seconds
7 pts. if <9 seconds plus lab report with Purpose, Procedure (diagram), Conclusion, and Summary
Suggestions to make your motor work:
1. sand just the ends of the pop can conducting posts where you connect the alligator clips from the power supply
2. bend the pop can strip in half so you have a 90 degree angle for vertical posts
3. use a paper punch to make grooves so that your motor terminals sit evenly in them
4. tack your post the width of a 35 mm film canister lid apart with two tacks each on the wooden base (the tacks do not need to be very deep, just so the post does not turn)
5. wrap your wire around something cylindrical (marker, small diameter pvc pipe, your finger) leaving enough to wrap around the ring with about 3 or 4 cm left on each side for terminals to set on top of your post in the grooves.
6. Sand one wire terminal post all the way around (360 degrees) BUT IMPORTANT only sand one side other the other terminal post so that the current can shut off on the non sanded side. You see there is a insulting coating on the copper wire and an insulting coating on the pop can strip posts.
7. Make sure your loop is balanced (two semi circles) so it is not heavy on one half and turns evenly. If bottom heavy just move your windings around the loop so half the loop is on each side of the loop.
8. Do not exceed 2.5 volts on the power supply as that will pull your loop down toward the magnets and assist the spinning motion by starting the spin with your finger.
9. If your motor doesn't work, try just moving the magnets a bit and spinning it by hand again.
10. Make sure you don't short circuit the power supply by letting the alligator clips touch each other.
11. Make sure power supply is hooked to DC!
12. Make sure the dial on power supply is turned counterclockwise all the way before turning on the power strip to start the power supply. Then slowly turn up power until you have between 2 and 3 volts.
13.
My Scoring was:
10 pts. if you get the motor you made to run continuously for 30 seconds or more
9 pts. if 13-29 seconds
8 pts. if 9-12 seconds
7 pts. if <9 seconds plus lab report with Purpose, Procedure (diagram), Conclusion, and Summary
Suggestions to make your motor work:
1. sand just the ends of the pop can conducting posts where you connect the alligator clips from the power supply
2. bend the pop can strip in half so you have a 90 degree angle for vertical posts
3. use a paper punch to make grooves so that your motor terminals sit evenly in them
4. tack your post the width of a 35 mm film canister lid apart with two tacks each on the wooden base (the tacks do not need to be very deep, just so the post does not turn)
5. wrap your wire around something cylindrical (marker, small diameter pvc pipe, your finger) leaving enough to wrap around the ring with about 3 or 4 cm left on each side for terminals to set on top of your post in the grooves.
6. Sand one wire terminal post all the way around (360 degrees) BUT IMPORTANT only sand one side other the other terminal post so that the current can shut off on the non sanded side. You see there is a insulting coating on the copper wire and an insulting coating on the pop can strip posts.
7. Make sure your loop is balanced (two semi circles) so it is not heavy on one half and turns evenly. If bottom heavy just move your windings around the loop so half the loop is on each side of the loop.
8. Do not exceed 2.5 volts on the power supply as that will pull your loop down toward the magnets and assist the spinning motion by starting the spin with your finger.
9. If your motor doesn't work, try just moving the magnets a bit and spinning it by hand again.
10. Make sure you don't short circuit the power supply by letting the alligator clips touch each other.
11. Make sure power supply is hooked to DC!
12. Make sure the dial on power supply is turned counterclockwise all the way before turning on the power strip to start the power supply. Then slowly turn up power until you have between 2 and 3 volts.
13.