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Wednesday, November 23, 2011

Plan of Procedures

Materials List


Item
Description
QTY
Size
Remarks
1
24 AWG Red Stranded Hookup Wire
1
2'

2
24 AWG Black Stranded Hookup Wire
1
2'

3
18 Awg Speaker Wire
1
6'

4
350 MHz Cat 5e Solid PVC White Cable
2
40'
1 Comes in Seaperch kit
5
Electrical Tape - Black
1
Roll

6
Motor. 0.7 A
5
12 VDC
3 Come in SeaSwitch Box Kit, extras are free
7
Sealed Lead Acid Battery Charger
1
12 V, 500 mA

8
Sealed Lead Acid Battery
1
12 V, 7 Ah

9
Battery Charger Cable
1
SLA Cord

10
SeaSwitch Control Box Kit
1
N/A
Contents roughly unknown
11
Propellers - Plastic
5
1/8" Shaft Size
3 come in Seaperch kit, extras are free
12
Propeller Shaft Threaded Coupler
5
N/A
3 come in Seaperch kit, extras are free
13
Alligator Clip
2
N/A

14
Black Alligator Clip Insulator
1
N/A

15
Red Alligator Clip Insulator   
1
N/A

16
Computer Monitor
1
N/A
Free
17
CMOS Surveillance Camera
1
N/A
$20.73
18
Zip Tie
1
Box
$4.00
19
DPDT switch
5
N/A
3 come in Seaperch kit, extras are $1.00 each
20
Video RCA Cable
1
40'

21
Shrink Wrap
1
8'

22
Male power plug pigtail cable
1
3'
To connect camera, $1.59
23
Lighter
1
N/A
For shrink wrap
24
1 Solder
1
60/40

25
Clamp
3
2 hole 1-3/16" Outside Diameter



Tools List


Item
Description
Use
1
Wire Cutter
To cut wires
2
Wire Stripper
To strip wires
3
Scissor
To cut electrical tape
4
Plyer
To pull zip ties
5
Film Cannister
To waterproof motors, 1 extra for $0.59
6
Wax
To waterproof motors
7
Drill
To cut necessary holes in control box
8
Drill Bit
5/64"
9
Drill Bit
1/4"
10
Metal Cup
Melt wax in this
11
Electric Hotplate
Used for melting wax
12
Potting Holder
For protection when dealing with hot wax
13
Goggles
For protection, wear the whole time
14
Sodering iron
To soder connections in control box and motors


Parts List


Item
Description
QTY
Size
Remarks
1
Waterproof motor
5
12 VDC
Will be made using wax and film cannisters




Part P1: Motor setup

  1. Connect each motor (M6) to a 12V battery (M8) using positive (M1) and negative wires (M2).
  2. If the motor (M6) spins clockwise, mark the terminal the red wire is attached to as positive and the other as negative.

Part P2: Motor Waterproofing

  1. Using electrical tape (M5), cover each hole on every motor.
  2. Cut 6” off of each Cat5e wire (M4) and remove the inner wires.  Strip every inner wire ¼”.
  3. Connect each pair of color/white wires to the motors (M6).  NOTE: Leave the following extra pairs of wires to the side: green/white, blue/white, grey/white.
  4. Designate the following motors to their function: motor with green wire- Up/down, motor with blue wire-Left/right, motor with grey wire- starboard forward/reverse, motors with orange wires- one is for port forward/reverse and the other motor is for accessory control.  REMEMBER: The color wire in each pair is positive and the white wire is negative.
  5. Drill a 5/64” (T8) hole in the direct center in both the top (cap) and bottom of all five film canisters (T5).  (There will a dimple on both the top (cap) and bottom, this is the exact center)  Make sure to drill directly of this dimple.
  6. Remove the caps of the film canisters and run one of the pairs of motor wires from step 4 through each.  Refer to diagram P2-1.
  7. Insert a Propeller Shaft Threaded Coupler (M12) into each motor (M6).
  8. Put the wax bowl ring in a metal cup and put the metal cup (T10) onto a hot plate (T11).
  9. When the wax is melted, mark a line 7mm from the bottom each film canister (T5).
  10. Carefully pour wax up to the 7mm line in one of the film canisters (T5).
  11. Place the motor (M6) in the canister (T5), and push through the wax until the propeller shaft is through the bottom whole completely.
  12. Place this canister (T5) on the potting holder (T12).
  13. Repeat steps 10-12 for the other 4 motors (M6).
  14. Once wax is dry, pour more hot wax on top the hardened wax all the way up to the edge of the canister (T5).  While the wax is still liquid, close the cap. (CAUTION: watch out for spraying hot wax).
  15. Repeat step 14 for other four motors (M6).
  16. Check to make sure all motors (P1) spin.  If they do not or spin slowly, use your finger to manually spin the motor, then try again with a power source (M8).
Diagram P2-1

Part P3: Motor and Camera Mounting

  1. Mount the two Forward/Reverse motors (P1) using zip ties (M18) on the front and rear of the motor.
  2. Use Diagram P3-1 for motor (P1) placement.
  3. For the Up/Down motor (P1), use pipe clamp (M25) to attach to specified spot on ROV shown in diagram P3-1
  4. For the left/right motor (P1), use two zip ties (M18) on the front and back of motor to attach it to the ROV.  (Use diagram P3-1 for placement)
  5. For accessory motor (P1), leave to side for the person controlling the arm to mount.
  6. Camera (M17) should be held down using zip ties (M18) on both sides of the mounting platform.  Use diagram P3-2 for placement.
Diagram P3-1
Diagram P3-2

Part P4: Control Box Setup

  1. Use a ¼” drill bit (T9) to make seven holes in the control box (M10)
  2. Make three holes on top of the box (M10), one being in the exact center and the other two being on ether side of the exact center hole.  (allow at least ½” between the three holes)
  3. On the front and back of the control box, drill a ¼” inch hole in the center of the surface.
  4. On the front of the control box (M10), drill two holes on either side of the center hole at least ¾” from the center hole.
  5. For step 2, 3, and 4, attempt to duplicate diagram P4-1
  6. Unscrew the top nut on each DPDT switch (M19) using your finger, refer to diagram P4-2
  7. Separate the top of the control box (M10) from the rest of the control box using your hands.
  8. Place a DPDT switch (M19) in each of the ¼” drill holes in the control box (M10) that are colored red in diagram P4-3.  Screw the top nut of each DPDT switch (M19) back on with your finger, securing the DPDT switches (M19) to the control box (M10).
  9. Run the red (M1) and black (M2) wires through the front facing center hole in the control box (M10). (Colored blue in diagram P4-3).  Push in enough so that 3” of red (M1) and black (M2) wire is in the control box (M10).
  10. Run both Cat5e wires (M4) through the back facing center ¼” drill hole.  (Colored green in diagram P4-3).  Push in enough so the 6” of each Cat5e wire (M4) is inside the control box.
  11. Strip ¼” off of the black (M2) and red wires (M1).
  12. Strip 4” off of both Cat5e wires (M4).
Diagram P4-1
Diagram P4-2


Diagram P4-3


Part P5: Wire connection

  1. Separate the two 6’ strands of speaker wire (M3). (The speaker wires will be  connected from the manufacturer)
  2. Cut one of the 6’ strands of speaker wire (M3) into 6 10” strands and 10 1” strands.  (These strands will be the long and short negative speaker wires in diagram P5-1)
  3. Cut the remaining 6’ foot strand of speaker wire (M3) into 6 1’ strands (These strands will be the positive speaker wires in diagram P5-1)
  4. Strip every strand of positive and negative speaker wire ¼” on both ends of each strand.
  5. Strip ¼” of every positive and negative inner Cat5e wire (M4).
  6. Designate a green blue and grey positive wire from one of the Cat5e wires (M4) to be unnecessary.
  7. Wrap these three designated inner Cat5e wires (M4) and their negative paired white wire in electrical tape (M5) and tape them to the bottom of the control box (M10) using more electrical tape (M5).
  8. Using diagram P5-1, make all 48 labeled connections by intertwining the wires securely and wrapping them in electrical tape(M5).
  9. EXCEPTIONS: For connections 37-48 and video connection A, cut a 1” sleeve of shrink wrap (M21), place the sleeve of shrink wrap on one side of the wire, make the connection, wrap the connection in electrical tape (M5), slip the shrink wrap over the connection, and use a lighter (M23) to heat and shrink the shrink wrap.  For connections 2, and 3 place stripped wire inside of alligator clip slot and crimp the connector, then attach the alligator clip (M13) to the battery by opening the mouth of the clip and allowing it to grip the battery terminal (M8).  For connections 5-14 and 17-36, make connection by securely wrapping wire around the switch prong (Do not use electrical tape)
  10. Use diagram P5-1 and P5-2 to check the connections that are made by using diagram P5-1.
Diagram P5-1
Diagram P5-2

1 comment:

  1. Mark,

    This is an impressive set of designs and plans. I apologize for not having participated as much as normal lately due to heavy workload demands. I have put this link down as a "favorite" now so it should be easier to keep up.

    Your plan of procedures is certainly solid in assembling and testing in a good order to make sure you sustain a logical order.

    I am unfamiliar with the use of the wax specified to seal the motor shafts, but as there are no paths for the water to travel within your design it should be quite effective as a seal.

    I also expect you have gained some specific knowledge from someone who has successwfully employed this solution already?

    My primary questions are about:

    1.) the specific location for the front/back motor shown in diagram P3-1. I looks like you may lose some effectiveness of drive power due to the tubes on either side of the location for the propeller. Are there reasons why this can not be placed above or below to cross-tube?

    and, 2.) There must be plans to add specific weights for leveling and to achieve a "nuetral bouyancy" I would suspect?

    Good work,

    Kevin

    ReplyDelete