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people:mcmullpm:lt_project 2011/11/07 11:38 people:mcmullpm:lt_project 2011/11/07 11:43 current
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^ Drill Motor - Pulse ^1.00 A ^ ^ ^ Drill Motor - Pulse ^1.00 A ^ ^
| | 1.07 A| | | | 1.07 A| |
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 +Since only one motor is running at a single time and for a certain period of time, it was decided that the 12V, 800mA power supply would suffice as the current is close enough for the drill motor.  The 5V source was removed.  A 5V adjustable regulator was created using the 3-terminal adjustable regulator LM117.  It was set to an output of 5V.  The 12V source was connected to the regulator which was connected to the 5V line (where the source was removed).
 +
 +The voltage regulator consisted of the LM117 3-terminal adjustable regulator, a 0.1uF capacitor, a 1uF electrolytic capacitor, a 240 ohm resistor and a 5 kilo ohm potentiometer.  The capacitors were added to improve transient response and as an additional input bypass.  The system was then checked to make sure all the motors still work and the device performs properly with the use of only one power supply.  The results were good and the switch did not seem to have any negative results.
 +
 +The next step was to replace the circuit box with a newer box.  This box would incorporate the use of several switches and LEDs so that motors can be turned on and off as necessary.  Two DPDT switches, several SPST, several fuses and a fuse holder were purchased to be used.  The box was modified to hold these items as well as some LEDs to give it a good appearance. 
 +
 +The size of the components needed to fit in the box were measured and mapped out on the project box.  To create the holes for the components, a soldering iron was first used to burn a sizeable hole into the box, followed by using drill bits by hand to create a neater finished look.  This was an alternative to just using a drill.  The holes were adjusted in size until all the components fit properly. 
 +
 +Now that there was a functioning project box, wires were soldered to each of the switches, LEDs and the fuse box.  The components were placed in the box and secured.  The circuit boards were removed from the old project box and place in the new one.  Several wires were cut, so they could be attached to the switches to add on/off functionality.  The auto/manual function was also implemented for the elevator motor.  In the manual function there exist two options: move elevator up or down.
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 +The old box is now completely replaced.  The LEDs are held in place using silicon concealer.  The project is almost complete.  The input jack used is not the one preferred so it is left outside of the project box, as the system is tested and the lid is put back on.  The LEDs used to indicate when the project has completed its cycle are now also placed on the box, as they were previously neglected.  All of the parts of the project are complete and the project update is done.  The only change would be to change the 750mA fuse to a 1A fuse to prevent it from blowing.  The drill motor typically draws 1A of current.
 +
 +===== Operating Instructions =====
 +This procedure has be taken and updated from the Engineering Physics 4A04 – Design and Synthesis Project Report from Section 5.0 – Operating Instructions.  The following instructions are to be followed prior to the activation of the device.  They are to be followed to properly prepare and setup the system
 +
 +  - Align four holes in the base of the central arm with the four holes in the center of the playing field. Alternatively, a clamp can be used to hold the base of the central arm in place if the actual playing field is unavailable.
 +    - Insert one ¼” bolt into each hole and fasten from underneath the playing surface using one ¼” washer and one ¼” nut.
 +  - Ensure that the elevator arm is 10.25” above the playing surface.  If the arm is not in this position, then its height can be manually adjusted using the switch:
 +    - Turn the elevator switch to the manual position. This ensures that there is no current being drawn back to the main circuit box and that the transistors are not charged.
 +    - Using the UP/DOWN switch the elevator arm will move accordingly.  Adjust the switch until the arm is at a height of 10.25.”
 +    - Returning the switch to the middle position stops the arm from moving. 
 +  - Plug in the 12V adapter to the wall socket and connect to 12V plug on the circuit box.
 +  - Ensure all motors are in the OFF position.
 +  - Turn the power switch on.  The ON LED should also turn on.  If not, the fuse has been blown and needs to be replaced.
 +  - Turn the laser/detector switch ON.  Make sure the lasers are aligned by breaking each beam and observing the change in LEDs.  The LEDs should be on when the switch is on and the lasers are hitting the detectors and off when there is an obstruction.
 +  - Return the on switch to OFF for the rest of the setup.
 +  - Ensure that the elevator arm is as close to the center of the playing surface as possible.  If this is not the case, it can be manually pushed back along the boom arm.
 +  - Turn the elevator switch to the AUTO position.
 +  - Prepare the source container for detection as follows:
 +    - If the source is a pop, then attach the longer of the two detection rods to the top of th can with Velcro.  Place source container on the playing surface.
 +    - If the source is a water bottle, then attach the shorter of two detection rods to the top of the bottle with Velcro.  Also, wrap 12” of duct tape around the center of the bottle to ensure that the plunger can grip the bottle and not allow it to fall through when raised.  Place source container on the playing surface.
 +    - If the source is a pop bottle, then spread liquid soap along the thickest part of the bottle above the label.  This will reduce friction as the plunger is lowered onto the bottle.  Dish soap is used instead of an oil based lubricant so that the plunger can be wiped off and not lubricated for subsequent trials.  No detection rod is required as the pop bottle is tall enough to break the signal on its own.  Place source container on the playing surface.
 +  - Prepare the destination container for detection by placing the destination detection rod inside the container.  Place destination container on the playing surface.
 +  - Ensure that the drill is secured into the plastic tube by screwing the threaded rod at the end of the drill motor into the plastic tube.  One revolution into the tube will suffice.
 +  - Turn the saw motor ON.
 +  - Turn the rotation motor ON.
 +  - At this point all systems are prepared and the device can be activated by turning the main switch on the circuit box to the ON position.
 +  - Once the trial is complete, indicated by the illumination of the LEDs on top of the circuit box, the main switch can be turned to the off position thereby deactivating the device.
 +
 +===== Circuit Diagrams =====
 +  * Will be uploaded at another date.
 +
 +

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