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Hot Water Fiber Bending Procedure (view source)
Revision as of 14:30, 17 April 2014
, 14:30, 17 April 2014no edit summary
*Have one technician tilt the entire bending unit (bending bar, bending plate, and chimney plates) with both hands so that a second technician can attach the popsicle stick to the bending plate. Place a large washer between the popsicle stick and the bending plate. This is so the fibers do not have to bend.
*Have one technician tilt the entire bending unit (bending bar, bending plate, and chimney plates) with both hands so that a second technician can attach the popsicle stick to the bending plate. Place a large washer between the popsicle stick and the bending plate. This is so the fibers do not have to bend.
*While holding the fibers in the proper oriented matrix, place the fibers gently into the popsicle stick. They will jut out of the end because of the extra length.
*While holding the fibers in the proper oriented matrix, place the fibers gently into the popsicle stick. They will jut out of the end because of the extra length.
*Gently place the popsicle stick top onto the fibers without stressing them, and put the two rods through the popsicle stick. The rods are different, so if they are not properly aligning with the threaded rods, switch their positions.
*Gently place the popsicle stick top onto the fibers without stressing them, and put the two rods through the popsicle stick. The rods are different, so if they are not properly aligning with the threaded rods, switch their positions. Secure the bolts onto the threaded rods a few turns so that the popsicle stick top doesn't move.
===Filling and Siphoning the Tank===
===Filling and Siphoning the Tank===
**Put the siphon completely underwater in the tank and pump it until no more air bubbles come out.
**Put the siphon completely underwater in the tank and pump it until no more air bubbles come out.
**Keeping the siphon underwater put the hose into the inlet of the left exclusion area and pump the siphon until no air comes out of the outlet of the left exclusion area.
**Keeping the siphon underwater put the hose into the inlet of the left exclusion area and pump the siphon until no air comes out of the outlet of the left exclusion area.
**
*After the water systems have been siphoned and there are no air bubbles, have two technicians place the bending unit and fibers into the room temperature water.
===Running the LabView Program===
===Running the LabView Program===
*Click on the dials for "Heater and Pump 1" and "Heater and Pump 2" to turn on all water heaters and pump.
*Click on the dials for "Heater and Pump 1" and "Heater and Pump 2" to turn on all water heaters and pump.
**There are three temperatures listed on the interface. There is the water temperature, and the two surface temperatures of each heater. Watch for a bit to make sure neither heater gets more than 3-5 degrees Fahrenheit hotter than the water temperature.
**There are three temperatures listed on the interface. There is the water temperature, and the two surface temperatures of each heater. Watch for a bit to make sure neither heater gets more than 3-5 degrees Fahrenheit hotter than the water temperature.
*The temperature should reach 160-162 degrees Fahrenheit before bending starts.
===Bending===
===Bending===
Three lab technicians will be needed for this procedure. Be sure all technicians have read the procedure before bending. This section should be completely in approximately 3-3.5 minutes and is extremely important. Fibers are very delicate in this stage and may easily break.
*Place the four stools upside down on the ground in the spots designated by tape.
*Wear thick rubber gloves to protect your hands from the hot water.
*Two technicians should remove the bending unit from the tank and place it upside down on the stools.
*All clamps should be removed from the bending unit. Be careful taking them off as now the chimney plates are no longer attached to the bending plate.
*With one technician holding the bending plate, and one technician bracing the chimney plates and bar, have the third technician take hold of the top bending plate and secure it on the first two threaded rods.
**Repeat this step for the other bending plate.
***This is the most important part. Do not drop the bending plate as it will break many fibers.
*With one technician still securing the bending plate, place the second two threaded rods in their positions and screw them into the bending plate.
*Cover the hot water tank.
*Lift the now bent fibers and bending unit on its side on top of the tank cover.
*Gently and evenly tighten the bolts on the popsicle stick. There are four- make sure none is too much tighter than any other. This will create an even and smooth S-bend.
*Once the S-bend is created uncover the tank, and gently place the bending unit into the hot water.
*In the LabView program, turn off heaters 1 and 2. Make sure the pumps are still running.
*Prop open the cover slightly and wait until the water cools to room temperature.
==Post-Bending Procedure and Cleaning==
==Post-Bending Procedure and Cleaning==
*Once the water returns to room temperature, have two technicians remove the bending unit from the water.
*Place tag stickers on the fiber bends. The outer 15 fibers will be labeled A-O and the inner 15 fibers will be labeled 1-15.
*Remove all collar tops and the last 4 chimney tops.
*Carefully remove the last collar top and support each fiber end as you remove the fibers from each chimney slot.
*Have a second technician remove the bolts of the popsicle stick and then the popsicle stick top.
*Remove these
===Cleaning===
===Cleaning===