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Line 44: − It's important for bending to make sure the scintillating end of the fibers are square and flush. This process usually requires 2 technicians.+ − + − + − + − +
Hot Water Fiber Bending Procedure (view source)
Revision as of 15:52, 22 May 2014
, 15:52, 22 May 2014→Bending Procedure
===Placement into Collars===
===Placement into Collars===
====Securing the Orientation====
====Securing the Orientation====
For bending, it's important make sure the scintillating end of the fibers are square and flush. This process usually requires 2 technicians.
*Start by placing a flat block in front of the bundle and secure the collar onto the bending unit. Have one technician hold the flat block in place (or clamp the block to the table.)
*Start by placing a flat block in front of the bundle and secure the collar onto the bending unit. Have one technician hold the flat block in place (or clamp the block to the table.)
**Loosen the collar around the bundle enough to the fibers to slide but not change orientation.
**Loosen the collar around the bundle enough to allow the fibers to slide but not change orientation.
*Gently take each fiber and push it through the collar so that it butts up against the flat block. If you have a second technician with you, have them watch the fuse sites and you'll be able to see when all the fibers are flush.
*Gently take each fiber and push it through the collar so that it butts up against the flat block. If you have a second technician with you, have them watch the fuse sites to ensure that the fibers are flush.
**'''Note:''' Be sure not to strain any of the fibers during this process!
**'''Note:''' Be sure not to strain any of the fibers during this process!
**When you are certain that the fibers are flush against the block, carefully tighten the chimney around the bundle so that the fibers neither slide nor change orientation. If you see that any fibers are offset by more than ~.5mm, repeat this process.
**When you are certain that the fibers are flush against the block, carefully tighten the chimney around the bundle so that the fibers neither slide nor change orientation. If you see that any fibers are offset by more than ~.5mm, repeat this process.
====Offsetting the Fibers====
====Offsetting the Fibers====
The next step involves offsetting the SciFi end past the bending unit. This will compensate for the length of fiber required to produce the S-bend.
The next step involves offsetting the SciFi end past the bending unit. This will compensate for the length of fiber required to produce the S-bend.
*Cautious of the fiber orientation of the bundle, secure the second collar around the bundle.
*Minding fiber orientation, secure the second collar around the bundle.
*Make sure the first collar (the collar closest to the popsicle stick) is tight enough to hold the fibers in place without slipping. Detach the first collar from the bending plate.
*Make sure the first collar (the collar closest to the popsicle stick) is tight enough to hold the fibers in place without slipping. Detach the first collar from the bending plate.
*Loosen the second collar so that the fibers may slide through it without damage or change in orientation.
*Loosen the second collar so that the fibers may slide through it without damage or change in orientation.
*Slide the first collar so that the fibers are flush against the edge of the bending plate.
*Slide the first collar so that the fibers are flush against the edge of the bending plate.
*Tighten the second collar so that the fibers do not slide.
*Tighten the second collar so that the fibers do not slide.
*Loose the first collar so it may slide along the fibers. Move it to the "start" position as labelled on the bending plate and then tighten it again so the fibers do not slide or change orientation.
*Loosen the first collar so it may slide along the fibers. Move it to the "start" position as labelled on the bending plate and then tighten it again so the fibers do not slide or change orientation.
*Loosen the second collar and move the first collar to the "finish position". This moves the fibers one inch past the bending unit plate to compensate for the length of fiber needed to produce the S-bend. This is also the final horizontal position of the fibers for the entirety of the bending process.
*Loosen the second collar and move the first collar to the "finish position". This moves the fibers one inch past the bending unit plate to compensate for the length of fiber needed to produce the S-bend. This is also the final horizontal position of the fibers for the entirety of the bending process.
* Tighten the second collar and all collars after (third through seventh). Loosen the first collar, and re-attach it to the bending unit plate and then tighten it.
* Tighten the second collar and all collars after (third through seventh). Loosen the first collar, and re-attach it to the bending unit plate and then tighten it.