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This is Jack's completed hip, legs and
feet assembly. The feet and shins are fashioned from 2" PVC pipe, the
shins from 1.5" PVC pipe, and the hip is fashioned from 3" PVC pipe. |
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This is Jack's ankle joint. I gave
him feet so that I might better be able to put boots on Jack and be able to
tie them on securely once some padding/stuffing is added o the foot and
shin. |
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This is a close up of Jack's knee joint.
The articulation of the joint is created by cutting a notch in the larger
pipe to give the smaller pipe room to swivel through the normal range of
motion for a knee. |
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A front close-up of the knee joint
showing the bolt and nut assembly that creates the joint. |
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This is 1/8" plastic-coated nylon cord
that is used to create the actual hip and shoulder joints on Jack. |
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This is another picture of Jack's
hip/leg/foot assembly. |
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Jack's assembled arm, showing the flexed
elbow joint. |
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Another shot of the arm assembly with
flexed elbow. |
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This is a section of 4" Flex pipe that I
used for Jack's spine. I will be drilling holes in the appropriate
areas of this pipe to mount the hips and shoulders in. Once this is
done I will crop the spine at an appropriate length to create the neck. |
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A picture of one of Jacks arm assemblies
before being put together. Each of Jack's elbow, knee and ankle joints
are created basically the same. The larger pipe of the joint has a
notch cut out (using a Dremel* tool) which will allow the smaller pipe
to slide in from the front. It is not necessary for the cut to be
precise, just large enough for the smaller pipe to have a free range of
movement. The notch should be about two to two and a half times the
width of the notch to provide the right range of motion. Then both
pipes are drilled with a 1/4" drill bit. Once through, I moved the bit
around a little to make the holes just a tad larger than 1/4". Once
the holes are drilled then I put the pipes together and insert a 1/4" x 2.5"
machine bolt through the entire joint. Add a lock washer and then the
appropriate 1/4" nut. Tighten the nut down fairly tight but not so tight
that you will crack the PVC. The lock washer should keep the nut from
backing off of the bolt. The nut should be placed to the inside side
of the joint. If you want, you can then cut off the little excess of
bolt that comes through the joint. |