Saturday, November 24, 2012

08 Joint Design Nº 17

Arms can be single-jointed or double-jointed at the elbows. I am choosing to make single-jointed arms for this doll. Each arm has a ball at the top of the upper arm. The bottom of the upper arm is a socket. There is also a ball at the top of the lower arm. The bottom of the lower arm is a socket. The top of the hand has a ball. Click on any image to enlarge it.

I may have to do some slight adjustments at the wrists and the upper arms, so the balls will fit the sockets.

Balls and sockets do not have to be perfectly round. For example, the wrists may have balls that are more oval shaped, to fit the bottoms of the lower arms, which are more oval shaped.

This is a single elbow joint. It only allows a 90 degree bend at the elbow, but it looks more natural.

This is a double elbow joint. The double elbow joint allows the arm more range of motion at the cost of making the arm look awkward when it is flexed. A double joint has two balls joined together in a peanut-like shape.

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