hole 146 and threaded into hole 148 a travel limiting screw 124 is located in a threaded through hole 150 placed near the dial pin 120 each fiber rolling mechanism 100 is mounted to a base 200 fig6 using bolts not shown placed through holes 156 located in one end of the bracket 102 referring to fig1 wherein a fully assembled mechanism 100 is displayed with a fiber 101 installed a fiber 101 is installed into the mechanism 100 by manually moving the channel 104 in the y direction thus opening up the two elastomeric surfaces 140 amp 142 the install operation being aided by a channel cutout 132 the fiber 101 is positioned between these surfaces and generally perpendicular to the y plane and then the channel is released to allow the clamping force k 1 to grip the fiber once the dial pin 120 is clamped using a screw 147 through hole 146 and threaded into hole 148 in the bracket 102 rotation of the dial will extend or retract a pin which translates the sliding block 122 thereby rotating the fiber 101 spring 116 provides a force k 2 which maintains block contact with the pin upon retraction as well as overcomes the block 122 sliding friction enhanced by spring 110 force k 1 the dial pin mechanism 120 is finely.