Our initial testing saw the nylon strings tangling with one another. Hence, to prevent such wire entanglements, we decided to use tubings that will guide the wires all the way from the fingers to the motor spool. The use of the tubing also gave the added benefit of making the wires more taut as the tubings resist the range of motion that the wires can take on. As one of our motors is placed at the back, we implemented a screw eye to help guide the tubing straight to the motor spool. These wire routing measures can be seen in Figure 1 below.
Figure 1: Nylon wire routing within the motor housing
Previously, there were also issues with the coiling of wires with our spools. The nylon wire of our motor tended to coil under the spool of the motor, which not only exerted strain on the wrong part of the motor, but also caused the motor to get stuck after a while. In order to prevent this problem, we glued down the first round of nylon string to the spool of our motor. This measure also prevents the nylon string from rotating around the spool unnecessarily. If the first round of the nylon string is not held down, it will keep rotating around the spool and prevent the wire from coiling. Figure 2 below shows how we glued on the nylon wires onto the spool of the motor.
Figure 2: Glue on the spool