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Coiled cables for sensors

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  • Coiled cables for sensors

    Does anyone have a link to a "colied" cable for a servo?
    I found this on the old forums- ant cheaper options

    Neoprene Rubber Jacket Retractile Cord Black, 300 VAC, 18/7 AWG, 2' Retracted
    McMaster-Carr Part number: 7088K83
    http://www.mcmaster.com/#coiled-wire/=lqwhrc

  • #2
    Those cables from McMaster are designed for industrial use and are priced accordingly. I can't find any minimum gauge requirements for servo wires. Perhaps you could get by with a simple old fashioned coiled telephone handset cable.

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    • #3
      RE14 - j

      iii. PWM (servo) wires are 20 AWG or 22 AWG.

      The robot inspector at one meet we were at was telling a team that their coiled telephone cord was likely illegal as he said they are typically 28 g wire. I can't find gauge sizes for cheap online cords, but I did find more expensive cords can be had with appropriate gauge.

      example -

      http://www.cablescience.com/coils/el...ded-ec.html#ec

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      • #4
        Note that your title says 'sensor' but your message says 'servo'...

        In any case, we used one of these coiled cables last year and found it to be more trouble than it was worth. It took up a lot of space, took a lot of force to stretch and tended to jam and get in the way.

        Not sure exactly what problems you are trying to solve, but note the following:

        If you are running more than one servo, you only 'technically' need three wires for the first servo and one additional wire for each additional servo, as long as you stay within the current carrying capacity and stay within a reasonable level of voltage drop on the power and ground wires.

        Servos can have high peak current requirements, especially when stalled, so keep that in mind when extending servo wires. Even if the servo has a 26 ga 'factory' lead, the amount of torque available at stall when at the end of a three foot 26 ga extension can be quite limited. 'Heavy duty' servo extensions are offered at 22 ga or 20 ga, for example

        Consider using a cable/drag chain approach (https://www.amazon.com/dp/B01M1JDKZ0...ter_B075CGRPK5) if applicable your situation.

        Cable spiral wrap (also typically available at the local 'big box' home improvement store) can often do the job, perhaps assisted with a few judicious rubber bands to direct things.

        Telephone coiled cords are not generally intended to pass any significant amount of current, and can be as fine as 32 ga - Ok for a sensor maybe, but not for a servo.

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        • #5
          We are using this: https://smile.amazon.com/gp/product/B00AB2L3MG for servo cabling. The gauge looks to be right (20 or 22 AWG) and the price was reasonable. Shipping was quick. It arrived five days after ordering.

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          • #6
            How about https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

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