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AndyMark NeveRest 20 vs Anymark NeveRest 40

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  • AndyMark NeveRest 20 vs Anymark NeveRest 40

    Hello,

    Team 10237 is looking at investing in new motors for this year's season. We are trying to figure out if the NeveRest 20 or 40 is better for the goals this season. Also, we are going to use mecanum wheels. Could you please let us know what the key differences are between the motors are and which you would recommend.

    Here are the links to both motors:

    http://www.andymark.com/NeveRest-20-...-p/am-3102.htm

    http://www.andymark.com/NeveRest-40-...p/am-2964a.htm

    Thanks,
    Everyone from Team 10237
    US ROBOTICS

  • #2
    The choice of motors depends on how you intend to use them. The 20 is basically the same as the 40 but only geared down by half as much. So with a 20 you get twice the speed but half the torque of a 40. 40s are often used for direct drive to 4" wheels whereas 20s would struggle (especially with a heavy robot) because they don't have enough torque to get the robot going fast enough.

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    • #3
      Originally posted by Daniel_10237 View Post
      Hello,

      Team 10237 is looking at investing in new motors for this year's season. We are trying to figure out if the NeveRest 20 or 40 is better for the goals this season. Also, we are going to use mecanum wheels. Could you please let us know what the key differences are between the motors are and which you would recommend.

      Here are the links to both motors:

      http://www.andymark.com/NeveRest-20-...-p/am-3102.htm

      http://www.andymark.com/NeveRest-40-...p/am-2964a.htm

      Thanks,
      Everyone from Team 10237
      US ROBOTICS
      For a Mecanum Drive train, I would use the 40s. If you have used Tetrix motors, the 40s match the speed of them. 20's would most likely be used for intakes and shooters.
      2015 FTC World Champion - Valley X Robotics 2844 - Founding Memeber

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      • #4
        The NeverRest motors are all the same motor. The 20/40/60 versions indicate what gearbox they have on them. We would use 40s for drive train (average torque and average speed), 20s for sweepers and shooters (low torque and higher speeds), and 60s for lifters/extension (slower speed but higher torque). We have also used various Tetrix gear reductions, the Tetrix worm gear, and the Tetrix linear slide (rack and pinion gear).

        It would be good to put the calculations of your robots speed in your Eng notebook. We have an excel sheet that calculates the torque and speed and has the 4 types of motors (NeverRest and Tetrix) with the various sizes of gears that we can get. We also used the calculations to verify that the speed we want matches the gear ratio and motors we have before we put the motors and gears together.

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        • #5
          Keep in mind that these gearboxes are available separately, and are field changeable if you need to adjust your design.

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          • #6
            Originally posted by FTC4217Coach View Post
            The NeverRest motors are all the same motor. The 20/40/60 versions indicate what gearbox they have on them. We would use 40s for drive train (average torque and average speed), 20s for sweepers and shooters (low torque and higher speeds), and 60s for lifters/extension (slower speed but higher torque). We have also used various Tetrix gear reductions, the Tetrix worm gear, and the Tetrix linear slide (rack and pinion gear).

            It would be good to put the calculations of your robots speed in your Eng notebook. We have an excel sheet that calculates the torque and speed and has the 4 types of motors (NeverRest and Tetrix) with the various sizes of gears that we can get. We also used the calculations to verify that the speed we want matches the gear ratio and motors we have before we put the motors and gears together.
            You still got that excel sheet? We're deciding which NeverRest motors to get and could definitely use it...

            Comment

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