Gear Train

  1. 6 months ago

    Can anyone suggest a gear train for a ball throwing robot that would have maximum speed?

    Our team used 35:1 4-motor speed for a full-court shooter at worlds, flywheels need more speed than you'd expect.

    Compression of the balls (especially if using foam balls like NBN) is also really important; without the proper spacing for the type of ball, even the fastest flywheels won't be able to shoot very far.

  2. Robo_Eng_13

    10 Jan 2018 Indiana 1483

    @fionayetari Can anyone suggest a gear train for a ball throwing robot that would have maximum speed?

    All the gears do is change what ratio of the input power comes out as torque and speed. For max speed, you want the minimum amount of torque necessary to accelerate your payload to the speed achievable by the remaining power.

    Or rev up and engage a flywheel.

  3. briancole

    10 Jan 2018 Utah 4270C

    Big gear attached to the motor, small gear attached to the thing that's driven. For a flywheel, I would guess you should use around 5:1, but I didn't play nbn, so that's just a guess.

  4. Easton

    10 Jan 2018 GA, USA 1958A

    @briancole Big gear attached to the motor, small gear attached to the thing that's driven. For a flywheel, I would guess you should use around 5:1, but I didn't play nbn, so that's just a guess.

    We built one with a 40:1 gear ratio for a physics project, and it didn't shoot super hard. 5:1 won't launch a tennis ball more than a foot or two probably

  5. Archimedes

    10 Jan 2018 Shadesmar Beijing 6969

    That's a tennis ball, we are talking about nbn balls I assume?

  6. briancole

    10 Jan 2018 Utah 4270C

    Yeah. As i said, though, it was an estimate.

  7. Edited 6 months ago by discovery

    Our team used 35:1 4-motor speed for a full-court shooter at worlds, flywheels need more speed than you'd expect.

    Compression of the balls (especially if using foam balls like NBN) is also really important; without the proper spacing for the type of ball, even the fastest flywheels won't be able to shoot very far.

  8. 1961Uranium

    11 Jan 2018 Georgia, United States Blitz Alliance 1961U
    Edited 6 months ago by 1961Uranium

    1:25 or 1:21 was a good way to go nbn year with 4 motors

  9. Thank you all of this helps so much.

 

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