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Super high torque servos? — Parallax Forums

Super high torque servos?

Miles. kMiles. k Posts: 34
edited 2010-03-02 00:17 in General Discussion
The idea came to me to make a robot out of a ATV. For throttle i could just use a normal servo but to steer i think i need some more power. like a GIANT servo
Any idea's?

Thanks,
Miles

Comments

  • kwinnkwinn Posts: 8,697
    edited 2010-02-24 03:58
    A large stepper with a potentiometer for positioning. Use a 10 turn pot and have the stepper make 8-10 turns to move the steering over it's range of motion. If you need more torque you could put a 1 turn pot on the steering handle.
  • W9GFOW9GFO Posts: 4,010
    edited 2010-02-24 04:07
    Maybe the K2X-G05?

    Rich H

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
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  • kf4ixmkf4ixm Posts: 529
    edited 2010-02-24 04:47
    here's one that can lift 100lb, that should be enough for steering i would think...

    http://www.pololu.com/catalog/product/1390

    0J1904.200.jpg?1256953500
  • W9GFOW9GFO Posts: 4,010
    edited 2010-02-24 05:03
    kf4ixm said...
    here's one that can lift 100lb, that should be enough for steering i would think...

    http://www.pololu.com/catalog/product/1390

    That is an impressive servo, but it is only 8 ft-lbs of torque, I think you would need something more rugged for an ATV.

    The linear actuator, if mounted 2" from the axis of rotation, would have 100 ft-lbs of torque and would be essentially immune to shocks.

    Rich H

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    The Simple Servo Tester, a kit from Gadget Gangster.
  • LoopyBytelooseLoopyByteloose Posts: 12,537
    edited 2010-02-28 13:55
    There are limits to what a pwm servo is intended to do -- stepper motors can go much, much higher in torque and are used on CNC lathes and milling machines for such purposes, so are even set up as linear actuators.

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    aka G. Herzog [noparse][[/noparse] 黃鶴 ] in Taiwan
  • Agent420Agent420 Posts: 439
    edited 2010-03-01 14:20
    Can't remember where I first saw this, but I note several people have sucessfully converted automotive windshield wiper motors into powerful servos...

    http://www.fieroaddiction.com/servo.html



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  • logan996logan996 Posts: 281
    edited 2010-03-01 22:14
    well if your not going to be too right to the point sensitive, couldnt you just buy some heavy duty motor and connect it to the HB- 25's you used in your last project? (which rocked [noparse]:D[/noparse] )

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  • ercoerco Posts: 20,260
    edited 2010-03-02 00:17
    https://www.servocity.com/html/spg785a-4_5_servo_gearbox.html

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