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Help powering 12 feedback 360s

AwesomeCronkAwesomeCronk Posts: 832
edited 2019-07-31 - 11:44:30 in Robotics
So, I am making plans for a quadruped spider-bot. It would have four legs(3 dof), with a master prop. I would need a power supply which could supply 50mA to each prop and 500mA to each servo(Feedback 360 units). 1A if they are going to be stalling.

7.5vdc, 12A. Must fit the circuits on a 4in square pcb and the battery can only be a few lbs, as the servos are supporting the whole bot.
Help. Me. Please.

EDIT: fixed this to say one prop instead of five. Thanks PhiPi.
Returning to Spin after two months of not coding micros at all, forgetting to use :=

Comments

  • Phil Pilgrim (PhiPi)Phil Pilgrim (PhiPi) Posts: 22,474
    I'm not sure why you need five Props. I think one would be adequate.

    -Phil
    “Perfection is achieved not when there is nothing more to add, but when there is nothing left to take away. -Antoine de Saint-Exupery
  • AwesomeCronkAwesomeCronk Posts: 832
    You know, I planned on five for 4 DOF legs. Than when I dialed it down to 3 DOF I guess I forgot that one prop could take that.
    Returning to Spin after two months of not coding micros at all, forgetting to use :=
  • Beau SchwabeBeau Schwabe Posts: 6,416
    You shouldn't need 12 Amps either. They don't ALL need to be on at the same time and even if they were they are only actually driving the motor 1/10th of the time in a worst case scenario. I would stagger them over the 20ms signal period so only a few were on at any given time.


    Beau Schwabe --- Robotics applications- PCB design, embedded software, and mechanical
    Oklahoma Robotics -

    www.Kit-Start.com - bschwabe@Kit-Start.com ෴෴ www.BScircuitDesigns.com - icbeau@bscircuitdesigns.com ෴෴

  • tomcrawfordtomcrawford Posts: 1,071
    What language do you plan to use?
    Re-inventing the wheel is not a waste of time if, when you are done, you understand why it is round.
  • AwesomeCronkAwesomeCronk Posts: 832
    @Beau Schwabe That makes sense, I guess I might only need 4 or 5A.

    @tomcrawford I plan to use good old Spin.

    I think I will send pulses to one leg every 5ms and just cycle the updates.
    Returning to Spin after two months of not coding micros at all, forgetting to use :=
  • AwesomeCronkAwesomeCronk Posts: 832
    I just realized how much 12 Feedback 360 servos is going to cost. Oof.
    Returning to Spin after two months of not coding micros at all, forgetting to use :=
  • Keith YoungKeith Young Posts: 569
    lol yup. We've been wanting to teach with Hexapods but those servos add up fast!
    Founder of Kinvert
    https://www.kinvert.com/
  • ercoerco Posts: 19,556
    AwesomeCronk wrote: »
    I just realized how much 12 Feedback 360 servos is going to cost. Oof.

    Quite the AHA moment...!
    "When you make a thing, a thing that is new, it is so complicated making it that it is bound to be ugly. But those that make it after you, they don’t have to worry about making it. And they can make it pretty, and so everybody can like it when others make it after you."

    - Pablo Picasso
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