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  1. Re: Easy way to smooth Dynamixel Start/Stop motion?

    So would calculateNewPosition function include something like sin? How would I create a function that maps time passed to a sinusoidal velocity profile? Also, would it work best to apply this...
  2. Re: Easy way to smooth Dynamixel Start/Stop motion?

    I'm using usb2ax so direct serial communication
  3. Re: Easy way to smooth Dynamixel Start/Stop motion?

    Ok I understand, though im having some difficulty finding out how I would make my while loop update at 60hz (every iteration of the while loop writes a position). If I want to do it your way, would I...
  4. Re: Easy way to smooth Dynamixel Start/Stop motion?

    So I understand a bit more, I'd do that in something like a while loop in python I guess, but how would one "increasingly" raise the position gaps each iteration? And what if going to say position...
  5. Re: Easy way to smooth Dynamixel Start/Stop motion?

    What do yo mean? could you explain further or give me an example?
  6. Re: Easy way to smooth Dynamixel Start/Stop motion?

    Hello again jwatte and thanks for your response!

    I fear that solution may not work so well since I'm working with AX-12As as well.
  7. Easy way to smooth Dynamixel Start/Stop motion?

    Hey guys, I am using Python and running some dynamixel motors at fairly low maxspeeds (12rpm or so). I am interested in smoothing out the motion at the beginning/end of a write command.
    ...
  8. Re: Would running AX-12A on 14-15V Power Supply Break It?

    How can I make sure it's never over 16V? If I'm using a 15V dc power supply, wouldn't that mean it cant ever go over 16V?

    I am designing for the 1:5. I don't want to make a complex power circuit...
  9. Re: Would running AX-12A on 14-15V Power Supply Break It?

    Alright, I'll try to stick with a 12V dc thanks
  10. Re: Would running AX-12A on 14-15V Power Supply Break It?

    In this document from trossen http://www.trossenrobotics.com/images/productdownloads/dynamixel_guide.pdf it says that he nominal voltage is 11.1-14.8V

    I need every bit of torque I can get out of...
  11. Would running AX-12A on 14-15V Power Supply Break It?

    I want to use a 15V (resistor to 14.8V) power supply to power a MX-28T daisy chained with two AX-12As. I can't think of any good way to power the AX12A's with 12V and the MX-28Ts with 14.8V. Would it...
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    Which ROS release for dynamixel support?

    Hello, I want to do some motion analysis/planning stuff with dynamixel servos, ros and gazebo.

    I'm fairly new to this stuff, what ros distribution will make my life easiest?

    thanks
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    Re: Dynamixel assisted movement?

    okay cheers!
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    Re: Dynamixel assisted movement?

    What do you mean? Sorry.
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    Re: Dynamixel assisted movement?

    The dynamixels aren't being loaded by gravity (planar motion). I should be all good with jwatte's suggestion, right?
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    Dynamixel assisted movement?

    Is there a way, if I have say a link attached to a dynamixel servo, to give a slight "push" to that link and have it assist me moving that link until I let go? Like it senses im trying to rotate/move...
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    Re: Controller for 3DOF MX-64 based arm?

    Alright thanks guys!
  18. Replies
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    Re: Controller for 3DOF MX-64 based arm?

    It sounds like the USB2AX is easier to work with and reduces the amount of electronics a lot. Wouldn't the Arbotix-M be connected via USB too via FTDI? Can you think of any advantages/disadvantages...
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    Re: Controller for 3DOF MX-64 based arm?

    Alright I do have a main computer board, similar to the jetson tk1 - Do you then think arbotix-m is a good user friendly/easily integratable choice as a microcontroller to control 3 or 4 dynamixel...
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    Controller for 3DOF MX-64 based arm?

    I'm looking to create an autonomous 3DOF arm single horizontal plane-oriented arm, and I think I'd like to use ROS for the movement. (Mainly moving the arm to a specified location in a point cloud...
  21. Is it easy to use MX-64/MX-28/AX-12A all together?

    Building an arm using all three of these motors, is the integration/programming going to be a challenge using a servo not in the MX series>
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