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please help

Discussion in 'SimTools compatible interfaces' started by ryisnelly, Jun 6, 2011.

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  1. bsft

    bsft

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    No, you will need this one http://www.pololu.com/catalog/product/1393 it has feedback and will handle quite a bit of current, up to 30 amps.
    They are a tough little sucker. I run mine at 22.5 amp max current error. You will need heatsinks and a cooling fan on them. Granted it doesn't run up to that all the time, however, the motors change direction constantly and are sucking spikes of current to do so. An example is an air conditioning compressor. I have a 9kw unit. At start up it spikes at 71 amps for about 1/2 a second and them draws 12-15 amps after that at 240 volts. So remember that your motors are doing a similar thing changing direction. I run two psu that have 12 v at 25 amps max output each. One for each motor.
    :cheers:
    bsft, Jun 7, 2011
    #21
  2. bsft

    bsft

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    1), no I didn't change the motor terminals, if the motor moved the wrong way, I reverse direction in the pololu utility program for the board.
    2) for pot setup, first, refer to this picture

    gallery/image_page.php?album_id=92&image_id=391

    Remember that a single turn pot has only 270 deg of movement and a motor has 360. My pot only turns about 90 deg. Turn the pot to one side and then back a bit, then move the lever-motor arm that side as well.
    3) For motor placement, if you are referring to pot placement, look at the photos. I moved my pot lever setup from one side of the motor arm to the other and ran the motor on straight 12v until I found a good lever action going. It will take some experimentation.
    bsft, Jun 7, 2011
    #22
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