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Thread: Good for lumia??

  1. #21
    Join Date
    Jun 2009
    Location
    St. Louis, MO
    Posts
    806

    Default

    I've done lumia with a stepper, 25:1 gearing, and a < $10 ministeping driver that was smooth as silk even at barely perceptable speeds. (Seriously, you had to stare at in to see see that it was moving at all.) And I'm as critical as hell, ask anybody...

    The only problem is - I've got about 40 of the prettest little Olympus brushless DC motors with 1000:1 planetary gear heads that are way better than the Escap motors that we used for Laserium, and I don't need them anymore... sigh
    "There are painters who transform the sun into a yellow spot, but there are others who, with the help of their art and their intelligence, transform a yellow spot into the sun." Pablo Picasso

  2. #22
    Join Date
    Aug 2009
    Location
    Churchill(hour S from Houston)
    Posts
    1,297

    Default THANK YOU

    Quote Originally Posted by laserist View Post
    I've done lumia with a stepper, 25:1 gearing, and a < $10 ministeping driver that was smooth as silk even at barely perceptable speeds. (Seriously, you had to stare at in to see see that it was moving at all.) And I'm as critical as hell, ask anybody...

    The only problem is - I've got about 40 of the prettest little Olympus brushless DC motors with 1000:1 planetary gear heads that are way better than the Escap motors that we used for Laserium, and I don't need them anymore... sigh
    xxxxxxxxxxxxxxxxxx
    thank you very much-- these are incredible little motors.. kind of you to give them.
    hak
    BEYOND-FB3/APC40Mamba Black(clone & currently on loan) 2X 5paghetti & 2 I-Show 2X KGB 1000mW 532 DT40K (pair)XFX 1300 RGB full color RGB 30K DIY 3.5WRGB work in progress et al..assorted ttl chi-jectors--LOTS of LUMIA DIY pjs-
    Powered by Pangolin & ILDA Member

  3. #23
    Join Date
    Jun 2009
    Location
    St. Louis, MO
    Posts
    806

    Default

    Quote Originally Posted by hakzaw1 View Post
    xxxxxxxxxxxxxxxxxx
    thank you very much-- these are incredible little motors.. kind of you to give them.
    hak
    You are welcome.
    "There are painters who transform the sun into a yellow spot, but there are others who, with the help of their art and their intelligence, transform a yellow spot into the sun." Pablo Picasso

  4. #24
    Join Date
    Apr 2009
    Location
    North of Jackson Michigan USA
    Posts
    305

    Default

    Quote Originally Posted by hakzaw1 View Post
    xxxxxxxxxxxxxxxxxx
    thank you very much-- these are incredible little motors.. kind of you to give them.
    hak
    Are there any left?

    ...Mike
    Runs with Lasers

  5. #25
    Join Date
    Jun 2009
    Location
    St. Louis, MO
    Posts
    806

    Default

    Quote Originally Posted by clickamouse View Post
    Are there any left?

    ...Mike
    There are, but as BLDC motors you have to build a driver. I sent a couple of driver chips. (I picked them up years ago before they became 750 unit min order qtys, and I have fewer than I have motors. They require 6 external transistors - 2 for each coil and they're surface mount - so bread boarding is tedious.) Speed control can be done badly with input voltage and better by strobeing the driver chip to PWM the drive signal. Doing something close to 0-100% duty cycle requires a dual 555 circuit, or something equally involved. And I suggested he post his experiments...
    "There are painters who transform the sun into a yellow spot, but there are others who, with the help of their art and their intelligence, transform a yellow spot into the sun." Pablo Picasso

  6. #26
    Join Date
    Apr 2009
    Location
    North of Jackson Michigan USA
    Posts
    305

    Default

    Gotcha, thanks.

    ...Mike
    Runs with Lasers

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