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Thread: DC Motor Power Supply/Controller?

  1. #1
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    Default DC Motor Power Supply/Controller?

    OK, so the tinkering bug has bit, and I've decided to build a sander/grinder.

    Of course, I'd like to build a Jeremy Schmidt, but my metalworking mojo is simply not there.

    Yet.

    I scored a treadmill offa Craigslist for the steel and the motor/drive.

    It was free because it only runs for a few seconds before it displays an ErroR and shuts down.

    I have no electronics skills whatsoever, so I have stripped off the circuit boards.

    The way I see it, I should be able to get an adapter and a motor controller for dirt cheap if only I knew what I was looking for!

    The motor is 1.5 HP, 120VDC, and I need to run it off 120VAC. Variable speed is pretty much mandatory, IMO.

    I spent an hour on Google, Amazon and Ebay last night, and what I came up with ranged between $2k and $4K.

    A little rich for my blood.

    Do I need to wait for another treadmill that works right?

    What sort of gizmo should I be looking for? I have found that one can find just about anything on Google if only one knows what search terms to use.
    Rattling the teacups.

  2. #2
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    Default Re: DC Motor Power Supply/Controller?

    Simpler is better, except when complicated looks really cool.

  3. #3
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    Default Re: DC Motor Power Supply/Controller?

    Excellent!
    Rattling the teacups.

  4. #4
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    Default Re: DC Motor Power Supply/Controller?

    grainger has a good searchable database with multiple filters for input/output volts and amps, etc. . .
    you may find it useful to narrow your search

    https://www.grainger.com/search/moto...sst=1&optOut=0
    Simpler is better, except when complicated looks really cool.

  5. #5
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    Default Re: DC Motor Power Supply/Controller?

    Thanks, Paul.
    Rattling the teacups.

  6. #6
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    Default Re: DC Motor Power Supply/Controller?

    so is this gonna be a knife grinder/linisher?
    Simpler is better, except when complicated looks really cool.

  7. #7
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    Default Re: DC Motor Power Supply/Controller?

    Quote Originally Posted by Paul Pless View Post
    so is this gonna be a knife grinder/linisher?
    Yes . . .

    I guess.
    Rattling the teacups.

  8. #8
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    Default Re: DC Motor Power Supply/Controller?

    That item you linked is incredible.

  9. #9
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    Default Re: DC Motor Power Supply/Controller?

    Quote Originally Posted by bluedog225 View Post
    That item you linked is incredible.
    You mean the Jeremy Schmidt 2 x 72 sander/grinder?

    Yes.

    A thing of beauty.

    That kid keeps making attachments for it, too.

    AND, it's not like they're 'attachments', you know?

    He can go from a vertical platen to a horizontal in about 2 seconds. From the platen to a contact wheel or to any other configuration in about 10 seconds.

    VERY carefully made, EVERY part adjustable . . . If I were rich, I'd buy one to stand in the corner of the living room.

    With all the 2" bar stock he's got in that thing, with the stand and all, I'll bet it goes over 300 pounds.

    https://www.youtube.com/watch?v=a_RlL1O-bK4
    Rattling the teacups.

  10. #10
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    Default Re: DC Motor Power Supply/Controller?

    What was the power source for the original device at 120V DC?
    I would rather have doubt than be certain and wrong.
    Richard Feynman.

  11. #11
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    Default Re: DC Motor Power Supply/Controller?

    Quote Originally Posted by Stiletto View Post
    What was the power source for the original device at 120V DC?
    Uhhhh . . .

    I plugged it into 120VAC, the circuit board did its electromagical dance, and the dang thing started turnin'!
    Rattling the teacups.

  12. #12
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    Default Re: DC Motor Power Supply/Controller?

    you should be getting plenty of advertisements for ac/dc tranformersand motor controllers scrolling across the bottom of your woodenboat screen today

    i know i am
    Simpler is better, except when complicated looks really cool.

  13. #13
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    Default Re: DC Motor Power Supply/Controller?

    Quote Originally Posted by Paul Pless View Post
    you should be getting plenty of advertisements for ac/dc tranformersand motor controllers scrolling across the bottom of your woodenboat screen today

    i know i am
    I should unblock the ads, just to see what's what!

    I grabbed another treadmill offa Craigslist, BTW, this one wants 135VDC and makes 2.5 hp. Its controller is working just fine.


    One unexpected bonus from this little adventure is the little gear motors that elevate/lower the incline.

    They are 120VAC, and make 400 pounds of thrust. Complete with jack screw.

    Another bonus is the treadmill belts. They are going to make EXCELLENT drawer liners!
    Rattling the teacups.

  14. #14
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    Default Re: DC Motor Power Supply/Controller?

    Quote Originally Posted by oznabrag View Post
    Another bonus is the treadmill belts.
    you might make a shop built veneer thickness drum sander

    you know, for the future luthier in you
    Simpler is better, except when complicated looks really cool.

  15. #15
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    Default Re: DC Motor Power Supply/Controller?

    Quote Originally Posted by Paul Pless View Post
    you might make a shop built veneer thickness drum sander

    you know, for the future luthier in you
    If someone tells you or someone you love to 'find what you love and make a living at it', please give them a solid, right hook to the head for me, yes?

    The thought of making just about anything out of wood makes me physically ill, anymore.
    Rattling the teacups.

  16. #16
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    Default Re: DC Motor Power Supply/Controller?

    Quickly now, to the AluminiumBoat Forum!
    Simpler is better, except when complicated looks really cool.

  17. #17
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    Default Re: DC Motor Power Supply/Controller?

    Quote Originally Posted by Paul Pless View Post
    Quickly now, to the AluminiumBoat Forum!
    I still sorta want to make boats outta wood, so I have that going for me.
    Rattling the teacups.

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