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Thread: Would this variable speed controller work?

  1. #21
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    Chef Niloc's Avatar
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    Quote Originally Posted by BurkeCutlery View Post
    Colin, is your home/shop wired for 3 phase?
    Yes

    I know I can just get a new motor but I'd rather wate to upgrade to a bigger grinder befor I do. Just trying to see it there was a way to hook up a VFD to the one I have for under $300.00

  2. #22

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    With a little searching 300 might get you a vfd and a motor (here's a vfd for ~150: Link).

  3. #23
    Hobbyist Craftsman Hattorichop's Avatar
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    Another one to check out may be the optidrive e2. Single phase input and single phase output.
    VFD rated for 1/2hp sells for $410.

  4. #24
    Hobbyist Craftsman Hattorichop's Avatar
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    Colin, sorry for giving you hope in a cheap option. This was another product of me not reading the context fully before making an opinion. I just saw the motor ratings and totally skip over the motor type.

    Good luck in your quest.
    BTW We still do not know what you are trying to achieve with this.

  5. #25
    Mike Davis's Avatar
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    ebay can be your friend. I have found motor/vfd combo's for around $300. Just takes a butt load of searching lol.

  6. #26
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    I have a kalamazoo 1sm belt sander that I would like a variable speed control on. The motor spc. I posted is the motor that it came with. I have had this thing for 5-6 years now, made a few cool mod's to my self and it's a good little grinder. It's easy to move around and doesn't take up much space. Even if/ when I get a bigger grinder I think I would still find it to be useful. So I wouldn't mind putting a few $100.00 into it. It would also be nice to run it in reverse (motor can handle that, I checked). A VDF would be ideal I think, but I would settle for just being able to slow the belt down. Since its a 2 wheel grinder with the Drive wheel directly attached to the motor I don't think a step pulley is a option? Not without relocating the motor, making a mounting plate ext. that would make the whole unit bigger thus taking away from it being easy to move. It has a 4" drive wheel that I was thinking about just changing out for a smaller one, but 3.75/3.5" is as small as I could go tops without it screwing up the belt ran. It would not clear the space that the belt runes to the platen. I also don't know if 1/4-1/2" reduction in wheel size would give me a noticeably reduction in speed?
    Other options that I'm not thinking of? Or is there a controller that would work on this motor?
    Quote Originally Posted by Hattorichop View Post
    Colin, sorry for giving you hope in a cheap option. This was another product of me not reading the context fully before making an opinion. I just saw the motor ratings and totally skip over the motor type.

    Good luck in your quest.
    BTW We still do not know what you are trying to achieve with this.

  7. #27
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    Quote Originally Posted by Rottman View Post
    With a little searching 300 might get you a vfd and a motor (here's a vfd for ~150: Link).
    With that vfd I would still need a deferent motor, or would that work on the one I have?

  8. #28
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    If I got a dc motor that fit right I would just need a ac/dc converter and cheep voltage controller, right? Or would I lose torc power going this route thus running into a problem with the motor staling?

  9. #29
    Mike Davis's Avatar
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    hmmm....I am looking into this. I might call Kalamazoo direct, as they are almost local to me(40 min west) and see what their thought's are on this.

  10. #30
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    If you are ok with a set lower speed, the 3.5" wheel compared to the 4" by my calculation of the circumference of the wheels, would reduce your speed from the rated 1800 SFPM to 1584 SFPM or a 12% reduction. (disclaimer: I'm Not a math major)LOL.

    Glen

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