Old woodturning lathe AC motor control

Discussion in 'General Electronics Chat' started by Ron Pflaumer, Jan 21, 2015.

  1. Ron Pflaumer

    Thread Starter New Member

    Jan 21, 2015
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    [​IMG]

    I have a very elderly ELF lathe with a small-ish AC motor. The BROOK motor starter packed up although pressing the electromagnetic slider in will run it until released. I'd really like to replace the starter unit with something much more modern which will include a simple speed dial too. RS-components seem to stock some very expensive alternatives but I thought perhaps I could build an alternative. I am a retired research tech with a little electrical/electronic experience and can follow a circuit diagram. Would anyone be willing to advise?
     
  2. Kermit2

    AAC Fanatic!

    Feb 5, 2010
    3,795
    951
    most people change over to 90 VDC permanent magnet motors for these upgrades. continiously variable speed and more torque at low speeds vs AC motors with thyristor control schemes. google up lathe motor upgrades. there are many good examples
     
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  3. Ron Pflaumer

    Thread Starter New Member

    Jan 21, 2015
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    Wow. Thanks for such a speedy response. Will look at the options you suggest.
     
  4. MaxHeadRoom

    Expert

    Jul 18, 2013
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    If going DC, the TreadMill motors offer a good alternative together with KB drives, both can be had resonably on ebay.
    Also see the CNCzone.com.
    Max.
     
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  5. Ron Pflaumer

    Thread Starter New Member

    Jan 21, 2015
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    Thanks Max, will look for treadmill motors. One or two on ebay UK so far.
     
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