Mains motor speed controller

  1. bigegg

    bigegg I drink and I know things. Its what I do.

    Messages:
    6,724
    Location:
    Leeds, West Yorkshire
    I built this to control the speed of my elu mof 96 router, and the oil burner blower, but will work with any motorised tool (afaik! I'm not a lectrickshun :o)

    It's based around a 2000w speed controller from the bay - as well as a small enclosure from screwfix (I think), and a short mains extension.

    I'll post pictures tomorrow when the camera batteries have charged.
     
    anjum likes this.
  2. rtbcomp

    rtbcomp Moderator Staff Member

    Messages:
    18,615
    Location:
    Sheffield UK
    As long as the motor has a commutator and no existing speed controller you should be OK
     
    pdg likes this.
  3. Robotstar5

    Robotstar5 Casanunda Staff Member

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    17,898
    Location:
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    I don't know how they can sell a speed controller for less than a couple of quid including postage from HK :dontknow:
     
  4. Robotstar5

    Robotstar5 Casanunda Staff Member

    Messages:
    17,898
    Location:
    Birmingham
    Probably similar to a digital voltage display that plugs into cigar lighter I bought, £1.69 delivered!.
     
  5. 123hotchef Member

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    8,466
    Location:
    Kent
    perfect for that cheapish die grinder perhaps
     
  6. 123hotchef Member

    Messages:
    8,466
    Location:
    Kent
    4000W even cheaper looks the same http://www.ebay.co.uk/itm/4000W-AC-...ef9b09b&pid=100005&rk=1&rkt=6&sd=171166717259
     
  7. bigegg

    bigegg I drink and I know things. Its what I do.

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    Location:
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    123hotchef likes this.
  8. 123hotchef Member

    Messages:
    8,466
    Location:
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    I bet the other 2000W one is too
     
    bigegg likes this.
  9. bigegg

    bigegg I drink and I know things. Its what I do.

    Messages:
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    Location:
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    004.JPG 005.JPG 006.JPG 008.JPG
     
  10. 123hotchef Member

    Messages:
    8,466
    Location:
    Kent
    nice so it is just like a short extension lead with a controler
     
  11. bigegg

    bigegg I drink and I know things. Its what I do.

    Messages:
    6,724
    Location:
    Leeds, West Yorkshire
    basically, yes.

    I was going to put a trailing socket but the cheapanese extension I had overheated and melted the socket :o so I replaced it with the pattress box.
     
    123hotchef likes this.
  12. 123hotchef Member

    Messages:
    8,466
    Location:
    Kent
    good idea it woks and you can use it for other things too
     
    bigegg likes this.
  13. slim_boy_fat

    slim_boy_fat Forum Supporter

    Just ordered a 4000W one to try on the Myford when I'm ready. For the princely sum of £1.24 it's hard to go wrong, even if it ends up in the bin. :cool:
     
    FoxZulu and bigegg like this.
  14. FoxZulu

    FoxZulu Member

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    115
    Location:
    London, UK
    £1.24!!! That's crazy money. Think I'll start saving up:thumbup:
     
    slim_boy_fat and 123hotchef like this.
  15. Shox Dr

    Shox Dr Chief Engineer to Carlos Fandango

    Messages:
    14,207
    Location:
    East Yorkshire
    I think you'll find it's useless, as other have said to chops the voltage

    Less volts= less power= no torque. No worky

    Hence why 3ph motors are used in conjunction with a vfd
     
    slim_boy_fat likes this.
  16. tommullin

    tommullin Member

    great for LEDs though. you could make a decent cheap dimmer switch
     
    123hotchef likes this.
  17. mechman Member

    Messages:
    1,737
    Location:
    great britain n.e.lincs
    Er, that's about a half a pint of ale lads, so think on before making a rash decision.
     
    slim_boy_fat and 123hotchef like this.
  18. eddie49 Member

    slim_boy_fat:
    "Just ordered a 4000W one to try on the Myford when I'm ready."
    As others have said, this type of TRIAC-based phase angle speed controller will only work for a "universal" motor - i.e. the noisy ones with brushes and a commutator - not with an induction motor. So it will not work on your Myford.
     
  19. slim_boy_fat

    slim_boy_fat Forum Supporter

    Thanks. :thumbup: Oh well, no great loss and I'll possibly find another use for it. :doh:
     
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