Large Drummond Restoration

  1. KaneH Member

    Messages:
    197
    United Kingdom
    She’s in!

    Now just to rebuild it and sort out some power :clapping:
     
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    barking mat, zx9, Seadog and 6 others like this.
  2. KaneH Member

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    197
    United Kingdom
    Had a quick look tonight and appears the motor is a 400v 3ph unit (1hp). Any suggestions on the best and affordable way to get this up and running off of a single phase supply?
     
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  3. eLuSiVeMiTe

    eLuSiVeMiTe Member

    Messages:
    12,124
    Location:
    Bedfordshire England
    Shows star and Delta on the plate. Looks like 240v but can't quite make out.

    If so a cheap vfd and off you go.
     
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  4. Seadog

    Seadog Forum Supporter

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    Are you sure? I think that's wishful thinking. I can't see anything stamped for the Delta.
     
  5. KaneH Member

    Messages:
    197
    United Kingdom
    Had another quick clean. Definitely no number next to the delta, only the 400 above.
     
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  6. eLuSiVeMiTe

    eLuSiVeMiTe Member

    Messages:
    12,124
    Location:
    Bedfordshire England
    Probably is wishful. Could almost make out a 2 and a four.

    What's the connector box look like.
     
  7. KaneH Member

    Messages:
    197
    United Kingdom
    Switch and connectors block..
     
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  8. slim_boy_fat

    slim_boy_fat Forum Supporter

    I'm sure I spotted a 240V one which looks identical on Faceslap this morning, listed in Inverness.
     
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  9. KaneH Member

    Messages:
    197
    United Kingdom
    Got a link Slim?

    Having little experience with electronics I’ve been looking through the web for info on inverters and found an article on inverter drive, see below:

    https://inverterdrive.com/HowTo/240V-Supply-to-a-400V-AC-Motor/

    Am I correct in saying that I could run the motor via an inverter at 230v 3ph albeit only achieving half speed (full torque)? Or does the motor require the 230v stamp on the delta as discussed above for this to be achievable?

    My thought was to potentially change the speed at the lathe via a secondary pulley setup. Shout now if I’m talking nonsense!
     
  10. spencer 427 Member

    Messages:
    6,925
    Location:
    uk colchester
    Wouldn't it be easier to just run a single phase motor. Plenty of them about a will produce more than enough grunt for the size of the machine you have
     
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  11. slim_boy_fat

    slim_boy_fat Forum Supporter

    KaneH likes this.
  12. KaneH Member

    Messages:
    197
    United Kingdom
    That’s a decent price there Slim, thanks. Anyone local to Inverness that could potentially pick this up and hold onto it until I’m up north next? Beer tokens awaiting
     
  13. Pete.

    Pete. Member

    Messages:
    9,427
    Location:
    Kent, UK
    Before spending any money first take the connection box cover off the motor and look at the arrangement. Just because they don't list delta as a configuration doesn't mean the facility is not there.
     
    KaneH likes this.
  14. KaneH Member

    Messages:
    197
    United Kingdom
    Will have a look tonight Pete but potentially £30 for a motor that will run out of the box could be a saving compared with buying a inverter for the 3 phase unit. Not sure what I’m looking for in the connector box but will post photos later for some advice.
     
  15. Seadog

    Seadog Forum Supporter

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    Regardless of the small difference in cost, the versatility that running a VFD provides is worth the expense.
     
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  16. KaneH Member

    Messages:
    197
    United Kingdom
    Not sure what I’m supposed to be looking for but here’s a few snaps..

    First - top cover removed on motor

    Second - top cover removed on control box

    Third / fourth - plug
     
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  17. slim_boy_fat

    slim_boy_fat Forum Supporter

    I could if it comes to that [there's another Member closer but I can't remember his username], he may pop up soon.....

    Check that it's going to be powerful enough for "a large Drummond", at an output of 180W - the ad says "suitable for a small lathe" :dontknow:
     
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  18. eLuSiVeMiTe

    eLuSiVeMiTe Member

    Messages:
    12,124
    Location:
    Bedfordshire England
    All mine will go that way in the end.

    1.5hp and a cheap vfd.

    Screenshot_20191002-205117.png Screenshot_20191002-205032.png
     
  19. Seadog

    Seadog Forum Supporter

    Messages:
    6,466
    Location:
    NE London - UK

    Which shows what we'd normally expect to see with a 3-phase star configured motor. That is just three wires.

    Without going to the expense of a 415v vfd you'd need to open the motor to find the star point so that it can be reqired for 230v delta operation.
     
    KaneH likes this.
  20. KaneH Member

    Messages:
    197
    United Kingdom
    I’d briefly read about this yesterday. Has anyone on here done a write up on here if the procedure? Or are there any guides online that take you through it?

    I’m happy enough to follow instructions but wouldn’t know where to start without any guidance
     
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