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  1. #61
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    Quote Originally Posted by Stustoys View Post
    Hi Ts,
    Good to see you're up and running.


    Well at least in part, it is running on 240V single phase input. But the more interesting part is what the output is, it was always going to run regardless. The question is, does it have 750W or only 300ishW.



    Stuart

    Hi Stuart.
    exactly . hence my question regarding how the motor run.

    Peter

  2. #62
    BobL is offline Member: Blue and white apron brigade
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    From what I can see the motor has been left in star winding connection mode otherwise there would be a pair of wires from the inside of the motor coming back to each connection point.
    This means it will only generate 1/2 the power therefore restricting the usable power band.

    This is a problem for machines like DPs and lathes etc the slower speeds are usually where the greatest power is needed but as TS mentioned he is a woodworker so it might work out for him.

  3. #63
    Join Date
    Mar 2006
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    Melbourne
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    13

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    BobL is correct it was left in star winding and yes I am a woodworker.

    I hope to have the drill press fully restored in a month.

    At that point I will run the drill press through its paces, drilling assorted size holes in assorted timbers.

    Then we can see in real terms if sticking with the three phase motor and pairing it with the VFD was a good idea or not.

  4. #64
    BobL is offline Member: Blue and white apron brigade
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    The areas where I can see problems is in large holes using spade/Forstner bits and when using hole saws.
    Even at full power (i.e. @ 50Hz) and set on the optimum pulley parings, with only a 3/8HP it will struggle.
    But as you say, nothing beats trying it out and in the meantime a bigger and better motor may come along which will save the trouble of conversion.

    FWIW I waited for over a year for my 1.5HP Leeson motor to come along. It did not need any delta to star conversions as it was dual connect at the terminal box. It's a great little motor and I am glad I waited for it.

  5. #65
    Join Date
    Jul 2010
    Location
    Melbourne
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    Quote Originally Posted by BobL View Post
    This means it will only generate 1/2 the power
    You're assuming 240V output. You may well be right. To the OP its going to sound the same either way unloaded.
    I wonder if being a vector drive can make up for some of the lost power(assuming it is infact 240V output)

    Stuart

  6. #66
    BobL is offline Member: Blue and white apron brigade
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    Quote Originally Posted by Stustoys View Post
    You're assuming 240V output. You may well be right. To the OP its going to sound the same either way unloaded.
    I wonder if being a vector drive can make up for some of the lost power(assuming it is infact 240V output)

    Stuart
    OK - forgot about these.
    Vector VFD gives 10-15Hz wider range at lower end.

  7. #67
    Join Date
    Aug 2007
    Location
    Melbourne
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    1,410

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    have restored a Waldown 8S too. initially I did also restore and repaint the original 1ph 1HP motor. But before putting all back together, I decided to uprade to VFD. I used a 240V V/Hz type 1HP Lenze VFD (which I already had), and bought a new 1HP 3ph CMG motor to go with it. I am very happy with performace.

    I suggest the OP keeps his 3/4HP VFD, and gets a new 3/4HP 3ph 4-pole 240V motor to suit. 3ph motors are really the cheapest motors there are. There are usually some new ones on eBay for $ 80 to 90. They are chinese made - but so what, the CMG I have is made in China too, so I was told by the motor rewing shop I bought it from. Fitting to the Waldown was no problem, If I remember well I may have had to bore the pulley a bit larger because the original motor was imperial and the new one was metric:
    http://www.woodworkforums.com/showth...89#post1799189

  8. #68
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    Jul 2010
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    Melbourne
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    Quote Originally Posted by cba_melbourne View Post
    I suggest the OP keeps his 3/4HP VFD, and gets a new 3/4HP 3ph 4-pole 240V motor to suit.
    Well that could be interesting to watch if you've guessed wrong.

    Stuart

  9. #69
    Join Date
    Jun 2005
    Location
    Helensburgh
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    618

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    Quote Originally Posted by thumbsucker View Post
    I have made progress with the VFD and my motor. Thanks allot to NCArcher who helped me via email. The process was relatively simple thanks to plain & simple instruction from NCArcher.

    End the end the motor worked fine without need to make any changes. There was no need to add a 20 amp circuit to the house.

    All I needed to do was purchase some 400 volt rated round lugs and forked lugs and good crimper. It took about 20 minutes and the VFD started up then I simple pressed run and the motor started up. The next step is to program the VFD. Here are some photos.

    Tony is the got to guy for this stuff and has never failed to solve any VFD related issues put to him in my experience. He actually is a qualified expert in this field.
    CHRIS

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