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  1. #16
    Join Date
    Oct 2010
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    NSW
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    124

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    Thanks Joe, that's what I suspected. Oh well, I'll just keep using it the way I have been. I must admit I don't miss the things I've never had.

  2. #17
    Join Date
    Feb 2009
    Location
    jilliby nsw
    Age
    67
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    105

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    Just wondering if a 3 phase motor running on 240v single phase via a VFD can be made reversible?? or do I convert to single phase reversible?? What would be the simplest electrical guru's. Thanks for your wisdom & input

  3. #18
    Join Date
    Nov 2007
    Location
    Near Rockhampton
    Posts
    236

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    Quote Originally Posted by hpa1 View Post
    Just wondering if a 3 phase motor running on 240v single phase via a VFD can be made reversible?? or do I convert to single phase reversible?? What would be the simplest electrical guru's. Thanks for your wisdom & input
    Same as a 3 phase input VSD. Reversed either with a parameter selection in the drive or swap any 2 of the motor connections.

  4. #19
    BobL is online now Member: Blue and white apron brigade
    Join Date
    Feb 2006
    Location
    Perth
    Posts
    5,936

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    Quote Originally Posted by GuzziJohn View Post
    Same as a 3 phase input VSD. Reversed either with a parameter selection in the drive or swap any 2 of the motor connections.
    Most also have a Rev switch on the front of the VFD.

  5. #20
    Join Date
    Apr 2012
    Location
    Healesville
    Posts
    1,632

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    Good one steve, i had wondered when you were going give that thing a test run.

    I have a 7.5 hp motor on my lathe running off a 415 - 415v vfd about the same physical size as the one that steve has, it looks too small to do what it does. It fitted nicely into the electrical cabinet on the back of the lathe so i fitted a fan and air vent and a temp controller and fixed the sensor to the fan outlet of the vfd. The strange thing is that the vfd barely ever gets over ambient temperature.... and it only cost 140 bucks on ebay...

  6. #21
    Join Date
    Aug 2008
    Location
    near Rockhampton
    Posts
    5,993

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    Quote Originally Posted by Poloris View Post
    I have just purchased one for my Hafco GHD-22 drill press, which I have been running on 240v via a VSD (little torque).
    Because of the Black Friday Sale I was able to buy it 13% cheaper.
    Thank you for the info and website link.
    Mark

    I have downloaded the english manual from

    http://www.cnweiken.cn/upload/files/...3671807847.pdf
    Have you got your yet? Freight times are pretty slow. Mine has just made it to Sydney.
    Gold, the colour of choice for the discerning person.

  7. #22
    Join Date
    Aug 2004
    Location
    Perth Western Australia
    Age
    62
    Posts
    143

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    R.C I'm still waiting, however I have been notified that a delivery is pending.

    Mark
    I've become a tool of my tools.

  8. #23
    Join Date
    Sep 2008
    Location
    Riddells Creek, Vic.
    Posts
    613

    Default

    I picked mine up from the post office today.

  9. #24
    Join Date
    Aug 2009
    Location
    Lara, Vic, Oz
    Posts
    29

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    Picked my one up yesterday too, looks pretty good, impressed with the compact size, now to put it to work on the lathe!
    Cheers
    Si

  10. #25
    Join Date
    Oct 2008
    Location
    Cairns, Q
    Posts
    625

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    My apologies for clicking on the request for pictures in the initial post. I meant to click on "Like this post". Pictures in that post are fine, and thanks for the review.

    From your description I will consider buying one next time (if ever) I have the opportunity to buy a good value machine with a three phase 415V motor, something I have avoided in the past because it is not financially practical to connect 3 phase to my shed, and a perceived idea that the VFDs previously available require at least some technical expertise to set up. From your description it sounds as though this one is relatively foolproof to set up if it worked straight out of the box. Where electric/electronic equipment is involved I rate fairly on the scale of fools, so would be a good test case!

    I have toyed with the idea of buying a VFD in the past, but only one of perhaps 7 or 8 electricians who have done domestic work here at home admitted to a little experience with VFDs. Twenty five years ago when I was still working in sugar mills I was friendly with a couple of mill electricians who would have been very familiar by now with such equipment: alas, both have inconveniently died in the last few years.

    Frank.

  11. #26
    Join Date
    Nov 2017
    Location
    Geelong, Australia
    Age
    54
    Posts
    1,454

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    Thanks Frank.
    There's very little config to be done on these ones out of the box to get to the point where you've got a motor running on the standard 50Hz frequency. From there, tweaking minor settings such as acceleration and deceleration times is easy too.
    It does get a bit more technical when you start to get into using external controls and switching etc, and then another step up in difficulty if you want to integrate it into the original controls on a machine.
    The simplest scenario is where you have a machine with a single motor and on/off switch. In that situation you can just ignore the on/off switch on the machine and connect the VFD directly to the motor and supply and use the controls on the VFD panel itself.

    Steve

  12. #27
    BobL is online now Member: Blue and white apron brigade
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    Feb 2006
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    Perth
    Posts
    5,936

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    Quote Originally Posted by OxxAndBert View Post
    The simplest scenario is where you have a machine with a single motor and on/off switch. In that situation you can just ignore the on/off switch on the machine and connect the VFD directly to the motor and supply and use the controls on the VFD panel itself.
    It's not only the simplest scenario it is also the safest scenario for both the VFD and the motor. Unless suitable precautions are taken there should be no switches between the motor and VFD. Turning the motor off under load using a switch between the Motor and VFD can blow components in the VFD and can damage the insulation in the motor.

  13. #28
    Join Date
    Aug 2008
    Location
    near Rockhampton
    Posts
    5,993

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    Mine turned up today.

    I wonder if the big capacitors are the main components in the increased voltage.

    20210115_110915.jpg
    Gold, the colour of choice for the discerning person.

  14. #29
    Join Date
    Nov 2017
    Location
    Geelong, Australia
    Age
    54
    Posts
    1,454

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    Quote Originally Posted by .RC. View Post
    Mine turned up today.

    I wonder if the big capacitors are the main components in the increased voltage.

    20210115_110915.jpg
    Yours is the 4kW version .RC. ?

    I just received another 2.2kW one today and it doesn't have the big caps like that, so I suspect they are probably related to the extra current through yours, to keep the DC side smooth.
    I think my new one will end up on the T&C grinder....

    Steve

  15. #30
    Join Date
    Aug 2008
    Location
    near Rockhampton
    Posts
    5,993

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    Yes it is a 4KW version. I hooked it up to the 10EE and runs the MG fine off a 10amp power point .

    The unit indicates at idle the MG draws 1.8A, which I suspect is per phase on the three phase side. Running the lathe no load at 2500rpm it goes up to 6amps.

    These units if reliable and long lasting are bits of game changers for your older machinery with just a single motor to run everything.
    Gold, the colour of choice for the discerning person.

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