Results 1 to 11 of 11
  1. #1
    Join Date
    Mar 2017
    Location
    Brisbane
    Posts
    245

    Default 240v to 220v cheap solution? For china stuff

    The servos and China gear I'm looking at online looks like it's not rated to 240v AC Aus mains. Is there a cheap 240v to 220v transformer or electrical solution I can use?

    Looking at some of these servos, I would be a bit worried about powering them straight off my powerpoint:
    https://www.aliexpress.com/item/AC-S...999.273.bNJKSF

  2. #2
    Join Date
    Oct 2012
    Location
    Wallerawang NSW
    Posts
    28

    Default

    I have 5 of these or similar to these servo motors - 3 in my mill and 2 in my lathe and they run fine on 240V. I don't think you will need a transformer. I use my machines most weekends sometimes for 8 hours with no issues. Our supply transformer is just outside my shed and it gives me 253 volts at my machine and they still run cool with no issues for over 3 years now.
    Steve

  3. #3
    BobL is online now Member: Blue and white apron brigade
    Join Date
    Feb 2006
    Location
    Perth
    Posts
    7,182

    Default

    Interestingly the specs on one part of that page do say
    • AC Voltage:208-230 / 240 V !


    I wouldn't worry about it.

  4. #4
    Join Date
    Mar 2017
    Location
    Brisbane
    Posts
    245

    Default

    Quote Originally Posted by Wallerawang View Post
    I have 5 of these or similar to these servo motors - 3 in my mill and 2 in my lathe and they run fine on 240V. I don't think you will need a transformer. I use my machines most weekends sometimes for 8 hours with no issues. Our supply transformer is just outside my shed and it gives me 253 volts at my machine and they still run cool with no issues for over 3 years now.
    Steve
    These chinese ones from aliexpress? A lot do look the same

    And yep thanks BobL, I was just a little paranoid cause I read some posts before about suppliers who put on 240v with VFDs but they won't guarantee them with Australian conditions. My electrical knowledge esp. AC is limited.

  5. #5
    Join Date
    May 2011
    Location
    Murray Bridge S Aust.
    Age
    71
    Posts
    5,942

    Default

    If you're really concerned I have a 240 -220 volt transformer, you can have for the cost of postage, you'd be doing me a favor taking it.
    Kryn
    To grow old is mandatory, growing up is optional.

  6. #6
    Join Date
    Sep 2012
    Location
    York, North Yorkshire UK
    Posts
    6,436

    Default

    Quote Originally Posted by KBs PensNmore View Post
    If you're really concerned I have a 240 -220 volt transformer, you can have for the cost of postage, you'd be doing me a favor taking it.
    Kryn

    Hi Kryn,

    I have an isolation transformer like that, 50 - 60 Hz, 220, 230, 240, 250, in and out ! 5Kw though, needs a sack barrow to shift it !!!
    Best Regards:
    Baron J.

  7. #7
    Join Date
    May 2011
    Location
    Murray Bridge S Aust.
    Age
    71
    Posts
    5,942

    Default

    Hi Baron, the one I have is about 2 kg, came out of some apparatus that I pulled apart from the local vet. Might have been an Xray machine, rings a couple of bells in the brain box. No variables switches or anything, 240 in 220 outlet plug.
    It's FREE, plus Postage if anyone wants/needs it.
    Will do a pic of it when I go out to the shed shortly.
    Kryn
    To grow old is mandatory, growing up is optional.

  8. #8
    Join Date
    Jan 2016
    Location
    Wodonga Vic
    Age
    38
    Posts
    633

    Default

    If you really do need 220v maybe a variac is another option

  9. #9
    Join Date
    Mar 2017
    Location
    Brisbane
    Posts
    245

    Default

    Quote Originally Posted by KBs PensNmore View Post
    If you're really concerned I have a 240 -220 volt transformer, you can have for the cost of postage, you'd be doing me a favor taking it.
    Kryn
    Thank you Kryn, I'd really appreciate that. I'm about to pull the trigger on buying the servos.

    Servos are roughly 1200
    Steppers with feedback are 1000 (but Leadshine, a bit less random of a brand).
    Umming and ahhhrrring a little still.

  10. #10
    Join Date
    Sep 2012
    Location
    York, North Yorkshire UK
    Posts
    6,436

    Default

    Hi Guys,

    Kryn, the transformer I have has removable end plates and you have to move the input and / or output cable ends to a marked tapping. It could also be used at 110/110 V as well. These transformers used to cost a lot of money, its probably worth more in scrap copper today.

    Re: Variac, I have one of those as well ! Another monster, 20 amp if I remember correctly, that weighs around 50 or 60 kilo. It used to have a motor attached to the shaft, but I re-purposed that years ago.
    Best Regards:
    Baron J.

  11. #11
    Join Date
    Jan 2016
    Location
    Wodonga Vic
    Age
    38
    Posts
    633

    Default

    My Variac is only a baby (10amp) and about 20 kilo, it occupies a milk crate on a low shelf in the garage.

    It has a Bakelite wheel on top to adjust the voltage, I feel like Dr Frankenstein every time I use the thing!

Similar Threads

  1. My Tool Storage Solution
    By Keith_W in forum METALWORK GENERAL
    Replies: 13
    Last Post: 5th Mar 2016, 01:21 PM
  2. Is there a solution for joints pulling in
    By Michael G in forum WELDING
    Replies: 6
    Last Post: 9th Feb 2014, 01:47 PM
  3. best way to run 3 phase stuff on 240v ?
    By thorens in forum METALWORK GENERAL
    Replies: 20
    Last Post: 14th Sep 2011, 07:20 PM
  4. Metal bluing solution
    By ohno in forum METALWORK GENERAL
    Replies: 28
    Last Post: 16th Dec 2006, 08:00 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •