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  1. #31
    Hi everyone,

    The build is progressing slowly, mainly just waiting for parcels to arrive, i now have the extrusion and all of the bolts / fixings. I am struggling to figure out what my PSU requirements are, i was wondering if someone might be able to offer some advice?

    I am using 4nm Nema 23's, and using Leadshine AM882 drivers from China.

    This is the datasheet for the Motors i have:

    PDF

    Link for the stepper drivers:

    AM882

    Am i right in thinking that to get the most from the motors and drivers that i am going to need a 68 - 80v PSU? What amperage rating will it need to be? 20A+?


    Again any help would be greatly appreciated, thanks.

    Alex

  2. #32
    Am i right in thinking that to get the most from the motors and drivers that i am going to need a 68 - 80v PSU? What amperage rating will it need to be? 20A+?
    68V with a 650 Va transformer. See Joe's excellent vid.

    https://www.youtube.com/watch?v=4OoQ...zD30sZjtp_VyqY
    ..Clive
    The more you know, The better you know, How little you know

  3. The Following User Says Thank You to Clive S For This Useful Post:


  4. #33
    Hi Clive,

    Many Thanks, just to clarify - that would be 68v & 650Watts? I am really not comfortable building my own PSU, and i cannot seem to find that spec one, so probably i will get two 500Watt PSU's at least then i know neither one will be high loaded, and the ones i am looking at nearly half in price if you buy more than one:


    Power Supply


    What do you think?

    Thanks

    Alex

  5. #34
    Quote Originally Posted by AlexDoran View Post
    Hi Clive,

    Many Thanks, just to clarify - that would be 68v & 650Watts? I am really not comfortable building my own PSU, and i cannot seem to find that spec one, so probably i will get two 500Watt PSU's at least then i know neither one will be high loaded, and the ones i am looking at nearly half in price if you buy more than one:


    Power Supply


    What do you think?

    Thanks

    Alex
    Have a look at the vid. They are easy to build and only require a transformer, rectifier, and 3 Caps. If you are going with a switch mode power supply you will need one a lot bigger to handle the back EMF.
    ..Clive
    The more you know, The better you know, How little you know

  6. The Following User Says Thank You to Clive S For This Useful Post:


  7. Quote Originally Posted by AlexDoran View Post
    Hi Clive,

    Many Thanks, just to clarify - that would be 68v & 650Watts? I am really not comfortable building my own PSU, and i cannot seem to find that spec one, so probably i will get two 500Watt PSU's at least then i know neither one will be high loaded, and the ones i am looking at nearly half in price if you buy more than one:


    Power Supply


    What do you think?

    Thanks

    Alex
    I'm going to build one on advice of Clive S (Also Chaz pointed out do it right!) but if I was to buy one I'd buy these

    https://www.omc-stepperonline.com/po...-s-350-60.html

    UK shipping as well get one per motor.
    http://www.mycncuk.com/threads/10880...60cm-work-area My first CNC build WIP 120cm*80cm

    If you didn't buy it from China the company you bought it from did ;)

  8. #36
    I'm going to build one on advice of Clive S (Also Chaz pointed out do it right!) but if I was to buy one I'd buy these

    https://www.omc-stepperonline.com/po...-s-350-60.html

    UK shipping as well get one per motor.
    And I think you would be disappointed in the result and it will cost you double by the time you add duty etc.
    ..Clive
    The more you know, The better you know, How little you know

  9. The Following User Says Thank You to Clive S For This Useful Post:


  10. Quote Originally Posted by Clive S View Post
    And I think you would be disappointed in the result and it will cost you double by the time you add duty etc.
    No duty on that one Clive as long as you select UK shipping ($3 more) but you're probably right about the disappointed lol.

    I found most the stepperonline stuff is available for either Germany or UK shipping so no import tax and quick shipping but unfortunately not the AM882's :(

    I found them through CNCzone where they've been getting rave reviews from some of the purchasers.
    Last edited by Desertboy; 01-09-2017 at 05:01 PM.
    http://www.mycncuk.com/threads/10880...60cm-work-area My first CNC build WIP 120cm*80cm

    If you didn't buy it from China the company you bought it from did ;)

  11. #38
    In what way does the performance differ?? I was planning to use one 500Watt PSU per 2 Stepper Drivers?

    If not could anyone link me to where I could get the parts to build one??

    Cheers

    Alex

  12. #39
    Quote Originally Posted by AlexDoran View Post
    In what way does the performance differ?? I was planning to use one 500Watt PSU per 2 Stepper Drivers?

    If not could anyone link me to where I could get the parts to build one??

    Cheers

    Alex


    https://www.rapidonline.com/50a-brid...al-case-519318 1 of

    https://www.rapidonline.com/samwha-h...acitor-11-3121 3 of

    https://www.rapidonline.com/lcr-ep08...-clamp-11-3004 3 of

    https://www.rapidonline.com/vigortro...-x-25v-88-0034

    Some people like 24-0-24v I generally use the above
    Last edited by Clive S; 01-09-2017 at 06:09 PM.
    ..Clive
    The more you know, The better you know, How little you know

  13. The Following User Says Thank You to Clive S For This Useful Post:


  14. Thanks for the shopping list ;) Was looking for the previous post were you posted this for me but couldn't find it, this time going to order it tonight.
    Last edited by Desertboy; 01-09-2017 at 06:22 PM.
    http://www.mycncuk.com/threads/10880...60cm-work-area My first CNC build WIP 120cm*80cm

    If you didn't buy it from China the company you bought it from did ;)

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