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  1. #291
    Quote Originally Posted by Clive S View Post
    The only thing the 72v ps is supplying is the drives so what has the 1mm wiring got to do with it. Also 1mm cable can carry in the region of 10A
    Hi Clive S,

    yes that is exactly the point.
    Normally the current will not go past that, my 1mm2 will only carry power to 1 driver.


    Until something goes wrong that is.

    When a short happens on a transformer it is capable of more current.
    It might smoke my 1mm2 panel wiring i believe.
    But maybe the rectifier will blow out first.

    In my line of work the secundary fuses also match the spec of the panel wiring.

    So i think a secundary fuse might be a good idea.


    While is was looking up data on my particular transformer, the datasheet mentions the precense a TCO in the primary windings... so transformer thermal overload is sorted.



    Can't find any specific data on max fault current though..
    Maybe it can be calculated ... not my field of expertise.

    Grtz Bert.



    Verstuurd vanaf mijn SM-A320FL met Tapatalk

  2. #292
    Quote Originally Posted by Nickhofen View Post
    Hi Bert
    Thanks for the reply.

    The relays that the card has onboard are charachterized as ''signal relays that should never used as power relays, they are intended to convey signals such as fwd and reverse to a VFD ...However please take care , as the contact of these relays can carry a max current of 0.5 amp at 120V AC or 1 amp at 24V dc.The user must use an external relay if the load requirements of the device will exceed the current rating.''

    This is why i mention the external relay connection.
    To answer the other question you put, I want to connect the maximum I can on this card ,water pump , air nozzle etc.






    Verstuurd vanaf mijn SM-A320FL met Tapatalk
    I am going for this configuration because my previus cnc was wired like that, if there is a better way of course I prefer it.

    You are speaking about traveling proximity switches, right?


    Regards.
    Nick.[/QUOTE]Hi Nick,

    Ask/look around for the multi channel relay boards.

    For the proximity switches.

    You have the inputs for it... so why not


    Grtz Bert.

    Verstuurd vanaf mijn SM-A320FL met Tapatalk

  3. #293
    Quote Originally Posted by driftspin View Post
    Hi Clive S,

    yes that is exactly the point.
    Normally the current will not go past that, my 1mm2 will only carry power to 1 driver.


    Until something goes wrong that is.

    When a short happens on a transformer it is capable of more current.
    It might smoke my 1mm2 panel wiring i believe.
    But maybe the rectifier will blow out first.

    In my line of work the secundary fuses also match the spec of the panel wiring.




    Verstuurd vanaf mijn SM-A320FL met Tapatalk
    your panel wiring really must be able to handle the breaking current of whatever the protective device takes to blow, a slow blow fuse is ideal here, but the wire must be rated suitably - if too thin it will just melt.

  4. #294
    One more add on my diagram.Relay and reset switch.
    Click image for larger version. 

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  5. #295
    Finish this today!
    No cnc relevant , but since I am a sissy as a friend from NY says, to start my wiring,(When someone has not pay a euro for components see it different,LOL), I build other things!
    Click image for larger version. 

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  7. #296
    Nice! What wood is used for the handle? :D

    Been watching alot of YouTube vids about knifemaking so maybe I should give it a go aswell ..?

    Skickat från min SM-G955F via Tapatalk

  8. #297
    Hi Robert.
    The handle is made from root of Olive tree,those trees are very common here.
    Do you watch the competition "Forged in Fire" also? ;-)
    Last edited by Nickhofen; 05-09-2018 at 06:28 AM.

  9. #298
    After some reading at old threads I place the last orders at Aliexpress for contactor, relays, slow blow fuses, power supplies etc.
    I want to say a big thanks to routercnc and driftspin for the help they offer at the backstage, and all the other people of course that keep answering my silly questions! :)

  10. The Following 2 Users Say Thank You to Nickhofen For This Useful Post:


  11. #299
    Can’t remember what I did but you are welcome. Just passing it on . . .
    Building a CNC machine to make a better one since 2010 . . .
    MK1 (1st photo), MK2, MK3, MK4

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