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  1. #21
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    Default Re: Newbi with Chinese 2520t problem

    Here is the diagram i built my machine from, Ploter CNC / Drukarka - gotowy projekt - REPRAPOWO - Forum Techniczne poświęcone budowie drukarek 3D
    google ardunio uno with shield diagram, that will be plenty for your nema 17 motors,

    the part you will need a power supply, arduino uno, shield board, and Pololu A4988 driver module.
    forum.hobbycomponents.com - View topic - CNC V3.0 Arduino Compatible Shield (HCARDU0086)
    that way all you parts will be locally available, you can set it up and run it a bit harder if need.



  2. #22
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    Default Re: Newbi with Chinese 2520t problem

    Hi
    The voltages is 18volt on the yellow and 38volt on the blue. I tested the just to make sure the they are giving out power so that is good. The red wire facing you gives out power to the controller.. i just cant think now how much, i will go have a look after breakfast. Regarding the testing, this is how they asked me to test for them
    I will ask them for a diagram, thank you



  3. #23
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    Default Re: Newbi with Chinese 2520t problem

    Quote Originally Posted by melvinbruce View Post
    Here is the diagram i built my machine from, Ploter CNC / Drukarka - gotowy projekt - REPRAPOWO - Forum Techniczne poświęcone budowie drukarek 3D
    google ardunio uno with shield diagram, that will be plenty for your nema 17 motors,

    the part you will need a power supply, arduino uno, shield board, and Pololu A4988 driver module.
    forum.hobbycomponents.com - View topic - CNC V3.0 Arduino Compatible Shield (HCARDU0086)
    that way all you parts will be locally available, you can set it up and run it a bit harder if need.
    I saw the uno with the shield on Banggood for quite cheep CNC Shield V3 3D Printer Expansion Board+A4988 Driver+ Geekcreit? UNO R3 Sale - Banggood.com
    Thought it will not be enough need something more



  4. #24
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    Default Re: Newbi with Chinese 2520t problem

    Quote Originally Posted by kimb0 View Post
    I saw the uno with the shield on Banggood for quite cheep CNC Shield V3 3D Printer Expansion Board+A4988 Driver+ Geekcreit? UNO R3 Sale - Banggood.com
    Thought it will not be enough need something more
    Yep that is it, those A4988 can put out 2 amps max, you nema motors are 1,5 amps max, just make sure you use the heat sinks on the A4988 and in you configuration h file for the arduino uno board set you limit there.

    Last edited by melvinbruce; 07-23-2016 at 05:46 AM.


  5. #25
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    Default Re: Newbi with Chinese 2520t problem

    Look at this video got some good info.




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    Default Re: Newbi with Chinese 2520t problem

    ok coming from the transformer. blue wire 40volt, yellow wire 20volt. Red wire going down to the control board 43.8volt . I get continues on the stepper looking at the video from the left as pin one on the plug on pin 1 and 2 then 3 and 4 the same if the estop is pressed or not



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    Default Re: Newbi with Chinese 2520t problem

    Quote Originally Posted by kimb0 View Post
    ok coming from the transformer. blue wire 40volt, yellow wire 20volt. Red wire going down to the control board 43.8volt . I get continues on the stepper looking at the video from the left as pin one on the plug on pin 1 and 2 then 3 and 4 the same if the estop is pressed or not
    not quite sure what the question here is, but from what i see there you seem to have all the correct voltages, the purpose of a e stop, is to stop the electrical circuit in an emergency,



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    Default Re: Newbi with Chinese 2520t problem

    Not sure why my last post did not go through. I get the same values no matter if the estop is pressed or not. Like the estop is not working



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    Default Re: Newbi with Chinese 2520t problem

    Quote Originally Posted by kimb0 View Post
    Not sure why my last post did not go through. I get the same values no matter if the estop is pressed or not. Like the estop is not working
    they may have just a signed the estop in there program to pause or stop it should there be a problem during machining.



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    Default Re: Newbi with Chinese 2520t problem

    They send me a new control box, should be here by next week



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    Default Re: Newbi with Chinese 2520t problem

    Quote Originally Posted by kimb0 View Post
    They send me a new control box, should be here by next week
    Did you ask them for the drawing to fault find?



  12. #32
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    Default Re: Newbi with Chinese 2520t problem

    I did ask hey told me they must get at the engineer



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    Default Re: Newbi with Chinese 2520t problem

    Quote Originally Posted by kimb0 View Post
    I did ask hey told me they must get at the engineer
    Lol, they always need an engineer. Remember when I use to deal with Taiwan for the blow moulded I use to repair, same story. Need a engineer.



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    Default Re: Newbi with Chinese 2520t problem

    Yea and the lady hellping me is really not clued up. Seem like she just say what was told to her



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    Default Re: Newbi with Chinese 2520t problem

    got the new control bx and everything works again

    question: i am trying to clamp some small objects down with double sided tape, but it keeps on coming loose, also hot glue. Is the some kind of trick to this?



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    Default Re: Newbi with Chinese 2520t problem

    Quote Originally Posted by kimb0 View Post
    got the new control bx and everything works again

    question: i am trying to clamp some small objects down with double sided tape, but it keeps on coming loose, also hot glue. Is the some kind of trick to this?
    the double sided tape must be good quality 3M, then it should work fine, as for the hot glue gun it must cool down completely.



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    Default Re: Newbi with Chinese 2520t problem

    ok thank you



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Newbi with Chinese 2520t problem

Newbi with Chinese 2520t problem