Need Help! 12v --> 10v Nowforever D100S2R2B inverter & MKS-V-V02 CDXHCTECH board


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Thread: 12v --> 10v Nowforever D100S2R2B inverter & MKS-V-V02 CDXHCTECH board

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    Question 12v --> 10v Nowforever D100S2R2B inverter & MKS-V-V02 CDXHCTECH board

    Hello. I bought a cnc 6040, 2.2KW on aliexpress from Chinacnczone.

    The cnc works well enough only that I have a problem.

    The spindle speed is about 20% greater than the one set as shown in the following graph:

    s1000 -> 23.60
    s2000 -> 40
    s4000 -> 74
    s6000 -> 114
    s8000 -> 150.80
    S10000 -> 187.60
    S12000 -> 230.80
    S14000 -> 270
    S15000 -> 290
    S16000 -> 309.6-310
    S18000 -> 356
    S20000 -> 400




    It should go to 400Hz when I set s24000 and not with s20000.

    I opened the controller and found that they connected the output of the inverter (Nowforever D100S2R2B) that is 12v to a board input (MKS-V-V02 ???????????) that instead expects10v, as shown in the following scheme.




    How can I solve the problem? Where to get 10v?


    Thank you.

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    Attached Thumbnails Attached Thumbnails 12v --> 10v  Nowforever D100S2R2B inverter & MKS-V-V02 CDXHCTECH board-graph-speed-jpg   12v --> 10v  Nowforever D100S2R2B inverter & MKS-V-V02 CDXHCTECH board-scheme-jpg  


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    Default Re: 12v --> 10v Nowforever D100S2R2B inverter & MKS-V-V02 CDXHCTECH board

    An LM317 voltage regulator can do the trick if you want to pin it to a 10V output, you just need to calibrate it to output only 10V.




    Attached Thumbnails Attached Thumbnails 12v --> 10v  Nowforever D100S2R2B inverter & MKS-V-V02 CDXHCTECH board-1-jpg  


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    Default Re: 12v --> 10v Nowforever D100S2R2B inverter & MKS-V-V02 CDXHCTECH board

    Hi. Thanks for your reply.

    I need +10v power supply not AVI 0 to 10v...



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    Default Re: 12v --> 10v Nowforever D100S2R2B inverter & MKS-V-V02 CDXHCTECH board

    Well im sure you can step down your existing power supply on your unit, dropping from it 12VDC to 10VDC, it depends on your electronics skills though, (I can ) or you can simply use LM338 high amperage regulator to drop down the main power supply 12V to 10V



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    Default Re: 12v --> 10v Nowforever D100S2R2B inverter & MKS-V-V02 CDXHCTECH board

    Can I put 4 1N4007 diodes in series? I should have 13.1-4 * 0.7 = 10.3 v.
    What do you think about it? Or is it better to use the UA78L10 for example?

    Thanks



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    Default Re: 12v --> 10v Nowforever D100S2R2B inverter & MKS-V-V02 CDXHCTECH board

    Yep you can do that too dropping output voltage through diodes in series



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    Default Re: 12v --> 10v Nowforever D100S2R2B inverter & MKS-V-V02 CDXHCTECH board

    Is it ok to test with 20mA?


    Thanks

    Attached Thumbnails Attached Thumbnails 12v --> 10v  Nowforever D100S2R2B inverter & MKS-V-V02 CDXHCTECH board-2018-01-07-01-35-58-jpg  


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    Default Re: 12v --> 10v Nowforever D100S2R2B inverter & MKS-V-V02 CDXHCTECH board

    Thanks to a suggestion I managed to improve the situation clearly only through the mach3 software.
    I set the spindle speed on mach3 at 28800 so at 24000 the right frequency is 400Hz.


    Is it possible to further improve the inverter's response?


    Thanks so much.



    Attached Thumbnails Attached Thumbnails 12v --> 10v  Nowforever D100S2R2B inverter & MKS-V-V02 CDXHCTECH board-software-jpg  


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12v --> 10v  Nowforever D100S2R2B inverter & MKS-V-V02 CDXHCTECH board

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