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IndustryArena Forum > CNC Electronics > Spindles / VFD > Spindle Speed Fluctuate
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  1. #1

    Join Date
    Dec 2021
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    27

    Spindle Speed Fluctuate

    Hi.

    I am having problem of spindle speed fluctuation. My rpm goes +-500 to +-800 up and down always amd doesn't remain constant

    My machine have 1.5kw 400hz water cool spindle with ae-200 vfd.

    Need help as this problem effect my aluminum milling jobs.

    One thing more. It doesn't fluctuates when rpm set to 24000

    Also i check. My spindle is ground correctly my machine is ground correctly and my vfd main 220v is ground correctly

  2. #2

    Join Date
    Dec 2021
    Posts
    27

    Re: Spindle Speed Fluctuate

    https://youtu.be/6-l8fr6J8lo

    Here is the link of my problem. I set it 10000rpm but rpm doesn't remain constant it increase and decrease by itself

  3. #3

    Join Date
    Dec 2021
    Posts
    27

    Re: Spindle Speed Fluctuate


  4. #4
    Member
    Join Date
    Jan 2005
    Posts
    14193

    Re: Spindle Speed Fluctuate

    Quote Originally Posted by Chmfhm View Post
    https://youtu.be/6-l8fr6J8lo

    Here is the link of my problem. I set it 10000rpm but rpm doesn't remain constant it increase and decrease by itself
    At 10,000 RPM you don't have much torque

    How many amps is your mains power supply to the machine??

    The VFD Drive you have is not very good as well so you can't expect very much from it, try lighter cuts and see it it does the same thing.
    Mactec54

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