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Thread: Questions regarding spindle drive parameters.

  1. #1
    Join Date
    May 2004
    Posts
    198

    Default Questions regarding spindle drive parameters.

    I just put a 3hp colombo spindle on my shopbt. it is driven by a Commander SE VFD.

    I have the VFD parameter List, and i have the info Tag on the spindle.

    One of my questions is about what others have set their parameters to.

    (1) Minimum speed in Hz, mines set a 75 Hz
    (2) Max speed in Hz, mines set at 400 Hz

    (3) What is the power factor? I don't see that on the tag. mines set at .91

    (4)My VFD has a parameter for rated speed(rpm), however the parameter does not hold a big enough value. The manual for the VFD says if this case occurs, use 0 for the parameter.

    How does one dertermine the rpm of the spindle?

    Can the VFD run the spindle to fast and damage it?
    Attached Images Attached Images

  2. #2
    Join Date
    Jan 2004
    Location
    iBILD Solutions - Southern NJ
    Posts
    7,986

    Default

    Don't know about that specific VFD in regards to display options. I believe the lower RPM limit on the newer spindles are programmed with 5000 as the lowest RPM. Your Colombo is a 400Hz spindle and you have a matching 400Hz VFD. This is good. There is no danger of over revving it. An HSD, which is a 300Hz spindle, could over rev if put on a 400Hz VFD without max RPM limit set.

    Each Hz is 60 RPM. 300Hz = 18,000 RPM & 400Hz = 24,000 RPM

    Hope that helps...

    -B
    High Definition 3D Laser Scanning Services - Advanced ShopBot CNC Training and Consultation - Vectric Custom Video Training IBILD.com

  3. #3
    Join Date
    May 2004
    Posts
    198

    Default Thanks Brady!

    Thanks Brady! I'm gonna go shave down my table then!

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