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IndustryArena Forum > WoodWorking Machines > DIY CNC Router Table Machines > large heavy gantrys..that need brakes on motors

Thread: large heavy gantrys..that need brakes on motors

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  1. 03-04-2009, 03:28 AM #1
    eloid
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    large heavy gantrys..that need brakes on motors

    I seen servo motors on cnc that have brakes to slow down motors when require for heavy loads ie gantrys and require stops

    anyone using them .. what your set up like?
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  2. 03-04-2009, 04:13 AM #2
    Al_The_Man's Avatar
    Al_The_Man
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    I have never yet seen a brake on a servo motor that was intended to slow it down, the common use is to prevent back feeding when servo is off, as in a heavy vertical axis etc.
    Al.
    CNC, Mechatronics Integration and Custom Machine Design

    “Logic will get you from A to B. Imagination will take you everywhere.”
    Albert E.
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  3. 03-04-2009, 04:27 AM #3
    gt3073b
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    The brake on a servo motor is to support a vertical load when the power is off. The brakes are not proportional like the brakes on a car. They are magnetically released like the emergency brakes on a train. They also are typically rated to survive only a few dozen revolutions before they burn up and fail in the safe (locked rotor) position.

    Bryan.
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