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IndustryArena Forum > MetalWorking Machines > Bridgeport Machines > Bridgeport / Hardinge Mills > Advice Needed Regarding Bridgeport Interact Axis Motors
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  1. #1
    Join Date
    Dec 2003
    Posts
    218

    Advice Needed Regarding Bridgeport Interact Axis Motors

    It says on the spec plate on the motor, amongst other things ... Perm Magnet DC Servomotor - Volts 140, Pulse Amps, 50.

    Could somone explain to me what pulse amps are ? If they are the same as normal amps that would meen that this single axis motor is consuming about 6kw of power. I'm sure that cant be right!
    Dom
    http://www.ukrobotics.com/projects

  2. #2
    Join Date
    Dec 2005
    Posts
    3319
    I suspect that "pulse amps" means momentary surge current. In the motor you're talking about, this condition occurs at locked rotor stall. This is also why locked rotor is limited to a 1% or so duty cycle.

    And, yes, you do consume LOTS of power when you stall PMDC motors - and you can also create LOTS of SMOKE. This is why a servo amp with a properly working and configured protection circuit are critical to their operation.

  3. #3
    Join Date
    Dec 2003
    Posts
    218
    Made some phone calls today, found out that 50amps is the peak rating, 8.6 amps continious.
    Dom
    http://www.ukrobotics.com/projects

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