National Instruments nuDrive 4SX-411 User Manual

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National Instruments nuDrive 4SX-411 User Manual Manual pdf 22 page image

nuDrive Accessory User Guide 22 www.ni.comFigure 20. Servo Amplifier Parts Locator DiagramWarning You can only adjust the balance while the nuDrive is powered and the amplifieris enabled. Use extreme caution and adjust the trimpot with a plastic trimpot screwdriverdesigned for the task. High voltages and currents exist within a powered nuDrive. Do notattempt to make this adjustment unless you are qualified to do so.Carefully adjust trimpot T2 on the servo amplifier until the motor ceases torotate.Status LEDsThe amplifiers in the servo nuDrive also have three status LEDs that areuseful for troubleshooting potential amplifier faults. The amber LED(labeled VS) indicates the presence of DC bus power and should beilluminated whenever the nuDrive is powered on. The center red LED is theovercurrent indicator (labeled IC) which should never be illuminated. If itis, check the motor cabling for short circuits between the motor leadsand/or short circuits to ground at or around the motor. The third red LED is1 Resistors 2 TrimpotsU10U7U8J11U1U6C3C11C12C41R40R12R1R42R7R6R11U11J3 1Q1R20R61U2 U9 U4U3T2 T1ICVSU5INH.J221