Inventory of nc machine tool spindle common fault and the solution

Spindle is referring to the machine drives the workpiece or tool axis of rotation.Machine tool spindle are usually made of the main shaft, bearing and transmission parts (gear or pulley), etc.There are mainly two kinds of high-speed spindle in the actual application:
& have spentKind of transmission of high speed motorized spindle is zero, this kind of main shaft by using the structure of the motor and spindle integration, and through the accurate dynamic balancing correction, so have good rotation accuracy and stability, but the output torque and power limit.
& have spentAnother kind is variable frequency spindle motor and mechanical transmission mechanism with the combination of the spindle.This type of spindle of the output torque and power far more, but relatively rotation accuracy and stability to almost, so for this type of spindle, how to properly design influence on the machining accuracy of machine tool spindle and its components are critical.
& have spentNc machine tool spindle common fault and the solution
& have spentA, with variable frequency spindle turn
& have spentThe cause of the problem and the processing method:
& have spent(1) caused by the failures of mechanical transmission: look for fracture belt drive whether or machine hung up the gap.
& have spent(2) the supply of the main shaft of the three-phase power supply lacks or reverse phase: check the power supply, switching of the two power cords.
& have spent(3) circuit connection error: refer to the circuit connecting the handbook, to ensure the correct attachment.
& have spent(4) the system has no corresponding spindle control signal output: the multimeter measurement system output signal, without the spindle control signal output, is the need to change IC components or send the relevant plant maintenance.
& have spent(5) system have corresponding spindle control signal output, but the power supply circuit and the control signal output circuit break or damage of components: the multimeter to check system between the spindle motor and power supply circuit, signal control circuit whether there is open circuit;Whether there is open circuit;The connection between the contact is bad contact;There is no damage to ac contactor, dc relay;Check thermal relay over-current;Check whether insurance tube burning, etc.
& have spentSecond, the spindle with frequency converter not turn
& have spentThe cause of the problem and the processing method:
& have spent(1) caused by the failures of mechanical transmission: look for fracture belt drive whether or machine hung up the gap.
& have spent(2) the supply of the main shaft of the three-phase power supply lacks: check the power supply, switching of the two power cords.
& have spent(3) numerical control system of inverter control parameters not open: consult system specification, variable frequency parameters and change.
& have spent(4) system and the inverter circuit connection error: refer to the attachment instruction system and converter, and ensure the correct attachment.
& have spent5 analog voltage output is not normal: use a multimeter to check the system output analog voltage is normal;Check the analog voltage signal wire connection is correct or poor contact, inverter receive analog voltage matches.
& have spent6 high-voltage electrical control part of the circuit or component damage: check the spindle power supply this line contact connection is reliable, line ever open circuit, dc relay is damaged, if insurance tube burn out.
& have spentCruelly inverter parameters set: frequency converter contains control mode selection, divided into the inverter control panel spindle way, way of NC system to control the main shaft, etc., if you don’t choose the NC system control mode, the spindle can’t use the system control, change the parameters;Check the related parameters setting is reasonable.
& have spent
3, without frequency conversion of the spindle (shift the spindle rotation speed is not controlled
& have spentThe cause of the problem processing method:
& have spent(1) the control signal output system without S01 – S04: look for gear shift control signal output system.If no, then the system failure, replace the IC or send for repair.
& have spent(2) the connection line fault: if the system has the shift control signal output, then check the connection line whether there is open circuit or poor contact, check whether dc relay or contactor is damaged.
& have spent(3) the spindle motor damage or short circuit: check the spindle motor.
& have spent(4) not mechanical shift: hang up yourself.
& have spentFour, spindle brake
& have spentThe cause of the problem processing method:
& have spent(1) abnormal braking circuit or high voltage components damage: check the bridge pile, fuse, ac contactor is damaged;Check whether high voltage circuit breakers.
& have spent(2) the braking time is not long enough, or the inverter braking time parameter adjustment system.
& have spentNo braking signal output (3) system: replacement of internal components or sent for repair.
& have spent(4) inverter control parameters set: refer to instruction manual frequency converter, inverter parameter set correctly.
& have spentFive, the spindle start immediately after stop
& have spentThe cause of the problem processing method
& have spentEnough time: (1) the system output pulse adjusting system of M code output time.
& have spent(2) the inverter in the running state: refer to the instruction for use of frequency converter, set up parameters.
& have spent(3) main line of control components damage: check circuit all touch the contacts are in good condition, check whether the dc relay contactor is damaged, contact not self-locking
& have spent(4) the spindle motor short circuit, causing thermal relay protection: investigate the cause of short circuit, to reset the thermal relay.
& have spent(5) the spindle control circuit without self-locking circuit, and the parameter is set to the pulse signal output, make the spindle will not operate properly, the system control spindle to control parameters instead of level control.
& have spentSix, the spindle rotation can’t stop
& have spentThe cause of the problem processing method:
& have spent(1) ac contactor or dc relay is damaged, and off for a long time, can’t control: the change of ac contactor or dc relay.
& have spent(the original title: all kinds of machine tool spindle fault solution! Learn to earn!) (source: to check the net)