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CK6150 common CNC lathe spindle servo system and fault diagnosis

by:SNK     2020-08-24
CK6150 common CNC lathe spindle servo system fault and diagnosis of release time: 2015 - 09 - 30 clicks: 2826 times a servo out-of-tolerance CK6150, CK6150 CNC lathe CNC lathe of the difference between the actual feed value and directive exceed the limited value. (1) check the CNC control system and drive amplifier module, CNC control system and position. (2) detector, between between the driving amplifier and servo motor line is correct and reliable. (3) check the position of detector signal and related D/A conversion circuit if there's any problem. If there is a problem (4) check the drive voltage amplifier. 5. Check the motor shaft with mechanical drive whether cooperate well, loose or clearance does exist. 6. Check the position loop gain is in line with the requirements, if do not conform to the requirements of the potentiometer should be adjusted. Second, the numerical control lathe stops, the feed shaft vibration (1) check and observe the waveform and amplitude, high frequency pulse signal if not comply with the relevant should adjust potentiometer. (2) check the servo amplifier compensation function of the speed loop, if does not conform to the compensation should be adjusted with the potentiometer. 3. Check the position detection with code wheel shaft, coupling, gear mesh is good. Three, CK6150 CNC lathe runtime voice is bad, have oscillation phenomenon (1) check whether the tachogenerator commutator surface is smooth, clean, whether good contact between brush and commutator. (2) check the servo amplifier compensation function of the speed loop, if does not conform to the compensation should be adjusted with the potentiometer. (3) check the servo amplifier the position loop gain is in line with the requirements, if do not conform to the requirements of the potentiometer should be adjusted. (4) check whether there is position between the detector and coupling assembly is loose. 5. Check the position of the detector to feedback signal waveform and the waveform amplitude after D/A conversion. Four, CK6150 CNC lathe appear coasters phenomenon (1) position sensor and speed sensor signal reversed phase, or meet the armature line, namely the system as a whole is not negative feedback into positive feedback. (2) the speed instruction to is not correct. (3) the position sensor and speed sensor feedback signal connected or disconnected wiring. (4) CNC control system or servo control board defective power board has fault caused by the logical confusion. All five, CK6150 CNC lathe axis are not movement (1) the user lock as protective stop, brake, or the movement of the corresponding switch position is not correct. (2) the main fuse power cut. (3) due to overload protection circuit breaker action or monitor with relay contact not good. Six, motor overheating (1) the skateboard runtime friction or resistance is too big. (2) thermal protection relay tripping, the current setting error. (3) excitation current is too low, or permanent magnet motor magnetic loss, in order to obtain the required torque can also cause the motor armature current increases in fever. (4) cutting conditions. (5) motion clamping/brake not released in full. 6 gear transmission is damaged or there is something wrong with the sensor. All landowners motor itself internal turn-to-turn short circuit caused by overheating. End up with a fan cooled motor, fan is bad. Eight, CK6150 position precision CNC lathe is allowed to (1) the skateboard runtime resistance is too big. (2) the position loop gain or the low-frequency gain of the speed loop is too low. (3) mechanical transmission parts have a backlash. (4) of the position loop and speed loop zero balance adjustment is not reasonable. (5) bad grounding shielding or cable wiring is not reasonable. Nine, CK6150 CNC lathe parts processing surface roughness (1) check tachogenerator commutator surface is smooth and the adaptation of the brush conditions. (2) check the high-frequency pulse waveform of the amplitude, frequency, and shape of the filter. (3) check whether the cutting condition is reasonable, the tip is damaged. (4) check the mechanical drive reverse clearance. 5. Check the position detection signal amplitude. 6. Check the vibration of the machine tool condition such as horizontal machine, foundation, the area of vibration on the spindle rotation, etc.
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