Fault phenomenon (1) - spindle heating

(1) The pretightening force of the spindle bearing is too large, causing excessive friction when the spindle rotates, causing the spindle temperature to rise sharply. This can be eliminated by readjusting the spindle bearing preload.

(2) Grinding or damaging the spindle bearing will also cause excessive friction when the spindle rotates, causing the spindle temperature to rise sharply. This can be eliminated by replacing new bearings.

(3) If the spindle lubricating oil is dirty or contains impurities, it will also cause excessive resistance when the spindle rotates, causing the spindle temperature to rise. It can be eliminated by cleaning the spindle box and changing the oil again.

(4) The main shaft bearing’s lubricating grease is exhausted or there is too much lubricating grease, which will also cause excessive resistance and friction when the main shaft rotates, causing the main shaft temperature to rise. Eliminate it by re-greasing.

Fault phenomenon (2) - the spindle stalls during strong cutting

(1) The transmission belt connecting the spindle motor and the spindle is too loose, causing the spindle transmission torque to be too small. During strong cutting, the spindle torque is insufficient, an alarm is generated, and the CNC machine tool automatically stops. Eliminate it by readjusting the tension of the spindle drive belt.

(2) There is oil on the surface of the transmission belt connecting the spindle motor and the spindle, causing the transmission belt to slip during the spindle transmission. The spindle torque is insufficient during strong cutting, causing an alarm and the CNC machine tool to automatically stop. Eliminate it by cleaning with gasoline or alcohol and then wiping it clean.

(3) The transmission belt connecting the spindle motor and the spindle has failed after being used for a long time, causing the spindle motor torque to be unable to be transmitted. During strong cutting, the spindle torque is insufficient, an alarm is generated, and the CNC machine tool automatically stops. Eliminate it by replacing the new spindle drive belt.

(4) The clutch and coupling in the spindle transmission mechanism are too loose or worn, causing the spindle motor torque transmission error to be too large and the spindle to vibrate strongly during powerful cutting. An alarm is generated and the CNC machine tool automatically stops. Eliminate it by adjusting or replacing the clutch or coupling.

Fault phenomenon (3) - The noise is too loud when the spindle is working

(1) The dynamic balance of the spindle component is poor, causing excessive vibration when the spindle rotates, causing operating noise. Professionals from the machine tool manufacturer are required to re-check and debug the dynamic balance of all spindle components.

(2) The main shaft transmission gear is worn, causing the gear meshing clearance to be too large. The impact vibration is too large when the main shaft rotates, causing operating noise. Professionals from the machine tool manufacturer are required to inspect, repair or replace the spindle transmission gear.

(3) The spindle support bearing is roughened or damaged, causing the spindle rotation clearance to be too large, causing excessive impact and vibration during rotation, causing operating noise. Professionals from the machine tool manufacturer are required to inspect, repair or replace the bearings.

(4) The spindle transmission belt is loose or worn, causing excessive friction when the spindle rotates, causing operating noise. Eliminate it by adjusting or replacing the drive belt.

Fault phenomenon (4) - the tool cannot be clamped

(1) The displacement of the disc spring is too small, so that the spindle tool grabbing and clamping device cannot reach the correct position, and the tool cannot be clamped. Eliminate this by adjusting the disc spring stroke length.

(2) The spring collet is damaged, preventing the spindle clamping device from clamping the tool. Eliminate it by replacing the spring collet with a new one.

(3) The disc spring fails, so that the spindle gripper and clamping device cannot move to the correct position, and the tool cannot be clamped. Eliminate it by replacing it with a new disc spring.

(4) The rivet on the tool handle is too long and hits the spindle gripper and clamping device, making it unable to move to the correct position and the tool cannot be clamped. Eliminate it by adjusting or replacing the rivets and installing them correctly.

Fault phenomenon (5) - the tool cannot be released after being clamped

(1) The pressure and stroke of the tool releasing hydraulic cylinder are insufficient. Eliminate it by adjusting the hydraulic pressure and position of the travel switch.

(2) The disc spring is pressed too tightly, so that the spindle clamping device cannot fully move to the correct position and the tool cannot be released. This can be eliminated by adjusting the nut on the disc spring to reduce the amount of spring compression.