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/*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; Home>Bearing knowledge>Spindle drive system fault repair Spindle drive system fault repair
example 1. The problem of fault detection of the flow detection switch: a CNC grinding machine with SIEMENS SINUMERIK 810 system; the fault alarm F31 "SPINDLE COOLANT CIRCUIT"; indicating that the spindle cooling system has a problem. /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
Analyze and dispose of the process: check the cooling system without any problems; consult the PLC ladder diagram; this problem is detected by the flow detection switch B9.6. Check this switch is found to be damaged; because of the switch problem; cause the alarm to be faulty, replace the new switch There is no problem.
Example 2. Hydraulic pressure instability problem of repairing defects: a special CNC milling machine; in the process of batch processing of the parts of the problem; each problem occurs in the end of the part has been processed; Z-axis backward movement is not in place. The machining program is aborted; spindle Stopped; and the F97 alarm "SPINDLES PEED NOT OK STATION 2" appeared; indicating that the spindle has a problem.
Analysis and disposal process: There is no problem in viewing the spindle system. Because other problems can also cause the spindle to stop; so the external programmer is used to supervise the operation of the PLC ladder diagram; the tool hydraulic clamping pressure detection switch F21 is found to be faulty. It is disconnected when it is open; its disconnection indicates that the clamping force of the milling cutter is not good; for safety reasons; the PLC stops the spindle. After checking, the hydraulic pressure is unstable, and the hydraulic system pressure is adjusted to stabilize it; the fault is removed.
Example 3. The fault of the spindle tool alarm is repaired: one supporting OKUMA OSP700 system; the CNC machine of type XHAD765; the "spindle tool detection abnormal" alarm is presented; the system is in an emergency stop condition.
Anatomy and disposal process: This problem is mostly caused by the fact that the system inserts a tool into the spindle when the spindle has no knife, or when the system assumes that the spindle has a knife; the spindle cutter is removed artificially; The spindle sensors SQl0, SQll, and SQl2 are less likely to be faulty. Simply switch the method back to zero; after resetting, remove or insert the tool in the spindle; adhere to the practice and the spindle tool status in the system. .
If it is not because of the above-mentioned human cause of the problem; then open the PLC data or ladder diagram to see whether the above three switch signals ISPTCl, ISPTL, ISPTUl can be accepted normally; then check whether the switch is faulty.
According to the above, it is found that the SQll switch plug has poor oil contact; it is normal after disposal.
Example 4. The problem of fault repair of the spindle stop during processing: a FANUC OMC system; CNC machine tool of type XH754; the spindle machining process; the spindle suddenly stops; the Z-axis feed continues; the machine does not have any alarm; Tool and workpiece are damaged.
Analyze and dispose of the process: this problem is fresh; it is difficult to determine at one time. To admit the problem; to remove the workpiece; let the machine vacate the program; the probability of this problem is different; sometimes there is no problem at any time; sometimes it is continuous. Can it be composed of disturbances; stop other machine tools; dispose of grounding from the head; problems still exist. Then start with the signal associated with spindle control; check the status of the associated registers in the PMC input and ladder diagram. PMC→CNC signal G120.6 (spindle abort) is high when present; the spindle stop command is not announced to the CNC (G120.6 low; spindle stop), then G229 associated with spindle steering is viewed. 4, G229. 5; Normally, G229. 4 is highlighted; the main axis is turning forward; when the problem is present, G229. 4 is calmed down.
When the spindle maintains forward rotation; R728.4 passes X04.5 normally closed R705.1; R728.4 normally open; X016.7 normally open; R728.0 normally closed; R728.5 normally closed; X016.1 normally open; X016. 2 normally closed insists on conduction (highlighted appearance) and then adheres to G229. 4 conduction; only one of these contacts is disconnected; forward rotation will be aborted: found in continuous investigation; is X016. 1 short time Shine incurs R728. 4 disconnected; therefore suspected X016. 1 has a problem. X016. 1 is the spindle tool clamping in-position detection signal; the corresponding travel switch SQl2 is removed and opened for viewing; it is found that its spring piece has been completely cracked. After; turn on the boot; no further problems.
Repair Comprehension: This problem has exposed a small defect in the PMC control depiction of the machine; the author thinks that if the feed is adhered to the G121.5 signal, the X016 is connected in series. 1 as the interlock signal; The situation; avoid damage to the workpiece, tool and even the machine; together, this can add a message to appear as a fault indication; easy to repair and find. About X016. 1 damage; PMC control gives the corresponding alarm, but the alarm is delayed Attack; if it is delayed X016. 1 contact is closed; the alarm will not be presented, in this case; switch X016.1 is because the spring piece is quickly cracked and dropped; under the influence of oscillation, the condition of the on-time break.
For many problems; looking up with PMC ladder diagram and each register can often achieve better results.
Example 5. The faulty problem of the spindle encoder alarm is: a FANUC OMC system; a CNC machine of the type XH754; the spindle encoder presents "1001Spindle Alarm" and "409 Servo Alarm (serialerr)" alarms.
Anatomy and disposal process: The spindle servo digital tube shows “AL-42â€; the repair material indicates that the spindle encoder has not turned on the signal. Check the encoder cable is normal, remove the spindle encoder; remove it and find that there is a glass grating Layer oil mist; use anhydrous alcohol to remove and dry; after the device is turned on; if the problem is not seen, adjust the spindle orientation from the head; put it into normal production.
Example 6. The fault of the spindle servo drive unit is repaired: one FAGOR 8025MG system; the CNC machine of type XK5038-1 is turned on one day; the spindle alarm; the display shows “Saxis not ready†(the spindle is not ready).
Analyze and dispose of the process: Open the servo unit of the spindle servo unit; find that the servo unit has no appearance. Use the multimeter to measure the spindle servo drive BKH power supply line is normal; the servo unit digital tube is not visible; clarify that the unit is damaged. Check the unit power supply Line; found that the power supply line practice wiring does not match the electrical diagram. When the unit is energized and started; KM5 is closed first; after 2~3s; KM6 is closed; the resistance R is shorted. The effect of the resistor and choke L is to avoid waves at the start. The impact of the inrush current on the spindle unit.
In practice wiring, the three resistors are connected to the three-phase parallel method; the protection effect is not achieved; the spindle unit is damaged when the power is supplied; and the three resistors are energized for a long time.
Wiring from the head according to the electrical diagram; after replacing the new spindle unit; the machine tool recovers normally.
Example 7. Faulty repair of the spindle servo drive unit: a FAGOR 8025MG system; CNC machine tool of type XK5038-1; one day in the rainy season; the spindle servo box is fired; the display shows the "Saxis not ready" alarm.
Anatomy and disposal process: open the spindle electric box; smell a burning smell; black debris scattered at the bottom of the electric box; remove the spindle servo unit; find the power transistor module split; damage is severe; the estimation is difficult to correct. The spindle unit has a high damage rate; the same type has no meaning; the replacement price of the new type is too high; é‚ resolution uses the frequency converter to transform the spindle unit.
The modified spindle unit; the wiring is simplified; the function is unchanged; the spindle starts and stops softly; the production demand is satisfied; the other machine tool disturbances are greatly reduced; the work efficiency is greatly improved.
Example 8. The problem that the spindle can not be changed is the FAGOR 8025MG system; the CNC machine tool of the type XK5038-1; the temperature rises; the operator reflects that the spindle shift time becomes longer; the hydraulic pressure of the hydraulic station rises; Can not change to high speed (1000r/min or more). From the operation panel; high speed light does not light; spindle manual button flashes; prompts to move the spindle, press the click button; spindle shift; high speed light is not bright; spindle The manual button continues to prompt the jog.
Analyze and dispose of the process: the high-speed light does not illuminate that the shifting organization can't shift gears; or the PLC can't receive the high-speed gear in-position sensor signal. Considering that the gear shift is not heard, the resolution first looks at the shifting organization. Headstock cover; see shift gear falling in low gear; manual method input 1200r/min speed to hear the shift solenoid valve; and shift gear does not move; pull by hand; pull it; estimate the existence of stuck image. Will change The swinging cylinder is removed; then the shifting gear is shifted; the upper and lower is sensitive; no problem: the screw shaft end gear is twisted again; the screw cannot be turned; the rectangular seal is cracked when it is opened; the leakage is formed; the crack seal is stuck on the blade together with Between the cylinders; it is stuck. This cylinder is imported; one can not find accessories; then contact the rubber factory; a group of seals replaced with silicone rubber;
Example 9. Z-axis overload alarm fault repair problem: a new machine tool in a factory; the system is FANUC-OMC; the 430 alarm is presented in the production; the Z-axis motor is hot, the machine is stopped for half an hour and then turned on; the alarm is not seen; For a while; the problem is as usual.
Analyze and dispose of the process: based on the appearance of the fault; estimate the Z-axis overload; and the servo fault can be smaller. After the CRT investigates the Z-axis load; it is found that the Z-axis is about 40% when it is suspended; when it is moved, it is more than 80%. The difference is electrical The problem is still mechanical problems; the Z-axis motor coupling is removed; the machine is disengaged; the fault is no longer present, and the Z-axis screw is disabled; the force is found; it is determined to be a mechanical problem. The Z-axis guide The strip is slightly adjusted after loosening; the Z-axis load is significantly reduced; about 20% when it is stopped; about 40% when it is moved;
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Spindle drive system fault repair
Source: Bearing network time: 2018-03-03