It is important to be aware of the most common issues that may arise while using a tabletop CNC mill for normal operations. Here, we describe how to handle CNC machine failures.

Fault Diagnosis and Treatment of CNC Equipment Observe all other components and confirm that the electric control cabinet is functioning normally and check a list of the most frequently encountered CNC machine tool problems.
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The first step is to make sure that the CRT's connecting cable is secure and that the adapter connector in the electric control cabinet is working properly. The CRT unit's input voltage should be checked. The power supply used by a CRT unit varies greatly in nature and voltage due to the various manufacturers. Generally speaking, 9in monochrome CRTs use +24V DC power supply, while 14in color CRTs use 200V AC voltage.. To begin, you need to gather the relevant data and determine the specifics of the piece of equipment in question. The device requires a DC 24V supply.

The CRT unit has failed. There are several components in a CRT unit, including the display unit and the regulator unit. Only a simple, intuitive procedure can be used for this type of inspection. While trying to transfer the video signal from the MMC circuit board in the NC system, we discovered that there was no signal on the computer's monitor. Consequently, we can deduce that the issue is with the MMC board, which should be treated with care when dealing with a circuit board problem. Because of the ease with which data can be lost in a numerical control system due to a circuit board issue. An MMC board, in particular, is like a stand-alone computer, complete with its own hard drive and internal memory. [*] After backing up the contents of the device, we ensure that one end is powered off before connecting cables. Because even a small change in voltage can corrupt or destroy data on the VCE series CNC single column vertical turning center of cable connector, it is imperative that the circuit board be disconnected from power before disassembling the entire device. After determining the problem, simply apply the correct medicine to the situation and the issue will be solved.

The most common CNC machine failures are broken down into categories.
a. Feed the drive system b.
DC feed drive and AC feed drive are the two main types of feed drive. There are three general types of failures. One method is to use a diagnostic software program to show alarm information on a CRT; another is to use hardware on the speed control unit (LED indication, fuse fusing, etc.) to show alarm information; and a third is to ensure that no alarm information is defective.

2. An alarm that is generated by software.
The system monitors and alarms the feed drive to display this type of warning on the CRT. The first case is an error alarm of the servo feed system; most of these alarms are caused by faults in speed control, or failures in parts related to position control or servo signal of NC; the second case is the fault caused by the relevant detection elements (speed measuring motor, resolver or pulse encoder); the third case is an alarm about overheating, such as servo unit, transformer and motor.

In addition, there is a hardware alarm.
Fuse-fusing the speed control unit's alarm indicator light and various other switches (for protection) are also included. Depending on the speed control unit, the alarm indicator can mean different things. The following are typical scenarios:
A single high voltage alarm. AC power supply voltage or motor insulation capacity exceeding ten percent of rated value are the two most common causes of this type of alarm to sound. A megger can be used to test the motor's insulation.
An alarm has been raised due to an abnormally high current. The most common cause of this type of alarm is damage to the speed control unit's power driving element thyristor or transistor module. A multimeter can be used to check the module's collector/emitter resistance if power is lost. If it is less than 10, it indicates that the module has been damaged.
Alarm for low voltage.
Alarms went off four times. Due to the long service life of this equipment, there are many mechanical loads that have been severely worn, and the upper limit of the motor current on the speed control unit is set too low. The current setting value can be altered.
Alarm with 5-speed feedback. Weak speed or position feedback lines on servo motors or poor connector contacts are the most common causes of this type of alert. NC's feedback signal processing module may also be at blame.
6 The circuit breaker or the fuse blows. Depending on the situation, there could be a variety of causes for this type of alarm. Identifying the root cause of the fusing problem is necessary if the alarm persists after the fuse has been replaced.
Switching to 7 Protection mode. There is a very simple explanation if this alarm sounds because the protection switch has been tripped. Use a travel switch to avoid repeating an operation. If the transformer overheats and the air switch trips, you'll need to figure out what's going on and fix it. Other issues arise because of overheating in the data-processing process.
⑧ Failure without a visual indication of an error. Such failures include machine tool vibration, machine tool out of control, excessive machine tool noise, and so on. When this occurs, the situation must be taken into account in its entirety, and a decision must be made based on that consideration.