As a CNC milling machine with inclined layout, the special type milling machine has high bending and torsional rigidity and other stability. The high rigidity and high stability of the machine can guarantee the accuracy of the machine processing.

The spindle of the machine tool refers to the axis on the machine tool that drives the workpiece or the tool to rotate. The machine tool spindle is usually composed of a spindle, bearings and transmission parts (gears or pulley). There are two main types of high-speed spindles in practical applications:

One is the high-speed motorized spindle with zero transmission. This kind of spindle because of the integration of motor and machine tool spindle structure, and after accurate dynamic balance correction, so it has good rotation accuracy and stability, but the output torque and power are limited.

The other type of spindle is a combination of variable frequency spindle motor and mechanical variable speed mechanism. The output torque and power of this type of spindle are much greater, but the rotation accuracy and smoothness are relatively poor.

As an important part of the special type milling machine, the main motion of the machine tool spindle generated by rotation is an important condition for forming cutting. If the spindle does not rotate, then the CNC machine will not be able to operate. Spindle non-rotating fault is one of the common fault types of spindle drive system, which can be divided into two categories: the fault with alarm and the fault without alarm. You can take the following steps to find out why:

1, first check whether the motor turns. If the motor does not rotate, then there is a problem with the motor or motor control circuit. Then call an electrician and don't do anything about it.

2, if the motor is rotating, the spindle does not turn, then there is generally a problem with the synchronous belt and synchronous belt wheel. For example, the link between the synchronous pulley and the spindle or the synchronous pulley and the motor is connected with a flat key, if the flat key slips out for some reason, causing idling. There are synchronous belt aging belt teeth spalling and other reasons will cause the motor to turn the main shaft does not turn.

3, there is also a situation that the main shaft is stuck, this situation is rare, but there may be such a situation in the general accident. The identification method is very simple, as long as the hand moves, can be very flexible rotation is normal, otherwise there is a problem.

The above is the reason why the main shaft of the special type milling machine does not turn. In reality, it is necessary to ask the maintenance personnel to carry out professional maintenance immediately when the main shaft does not turn.

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