Precision CNC lathe according to the mode of motion can be divided into which?

Precision CNC lathe according to the mode of motion can be divided into which?

There are many kinds of CNC machine tools, can be classified from different angles, different classification standards corresponding to different classification, the introduction of two classification methods

It's classified according to movement and control,

Specific content is as follows: CNC machine tools according to the mode of motion division;

Can be divided into:

Open-loop CNC machine tool refers to the control system without feedback, there is no position feedback element in the system, usually using stepping motor as the actuator.The input data is calculated by the numerical control system, and the instruction pulse is sent out. The step motor is rotated by a step Angle through the circular distributor and the driving circuit, and then moves the working table through the transmission mechanism to move the distance equivalent to a pulse.The moving speed and displacement of the moving parts are determined by the frequency and number of input pulses.

The semi-closed-loop CNC machine tool installs the angular displacement detection device (photoelectric encoder or induction synchronizer) at the end of the motor or the end of the transmission lead.The actual position or displacement of the actuator is measured indirectly by measuring the motor or screw Angle and then fed back to the CNC system.Although taizhou CNC lathe equipment supply obtained a higher accuracy than the open-loop system, but its displacement accuracy is lower than the closed-loop system, compared with the closed-loop system, it is easier to achieve the stability of the system.

At present, most CNC machine tools are widely used this kind of semi-closed loop feeding mechanism, the inertia of the machine tool moving parts are not included in the measurement range of ningbo CNC lathe equipment supply.