cnc stepper motor driver

Introduction:

The cnc stepper motor driver internally uses a circuit similar to the servo control principle. This circuit keeps the motor running smoothly and it has almost no vibration and noise during operation. When the motor is at high speed, the torque is much higher than other stepper motors. Its positioning accuracy is as high as 60,000 steps/rev. This product is widely used in CNC milling machines.

The operation of the cnc stepper motor driver is controlled by a pulse signal that is rotated by a step angle at the moment when the effective edge of the pulse signal arrives.

The valid edge of the driver refers to the moment when the pulse signal current is "small to large", or the moment when the pulse level is "low to high", or the moment when the internal optocoupler of the driver is "closed to open".

Specification:

Parameters setting : 

The motor driver use eight DIP to microstep subdivision , automatic current and half /full  current , more details are as below :

Working current setting:

• low vibration, low noise, high speed performance;

• Integrated IO control, controlled, continuous self-running mode control signal 4-24V, PLC direct input

• PI control algorithm, low noise, low vibration, low heat;

• Signal input: single pulse, double pulse, IO control optional;

• Built-in micro-segmentation, low-segment mode can also achieve high-level smooth state;

• After the pulse input stops for 1S, the output current is automatically halved to reduce the motor heating;

• It can drive 4,6,8 line two-phase stepping motor, and has automatic parameter setting function for different motors;

• Optically isolated differential signal input, input pulse frequency up to 300KHz;

• With overvoltage, undervoltage alarm, phase current overcurrent protection, motor phase open circuit detection and other functions.

Interface of motor driver :

Note : 1.VCC is 5V, R is short connection .
1.VCC is 12V , R is 1K , over than 1/8W resistance.
2.VCC is 24V , R is 2K , over than 1/8w resistance,  need connect in the end of signal of controller.
Interface  connection and installing size :

The drive has two input modes, which can be selected using the DIP dial switch ISM bit.

(1) CP/DIR mode: The direction of rotation of the motor is controlled by the DIR commutation level, and the step signal depends on the CP. For example, when DIR is high, the motor rotates clockwise, and when DIR is low, the motor rotates counterclockwise in the opposite direction. This type of commutation is called the single pulse mode. The dial switch ISM is set to the "OFF" position.

(2) CW/CCW mode: The driver accepts two pulse signals (generally labeled as CW and CCW). When one of the channels (such as CW) has a pulse signal, the motor runs forward, and when another channel (such as CCW) has a pulse signal. When the motor runs in reverse, we call it the double pulse mode. The dial switch ISM is set to the "ON" position.

2. FREE+ /FREE-: This signal is an enable signal and defaults to the active state when not connected. At this time, the driver works normally. When the signal acts, the driver power circuit stops working. At this time, the motor is in a torque-free state, and this signal is an optional signal.

In order to enable the control system and the driver to communicate normally and avoid mutual interference, we use optocoupler devices inside the driver to isolate the input signal. The internal circuit interface of the three-way signal is the same.