1, the stepper motor can not be directly driven by the single-chip microcomputer, the reason is that the single-chip microcomputer port drive ability is not enough. It is not necessary to use a dedicated driver to do current and/or voltage expansion according to the specific parameters of the stepper motor used.
2, the stepper motor drive has a special chip, do not need a single chip microcomputer. How many steps to take, the MCU only needs to send pulses to the driver chip. Stepper motor driver chip, input a pulse to take a step, use a pulse generator circuit to generate stepping pulse, adjust the pulse frequency can make the stepper motorThe adjustment of the speed of walking. Many circuits can generate pulse oscillating circuits with adjustable frequencies.
3, the stepper motor is bound to use the driver, but the so-called driver is not necessarily bought "driver" driver is according to the order of need, in turn to the motor powered ring distributor, for small power motor has a dedicated integrated circuit, can also be composed of discrete components. For high-power motors, the output components can be increased.
2, the difference between l293d motor drive module and l298n is: the chip is different, the output current is different, and the optocoupler is different. Different chips l293d motor drive module: The chip of the l293d motor drive module is a stepper motor drive chip. l298n motor drive module: The chip of the l298n motor drive module is the H-bridge drive integrated circuit chip.
3, L293D each channel peak output current up to 2A L298N operating voltage 8-46 V output current 2A Don't know what you want to drive? If two 130 motors, with the L293D can stepper motor drive chip .
1, of course, the stepper motor driver is used to drive the stepper motor, there are several ports on the driver board, as long as you are connected according to the instructions, you only need to input a certain frequency PWM wave to the driver board through the DSP PWM module, and then the drive is completed by the driver board itself, and there are subdivisions on the driver board for you to choose. Just read the instructions.
2, DQ378M is a three-phase stepper motor using DSP (digital signal processor) control technologyDrive. This innovative product combines advanced control chips with unique control circuits to create a new era of all-digital stepper motor drivers. Its operating voltage range is DC24-80V, which is suitable for a variety of three-phase hybrid stepper motor models with current below 0A and external diameter between 57-86mm.
3. The SANYO DENKI is an innovative closed-loop stepper motor controller with a high-resolution encoder that constantly monitors the position of the current motor shaft. With the encoder feedback function, the current position information is constantly updated every 25 microseconds. If necessary, SANYO DENKI Servo immediately took corrective action to make up for the lost steps. For example, due to a sudden change in load, it is in a out-of-step state, which is a typical shortcoming of a stepper motor.
4, DM542 digital low-voltage stepper motor driver, using the latest 32-bit DSP technology, suitable for driving 586 series motor, with excellent low-speed performance, can meet the application needs of most small and medium-sized equipment. The use of built-in microdivision technology, even under low subdivision conditions, can also achieve high subdivision effect, medium and low speed operation is very smooth, minimal noise.
1, the main difference is that L298 can provide two-way current for the load. Suitable for driving 2 phase or 4 phase stepper motors, can also drive 2 ordinary brush DC motors. The drive current is 2A 2003 can only drive a 4-phase stepper motor. If it is used to drive a DC motor, it can only be rotated in one direction. Reversing changes the connection of the motor.
2, the difference in current, one is a double H bridge, one is a 7-way single-ended Darlington open circuit output.
3, as far as the stepper motor is concerned, ULN2003 only 500 MA current, you divide the voltage by the resistance of the stepper motor, roughly the required current, now it is best to use the chip drive, because there are a lot of protection measures in the chip, component consistency is good, L298N is 2A driver chip, It can drive ordinary motors and servo motors, and the current is larger, and it seems that those who make their own engraving machines or even CNC machine tools use this drive.
Speed error Stepper motor driver chip : The setting of the subdivision will affect the rotation speed of the motor. If the Settings are inconsistent stepper motor driver chip , the motor may run at a different speed stepper motor driver chip , resulting in motion errors. Position error: The setting of subdivision will also affect the positioning accuracy of the motor. If Settings are inconsistent Stepper motor driver chip , the motor may not accurately reach the target position Stepper motor driver chip , resulting in position error. Dynamic performance: The subdivided Settings also affect the dynamic performance of the motor, such as torque and acceleration.
It is correct that the stepper motor needs to use the corresponding driver chip to achieve control. The stepper motor needs to be controlled by the corresponding driver chip. Because the stepper motor needs to pass the current in sequence, the conventional drive mode cannot be achieved, and the corresponding control technology and circuit are needed to achieve the operation of the stepper motor. theIt is correct to use the corresponding driver chip to realize the control of the stepper motor.
Main body different l293d: support Vcc 5~36V micro motor drive integrated circuit chip. l298n: is a double H-bridge motor driver chip. Supports different current l293d: supports Vcc 5~36V, the maximum output current is 1A. l298n: Each H bridge can provide 2A current, the power part of the supply voltage range is 5-48v, the logic part of the 5v supply, accept 5vTTL level.
Precision current technology control technology to make electricityThe machine temperature rise is greatly reduced, the dynamic current is automatically halved at rest, and the performance of the stepper motor is maximized.