What standard stepper motor or servo motor should I choose for the load of about 30KG? 10

Advantages of servo motor: 1. Accuracy: Closed-loop control of position, speed and torque is realized; Overcome the problem of stepper motor out-of-step; 2. Speed:

Good high-speed performance, the general rated speed can reach 2 3 rpm; 3. Adaptability: strong anti-overload ability, can withstand three times the load of rated torque, and is especially suitable for occasions with instantaneous load fluctuations and requirements for fast starting; 4. Stable: Stable operation at low speed, and no stepping operation phenomenon similar to that of stepper motor will occur during low speed operation.

It is suitable for occasions with high-speed response requirements; 5. Timeliness: The dynamic response time of motor acceleration and deceleration is short, generally within tens of milliseconds; 6. Comfort: Heat and noise are significantly reduced.

Disadvantages of servo motors: Servo motors can be used in places where they can be attacked by water or oil droplets, but they are not completely waterproof or oil-proof. Hence ,...

If there is no gear set, calculate the force f on the gear, use the radius of the f gear to get the torque of the motor, and compare the torque-speed chart of the motor to see whether the motor is suitable or not.

Now I don't know the approximate speed of your motor, the servo motor is definitely not needed, the cost of this thing is too much, the stepper motor of 57 should be usable, if you do not consider the size of the motor, you can directly choose the stepper motor of 86, if your motor of 86 is large, you can use the motor of 57 and the gear set to solve it.

The general load unit is: n m (i.e., Nm) as long as the load is determined, then no matter the stepper motor or servo motor nameplate has a rated torque:

n/m。Note: 1 n m is the force of 1 Newton added at a distance of 1 meter from the stress point.

If it's a belt, you can't just deliver the load.

The common one is a 57 stepper motor driven screw workbench, which can move about 50kg of horizontal objects, I think if you are not so heavy, you can choose a smaller one, such as the 42 type, which can completely drive about 40kg of objects.

Hello, the parameters you give are not very complete, so I want to help you calculate it, in fact, the motor selection is mainly to calculate the torque and inertia, I will give you the formula, you set the formula yourself.

J (wire cylinder) = Pi* (D1 1000)) 4th power J (load) = W * (1 2 Pi * BP 1000) square J = J (wire cylinder) + J (load).

pi=, l is the length of the screw cylinder (mm) d is the diameter of the screw cylinder w is the load weight, and the premise of this formula is that the load moves in parallel, not vertically or incliningly. After finding J, look at your actual requirements to determine the load inertia ratio, if you require rapid acceleration and deceleration, the inertia ratio can not exceed 5

You need to know the acceleration time of your system in terms of load torque, and if the acceleration time is not required, it can not be counted.

I don't understand that they're coming to me.

Difference 1: Different ways of control.

Stepper motor: The rotation angle is controlled by controlling the number of pulses, and one pulse corresponds to a step angle.

Servo motor: The angle of rotation is controlled by controlling the length of the pulse time.

2. The workflow is different.

Stepper Motors: The workflow generally requires two pulses for stepper motors to work: signal pulses and direction pulses.

Servo motor: The workflow is a power connection switch, and then a servo motor.

3. The low-frequency characteristics are different.

Stepper motor: It is easy to have low-frequency vibration at low speed.

Servo motor: It runs very smoothly and does not vibrate even at low speeds.

4. The characteristics of moment frequency are different.

Stepper motor: The output torque decreases with the increase of speed, and will drop sharply at higher speed, so its maximum working speed is generally 300 600r min.

Servo motor: It is a constant torque output, that is, within its rated speed (generally 2000 or 3000 r min), the output of rated torque, above the rated speed is a constant power output.

5. The overload capacity is different.

Stepper motor: generally does not have overload capacity.

Servo motor: with strong overload capacity.

Stepper motors.

It is an open-loop control element stepper motor device that transforms the electrical pulse signal into angular displacement or linear displacement, in the case of non-overload, the speed of the motor, the position of stopping only depends on the frequency of the pulse signal and the number of pulses, and is not affected by the change of load, when the stepper driver receives a pulse signal, it will rotate a fixed angle in the direction set by the stepper motor, called "step angle", and its rotation is to run step by step at a fixed angle. The angular displacement can be controlled by controlling the number of pulses, so as to achieve the purpose of accurate positioning, and the speed and acceleration of the motor rotation can be controlled by controlling the pulse frequency, so as to achieve the purpose of high speed.

Servo motorAlso known as actuator motor, in the automatic control system, it is used as an actuator to convert the received electrical signal into angular displacement or angular velocity output on the motor shaft. The rotor inside the servo motor is a permanent magnet, and the U V W three-phase electricity controlled by the driver forms an electromagnetic field, and the rotor rotates under the action of this magnetic field, and at the same time, the encoder of the motor feeds back the signal to the driver, and the driver compares the feedback value with the target value to adjust the angle of rotation of the rotor. The accuracy of the servo motor is determined by the accuracy of the encoder (the number of lines), that is to say, the servo motor itself has the function of sending out pulses, and every time it rotates an angle, it will send out a corresponding number of pulses, so that the pulses of the servo driver and the servo motor encoder form an echo, so it is closed-loop control, and the stepper motor is open-loop control.

First, the control mode of stepper motor and servo motor is different, the stepper motor controls the rotation angle by controlling the number of pulses, and a pulse corresponds to a step angle, but there is no feedback signal, and the motor does not know what position it has gone to, and the position accuracy is not high enough. Servo motor is also by controlling the number of pulses, servo motor every rotation of an angle, will send out the corresponding number of pulses, at the same time the driver will also receive the signal of feedback, and the pulse received by the servo motor form comparison, so that the system will know how many pulses are sent to the servo motor, and how many pulses are received back at the same time, the rotation of the motor can be controlled very accurately, so as to achieve accurate positioning, can be achieved. Second, the overload capacity is not synchronized, and the motor generally does not have the overload capacity.

The AC servo motor has a strong overload capacity. Take the Pilz AC servo system, for example, which has speed overload and torque overload capabilities. Its maximum torque is 3 times the frontal torque, which can be used to overcome the moment of inertia of the inertial load at the moment of start-up.

Because the stepper motor does not have this overload capacity, it cannot work with the stepper motor in some working occasions. Third, the speed response performance of the non-synchronous feed motor from a standstill to the working speed (generally a few hundred revolutions per minute) takes 200 400ms. The acceleration performance of the AC servo system is good, taking the Pilz AC servo motor as an example, from stationary acceleration to its rated speed of 3000 r min.

It only takes a few ms and can be used for control stations that require fast start and stop and high position accuracy.

Personally, I think there are 3 key differences:

1. The first difference: the servo is closed-loop control, with feedback, and knows where to go. Whereas the step is only executed without feedback, it is not known where it goes, unless the target trigger condition is reached.

2. The accuracy is not the same, the servo is stored with high digital accuracy, and the stepping is a one-degree feed, and the accuracy is not as good as the servo.

3. The torque is not the same, the servo is basically a constant moment, and the step speed is inversely proportional to the moment.

First of all, the two motors cannot be compared on one level. The stepper motor (which requires a pulse signal to rotate) should be compared with an ordinary motor (which can be rotated when connected to the power supply), and is compared at the level of power source.

If we examine the position of the output shaft, it can be vividly understood that the stepper motor is a "digital type", and the ordinary motor is an "analog type", both of which are open-loop control. However, with feedback ,—— such as output shaft encoder and control circuit, it constitutes closed-loop control, also called servo control. At this point, the motor is transformed into a servo motor.

However, people usually call the ordinary motor and the servo control circuit integrated together as a servo motor, such as the servo commonly used on the model airplane. The system of stepper motor and servo circuit does not seem to be integrated at present. If so, let's call it a "servo stepper motor".

In terms of use, if the position accuracy is very high, then the servo stepper motor seems to be the only choice.

The 6 points of the difference is very specific, in layman's terms, low-speed occasions with stepping, that is, no more than 1000r min, below 100r min is generally equipped with a reducer, high-speed occasions with servo, 1000-4000r min, and then high-speed with custom servo. There is a misunderstanding that servo must be better than stepping, in fact, at low speed, with the same size, under the same condition, the stepper motor is larger than the servo torque, good rigidity, due to the process and manufacturing costs, stepping ** is cheaper. At present, there is an intermediate product of stepper and servo on the market, called stepper servo, which is essentially stepper and adopts servo algorithm.

The stepper drive system can realize the precise position control of the stepper motor under the condition of open-loop control, which is generally used in the field of medium and low speed, and has a higher cost performance. The stepper driver is a driver that specializes in driving the stepper motor, which is divided into two-phase, three-phase and five-phase according to the motor type; According to the wiring method, it can be divided into unipolar and bipolar; According to the control mode, it is divided into: analog hysteresis, analog PI, and all-digital.

The stepper motor driver focuses on solving the problems of motor vibration, noise, heat generation, high speed, etc., such as Inals' EZM all-digital stepper drive system, which has made a great breakthrough in vibration, noise and heating.

The servo motor is a semi-closed-loop control system, with medium and high speed performance, high precision, and strong overload capacity, but it is expensive and complex in application and debugging, and generally requires a special AC servo drive to drive.

Servo motors are generally small in power, accurate in operation, capable of high-speed braking, small in inertia, suitable for closed-loop control, that is, it can detect the error of the actual position and the theoretical position, and eliminate it.

Stepper motor: Divide a circle into several steps, do not accumulate errors, and are generally used for open-loop control.

Note: Stepper motors can also be used for servo motors.

Servo motor is said according to function, refers to the motor used for servo. This is usually a DC motor, i.e. a motor that can rotate continuously.

A stepper motor is named according to its characteristics, which means that its rotation is step-by-step. For example, a 360-degree stepper motor takes 360 steps to make a turn, and each step turns 1 degree, if you ask it to turn half a degree, it is impossible to achieve.

Note: Stepper motors can also be used as servos.

What is a stepper motor? What is Servo Motor?

Selection of servo motor - brand, difference between stepper motor and servo motor.

Three points, 1, the stepper motor will have a low-frequency vibration phenomenon when AC, so it is a DC stepper motor, and the servo motor does not have this phenomenon, 2, the stepper will be stalled when it is overloaded, and the 3 stepper will not have a position ring and a speed loop, which will lead to overshoot and start time.

You bad old man, I believe you're a ghost.

You can judge by looking at the encoder, and the detailed principle recommends that you find this motor to drag the textbook.

Compared with stepper motors, servo motors have the following advantages.

1.More responsive - timely and targeted service provision - fast acceleration, fast start and stop (stepper motors generally take 200-400 milliseconds, servo motors a few milliseconds) - not easy to be damaged by fast start and stop - save money.

2.The stepper motor is easy to vibrate in the low-frequency (below 10Hz) working state, and there is a phenomenon such as losing steps, which affects the quality of the brushing tin, while the servo motor has good stability and will not produce vibration in the low-frequency working state - better printing quality, reducing the repair rate - saving money.

3.The overload capacity is strong (the range of capacity that can be borne after exceeding the rated limit), the output torque of the stepper motor decreases with the increase of speed, so the maximum speed is about 300-600s min, and the servo motor is generally rated at 2000-3000r min, and the maximum torque is 3 times of the rated torque, which is more able to adapt to long-term high-speed operation, and is not easy to be damaged due to overload compared to the stepper motor - longer service life - saving money.

Hetian Goode - servo motor - X9+

Therefore, the bosses can still try to choose servo motor products when choosing a solder paste printing machine, and here I recommend a Hetian Gude printing machine X9+, with high precision, stable printing, high cost performance, and it is a good product.

I want to know the nature of the load (such as horizontal or vertical load, etc.), torque, inertia, speed, accuracy, acceleration and deceleration and other requirements, upper control requirements (such as port interface and communication requirements), the main control mode is position, torque or speed. Whether the power supply is DC or AC power, or battery powered, voltage range. It is difficult to select without these parameters.

In fact, you can go to the corresponding company to understand the situation, generally they will help you design a better plan, there are many companies in this regard, if you are from the north, the company in Beijing is good, if you are from the south, the company in Shenzhen can also be.