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More suitable for high-speed operation of the servo motor

The positioning distance and positioning time of the motor on the inching-based mechanism such as the braiding machine and the dividing plate are very short. The servo motor, which is also the positioning motor, accounts for a large proportion of the whole positioning time when starting and stopping. The open-loop stepper motor, on the other hand, operates completely in accordance with the instructions and does not waste time on its own adjustments. So in the inch, the stepper motor positioning time is shorter, and the number of action, the higher the frequency, the higher the efficiency.

Feb 27,2024

Comparison of the degree of follow-up to commands when positioning stepper motors and servo motors

The stepper motor has the characteristics of high response, high synchronization, no gain adjustment, low speed and high torque. Compared with the servo motor which is more suitable for high-speed operation, it has more advantages in the short stroke inching equipment. Understanding and using these characteristics will help improve the overall efficiency of the device. First of all, let's compare the degree of follow-up of instructions when positioning stepper motors and servo motors: The servo motor waiting for encoder feedback in real time may have a command "delay", and there is a set time for each positioning. The stepper motor operates synchronously with the pulse, so there is almost no "delay". The positioning distance and positioning time of the motor on the inching-based mechanism such as the braiding machine and the dividing plate are very short. The servo motor, which is also the positioning motor, accounts for a large proportion of the whole positioning time when starting and stopping. The open-loop stepper motor, on the other hand, operates completely in accordance with the instructions and does not waste time on its own adjustments. So in the inch, the stepper motor positioning time is shorter, and the number of action, the higher the frequency, the higher the efficiency. The structure and types of mechatronics servo control systems are various, but from the perspective of automatic control theory, servo control systems generally include controllers, power amplifiers, actuators, and mechanical components. The composition of the servo drive system 1. The controller is usually a computer or PID control circuit. The main task is to transform the deviation signal output by the comparison element to control the actuator to act as required. The composition of the servo drive system 2. Power amplification is to compare the input command signal with the feedback signal of the system for power amplification. The composition of the servo drive system 3. The role of the actuator is to convert various forms of input energy into mechanical energy according to the requirements of the control signal to drive the controlled object to work. Mechatronics system in the implementation of components generally refers to a variety of motors or hydraulic, pneumatic servo mechanism. The composition of the servo drive system 4. Mechanical components refer to the controlled mechanism or device, which is the main body that directly completes the purpose of the system. Generally includes the transmission system, the implementation of the device and the load. The composition of the servo drive system 5. The detection link refers to the device that can measure the output and convert it into the dimension required by the comparison link. It generally includes a sensor and a conversion circuit. In the actual servo control system, each of the above-mentioned links is not independent in hardware characteristics, and several links may be in one hardware, such as the speed measuring DC motor, which is the actuator and the detection element.

May 22,2023

How can a straight line module distinguish between noise and normal noise?

The tumbling body on the slider moves back and forth in the track groove. The principle of circulation will produce some noise when the tumbling body slides. This noise is not called noise and has no effect on production, but it can also be eliminated. If the noise is too large, it is different from the noise during normal operation, and even abnormal operation may occur, which will reduce the life limit and accuracy of the equipment, increase its maintenance cost, and even cause the equipment to be scrapped in serious cases. Therefore, we should not be in a hurry when we hear the noise when the linear module is operating. We should first identify whether the noise is caused by the abnormal operation of the equipment. If so, please refer to the following methods: (I), because different equipment requests different preloads, noise will occur when the preloads are different; the so-called preload refers to the preload of the linear guide slider tumbling body on the trajectory, also called the degree of coordination. Linear guide slider preloading level is divided into light preloading, medium preloading, medium preloading, overweight preloading. The selection conditions of different preloading methods are as follows: Light preloading: suitable for load direction, sensational, small impact force, 2-axis side-by-side equipment. Accuracy request is not high, single request sliding resistance of small equipment. For example: beam welding machinery, binding machinery, active packaging machine, usually XY axis of industrial machinery, active door and window processing machine, welding machine, etc; Medium preload: equipment with cantilever load or moment, equipment used in single shaft, light load and high precision equipment. For example, grinding machine work table feed shaft, active coating machine, industrial robot, measuring device, fine XY channel, etc; Heavy preloading: request high rigidity, sensational impact equipment, high load and heavy cutting machine tools. For example: machining base, NC lathe, grinding wheel feed axis, tool guide, etc. Overweight preloading: request higher rigidity, sensational impact is great, such as: the Z axis of the working machine and the applicable machine of the heavy preloading. (II), in the dusty environment, the noise of the linear guide rail; in this case, you can choose the slider with dust-proof equipment, or you can choose the linear guide slider according to your own practical needs. (III), smooth grease is different, and noise will also be generated. Some customers use high-strength grease due to the inconvenience of refueling the machine. The viscosity is extremely large, resulting in increased friction of the tumbling body, which increases the noise. Perhaps some equipment manufacturers do not refuel diligently, resulting in no smoothness of the tumbling body, which will also increase the noise. In this way, the service life limit of the equipment will also be reduced.

May 26,2022

Advantages and Disadvantages of Constant Voltage Drive and High and Low Voltage Drive

The development of drive technology, from the original foreign outstanding to the emergence of various domestic technologies, we can see the progress of domestic technology, but also can see that every technological innovation will bring several market revolutions to guide the market with technology. The following editor will introduce the advantages and disadvantages of constant voltage drive and high and low voltage drive of stepping motor. 1. Constant voltage drive Single voltage drive means that in the process of motor winding, only one direction voltage is used to supply power to the winding, and multiple windings provide voltage alternately. This method is a relatively old driving method and is basically not used now. Advantages: simple circuit, few components, simple control, relatively simple to implement Disadvantages: must provide a large enough current transistor to switch processing, stepper motor running speed is relatively low, the motor vibration is relatively large, the heat is large. Since it is no longer used, it is not described. 2. High and low voltage drive Due to the above shortcomings of constant voltage drive and the further development of technology, new high and low voltage drive has been developed to improve some shortcomings of constant voltage drive. The principle of high and low voltage drive is to use high voltage control when the motor moves to the whole step, low voltage control when moving to the half step, and low voltage control when stopping. Advantages: High and low voltage control improves vibration and noise to a certain extent. The concept of subdivision control of stepping motor is proposed, and the working mode of halving the current when stopping is also proposed. Disadvantages: The circuit is relatively complex to drive with constant voltage, and the high-frequency characteristics of the transistor are required to increase. The motor still vibrates at low speed and the heat is still relatively large. This drive mode is basically not used now.

Jun 23,2020

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The product range covers precision linear modules, servo electric cylinders, linear motion units, three-axis manipulators, servo flexible grippers, etc., which are widely used in automated precision intelligent manufacturing scenarios, and the company also provides customers with tailor-made automated overall intelligent solutions.