The power supply voltage is typically selected based on the motor's operating speed and response requirements. If the motor operates at high speeds or requires a fast response, a higher voltage is necessary. However, it is crucial to ensure that the power supply voltage ripple does not exceed the driver's maximum input voltage, as this may damage the driver. Selecting a lower voltage facilitates smoother operation of the stepper motor and minimizes vibration.
 

First, determine the driver's supply voltage, then the operating current; the power supply current is generally determined based on the driver's output phase current. If a linear power supply is used, the power supply current is typically 1.1 to 1.3 times the driver's output phase current; if a switching power supply is used, the power supply current is typically 1.5 to 2.0 times the driver's output phase current.
 

1 Reliable Actuator

    The actuating components in the motion cinema system are servo motors and their matching drivers. Beijing Hollysys Electric Co., Ltd. has been dedicated to the R&D, production, and sales of stepper motor and servo motor system products since 1995. As a leading enterprise in the domestic motor industry, its hundreds of product varieties, over 3,000 customers, and continuous annual growth all attest to the performance and reliability of its products.

2 Reliable Software
    Beijing Hollysys Electric Co., Ltd. possesses a leading R&D team in the industry. Years of continuous R&D investment ensure the provision of tailored system-level products based on deep market demands. The project development team has conducted extensive in-depth market research targeting the motion platform and motion cinema markets, understanding the detailed requirements of each customer, simulating on-site conditions for multiple verifications, and performing numerous practical operation demonstrations to achieve perfection in every detail. It features built-in unique algorithm software, guaranteed by patented technology.

3 Excellent Networking Solution
    Addressing the requirements for low cost and high speed in servo networking applications, we propose an Ethernet + CAN bus two-level network topology with strong scalability. Ethernet communication is implemented via 10M/100M adaptive mode, featuring high-speed, reliable, and high-capacity data transmission. The advantages over traditional pulse+direction or serial port networking are obvious (serial port networking generally has transmission rates ranging from 1M to a few hundred K, and excessive data volume easily leads to faults or time lag). On the other hand, Ethernet also has stronger anti-interference capabilities than serial ports.

4 Simple Wiring
     Standard configuration for a typical 3-axis dynamic seat: 3 sets of HS networked servo drivers + 1 SC-MBOX motion controller. External connections require only a 220V power cord and one Ethernet cable, greatly simplifying on-site wiring implementation. Compared to traditional pulse+direction or serial port networking wiring, this saves a significant amount of wiring time. Simpler wiring means fewer potential hazards and easier future equipment maintenance.

5 Real-time Monitoring and Diagnosis
    The servo driver feeds back real-time status information of the driver and motor to the host computer, allowing for real-time monitoring. When a single unit malfunctions, the status parameters of that specific motion control unit can be modified without affecting the normal operation of other units.

6 Automatic Load Reduction upon Overload
    General dynamic seats often suffer from issues caused by customer overload or improper movement (misoperation), which can cause traditional motors to trigger overload alarms and stop. Imagine the seat stopping in the middle of a movie! Furthermore, after a restart, the seat movements cannot keep up! The HS series networked servo drivers feature an automatic load reduction function upon overload. You can parameterize whether to enable overload protection and automatic smooth load reduction and recovery capabilities, perfectly resolving this issue.

7 Sensor-Less Limit Technology
    In motion platform systems, to protect the electric cylinders, two limit sensors are usually installed at both ends of the cylinder. The HS series networked servo drivers feature sensor-less limit technology, which effectively reduces the cost of the motion platform system and significantly improves reliability.

8 Integrated Special Effects 
    The SC-MBOX motion controller has built-in 12-channel digital output, 2-channel analog output, and 8-channel input signal interfaces. It can achieve special effects required in dynamic seats such as rain, wind, lightning, snow, leg sweep, bubbles, scents, and smoke, eliminating the need to purchase additional controllers.

9 No On-site Service Required
    Concise wiring, comprehensive data monitoring, and fault adjustment make this dynamic seat system very easy to get started with. In many of our existing successful cases, unless there are on-site development modification requirements, we basically guarantee zero on-site service and zero technical support. Everything is so simple that customers can handle it easily on their own!

10 High Cost-Performance Ratio
    The cost-performance ratio of the SC-MBOX motion controller and HS servo driver system solution is far superior to traditional PLC and control board solutions.

1. When selecting a stepper motor, it is essential to first ensure that the motor's output torque exceeds the torque required by the load.
During the selection process, the load torque of the mechanical system must be calculated first. The motor's torque-frequency characteristics must satisfy the mechanical load with a certain margin to guarantee reliable operation. A torque margin (e.g., 50%) should be reserved during selection.
Motor working loads can be categorized into inertial loads and friction loads. The acceleration and startup phase primarily considers inertial loads, the constant-speed operation phase considers friction loads, while direct startup requires consideration of both types of loads.

2. The dynamic torque of a stepper motor is often difficult to determine immediately; therefore, the holding torque is usually determined first. Motors with higher holding torque generally produce higher output torque. Under normal circumstances, the holding torque should be 2 to 3 times the friction load. Once the holding torque is selected, the motor's frame size and length can be preliminarily determined.

3. Consider using a motor with a smaller torque and frame size combined with a reduction device to achieve high torque output. It is necessary to comprehensively consider the relationship between torque and speed to select an appropriate reduction ratio and derive the optimal solution.

4. Estimate the mechanical load inertia to match it with the stepper motor's moment of inertia. If high dynamic response is required, it is recommended that the load moment of inertia be less than the motor's moment of inertia. Under normal circumstances, the load moment of inertia being slightly more than 1 times the motor's moment of inertia is acceptable.

5. Generally, the load inertia (reflected to the motor shaft) can be reduced by adding a speed reducer. The formula for calculating the moment of inertia is as follows: J=J_reducer + J_load / i² (where J is the total moment of inertia, J_reducer is the moment of inertia of the reducer, J_load is the moment of inertia of the load, and i is the reduction ratio)

6. Determine the maximum operating speed of the stepper motor. The speed specification is crucial when selecting a stepper motor. A characteristic of stepper motors is that torque decreases as motor speed increases; therefore, a very important task during selection is to consult the motor's torque-frequency characteristic curve. During actual operation, the load torque at various frequencies must fall within the range of the torque-frequency characteristic curve.

When selecting a stepper motor, ensure that the step angle matches the mechanical system to obtain the required pulse equivalent. Ideally, the motor's step angle divides the equivalent equally. Achieving this equal division requires the correct selection of the motor type combined with a microstepping driver (it should be noted that microstepping only changes resolution, not accuracy. Accuracy is determined by the motor's inherent characteristics).

In cases where high speed is required, a driver with a higher drive voltage can be selected. The general rule is: the higher the drive voltage and the larger the motor phase current, the slower the torque drops.

 If high dynamic response is required, it is recommended to select a motor with a moment of inertia preferably twice that of the load; otherwise, it is sufficient as long as the load inertia is less than the motor inertia.