Features of the braked version:

The main advantage of the braked version is its ability to immediately and reliably lock the motor shaft in the event of a power failure or when stationary, thus preventing unintended movements or slippage due to external forces such as gravity or load.

Scope of application: Specific examples

Scenario 1: Vertical movement and load suspension, any shaft that requires resistance to gravity and prevention of the load from falling after a power failure.

• CNC machine tool Z-axis: The spindle head or cutting tool must remain securely locked in place in the event of a power failure to prevent it from falling and impacting the workpiece or work table.
• 3D printer Z-axis: Ensures that the print bed or nozzle does not slip during pauses or power failures, preventing misalignment of the model.
• Elevators and lifting devices: The safe suspension of heavy loads requires the use of brakes.
• Lifting mechanisms in medical devices: For example, operating tables and positioning arms for imaging devices.

2. Scenario: Applications that require precise positional stability. Devices may be exposed to sustained external forces during standstill, requiring brakes to maintain exact positioning.

• Rotary tables: Require locking after stopping to prevent displacement by subsequent processes (e.g., drilling, punching).
• Robotic arm joints: Especially vertical or inclined joints that must maintain their position during stopping to save servo energy or ensure safety locking.
• Valve control: Requires valves to be held in specific openings to withstand fluid pressure.

3. Scenario: Equipment with strict safety and emergency stop requirements must comply with safety standards and stop immediately and lock their position (emergency stop) in the event of a power failure.

• Handling modules in automated production lines: In the event of an emergency stop, held workpieces must not slip or fall.
• Drives for safety doors and protective devices: Doors must remain closed and locked in the event of a power failure.
• Textile and packaging machines: Prevents material from coming loose during unexpected stoppages.

4. Scenario: Energy saving and reduced heat generation of the system. During prolonged position holding, the motor power can be switched off, with locking being achieved exclusively via mechanical brakes. This significantly reduces the energy consumption and heat generation of the motor.

• Actuators in extended standby positions.
• Battery-powered mobile devices: When position holding is required in addition to energy saving.

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  The difference between open and closed control loops:

  • An open-loop stepper motor is comparable to a vehicle equipped only with an accelerator pedal and an odometer. If you command it to travel 100 meters, it may only cover 95 meters on inclines or when slipping, as the wheels spin freely. The system does not recognize this deviation.
  • A stepper motor with a closed control loop, on the other hand, is equipped with ESP (Electronic Stability Program) and real-time GPS. Given the same command to travel 100 meters, the system immediately detects the position deviation in the event of wheel slip and automatically compensates for it, so that the vehicle comes to a stop precisely after exactly 100 meters. The system always knows its actual position.

  eature Dimension	open-loop Stepper Motor	Closed-Loop Stepper Motor
  Working Principle	The driver sends pulses, assuming the motor follows completely with no position feedback.	The driver sends pulses, and the encoder real-time feeds back the actual position of the motor shaft to form closed-loop control.
  Core Issue	Step Loss: When load changes suddenly, acceleration is too fast, or resonance occurs, the motor loses pulses, causing permanent position errors. The system cannot detect this.	Real-Time Correction: When the encoder detects any position deviation (e.g., shock load), the driver immediately supplements pulses to correct and eliminate the error.
  Accuracy & Reliability	Conditionally reliable: Must operate within the "comfort zone" with sufficient motor torque margin. Reliability depends on conservative engineering design.	Consistently reliable: Even under harsh conditions like overload or vibration, it ensures consistency between command position and actual position. Higher reliability.
  Performance	May vibrate and produce loud noise at low speeds; torque drops rapidly at high speeds; resonance zones exist.	Smoother operation, lower noise; better high-speed performance; effective resonance suppression.
  Energy Efficiency & Heating	Overpowering is usually required to prevent step loss, leading to severe heating of the motor and driver, and high energy consumption.	Current is dynamically adjusted based on actual load, providing maximum torque only when needed. Heating is significantly reduced, energy efficiency is improved, and motor lifespan is longer.
  System Cost	Low initial purchase cost.	Higher initial purchase cost. But it reduces risks of scrap, downtime maintenance, and system failures caused by step loss, so the total cost of ownership may be lower.

   

  Description of closed-loop motors:

  1. Product highlights

  -Closed-loop motors feature an additional encoder that eliminates positioning errors: The integrated encoder monitors every step. Unexpected loads trigger an immediate position correction – ideal for mission-critical applications.

  -Forget about lost steps! Closed-loop technology ensures absolute reliability for your drive system.

  -Improved performance, reduced heat generation: Intelligent current control delivers exactly the torque required. The result: superior energy efficiency and significantly lower operating temperatures compared to conventional stepper motors.

  2. Technical description

  -Conventional stepper motors (open loop) operate reliably within the specified load ranges. However, sudden load changes, high acceleration, or resonance can cause step loss, leading to system misalignment. Our 57 mm closed-loop system fundamentally solves this problem. It functions like a “lightweight servo drive”: it offers servo-level precision and reliability at the cost and with the simplicity of a stepper motor.

  3. Application scenarios

  Choose the closed-loop kit in the following circumstances:

  - When production or precision requirements are business-critical

  - In environments subject to vibration or variable loads

  - In applications requiring high acceleration or wide speed ranges

  - In situations where system failures and costly rework must be avoided