Need help?Do you have a question about the Fastech Ezi-Step ST and is the answer not in the manual?
Read and understand manual contents, mechanical characteristics, and safety information before operation.
Check for damage or missing parts before installation to prevent injury or damage.
Handle with care, use non-flammable materials, and ensure proper cooling to prevent accidents and overheating.
Ensure correct input voltage range and follow wiring diagrams for safe connection and operation.
Handle protection functions, avoid free motor operation, and set signals correctly before applying voltage to prevent damage.
Stop power supply before checking or repairing; do not change cabling while power is supplied to avoid injury.
High precision microstep function and filtering using MCU for precise current control and smooth operation.
Suppresses motor vibration and enables high-speed operation by adjusting current phase based on motor pole position.
Automatically increases voltage and uses software damping for high-speed operation, preventing torque loss and vibration.
Lists drive specifications including input voltage, current consumption, temperature, humidity, resolution, and protection functions.
Details motor specifications like voltage, current, resistance, inductance, torque, weight, and dimensions for various series.
Shows torque-speed curves for Ezi-STEP-MPB-42, -56, -60, and Ezi-STEP-HPB-86 series motors.
The Ezi-STEP ST is an all-in-one micro-stepping system designed for high-speed and high-precision drive of stepping motors. It incorporates a unique control scheme powered by an on-board high-performance 32-bit digital signal processor, ensuring optimal motor performance.
The core function of the Ezi-STEP ST is to provide precise and smooth control over stepping motors. It achieves this through several key features:
Microstep and Filtering: The system utilizes a high-performance MCU to operate at step resolutions from 1.8° down to a maximum of 0.0072° (1/250 steps). It adjusts the PWM control signal every 25 microseconds, allowing for more precise current control and high-precision microstep operation. This ensures very fine and accurate motor movements.
Software Damping: This feature addresses common issues like motor vibration and torque reduction at high speeds. Motor vibration, typically caused by magnetic flux variations, is suppressed by the Ezi-STEP drive. It detects these problems and the MCU adjusts the phase of the current according to the motor's pole position, drastically reducing vibration. This also helps maintain torque at high speeds, which can otherwise be lowered due to back-EMF and reduced phase voltages from the drive.
Improvement of High-Speed Driving: The Ezi-STEP ST automatically increases the supply voltage depending on the stepping motor's speed. This prevents torque from decreasing due to low operating voltage caused by back-EMF at high speeds, thereby enabling sustained high-speed operation. The software damping algorithm further contributes by minimizing vibration and preventing loss-of-synchronization during high-speed movements.
Drive Output Signal Monitoring: For enhanced reliability and diagnostic capabilities, the Ezi-STEP ST provides various alarm signals. These include loss of step, run/stop status, over-current, over-heat, over-voltage, power status, and motor connection alarms. These alarms can be monitored by a connected controller and are also visibly indicated by a flashing LED on the motor, allowing for quick identification of operational issues.
The Ezi-STEP ST is designed for ease of integration and operation, offering flexible settings and clear status indications:
Input Signal Handling: The drive accepts positioning pulse commands from a user host motion controller. It supports both 1-pulse and 2-pulse input modes, which can be selected via a DIP switch. The input schematic for CW and CCW signals is designed for 5V TTL level. For input signals exceeding 5V (e.g., 12V or 24V), an external resistor (Rx) is required to prevent damage to the drive.
Rotational Direction Setting: Users can configure the rotational direction (CW or CCW) based on the CW(+Dir signal) input to the driver, with a default setting for CW mode. This is adjustable via a DIP switch.
Resolution Setting: The number of pulses per revolution can be precisely set using a DIP switch, offering a wide range of resolutions from 500 to 50,000 pulses per revolution. The default resolution is 10,000 pulses per revolution.
Stop Current Setting: To prevent overheating during prolonged idling, the motor current automatically reduces to a user-defined percentage (10% to 100%) after 0.1 seconds of motor stop. This "stop current" value is selectable via a DIP switch, with a default of 50%.
Drive Status LED: A multi-color LED provides immediate visual feedback on the drive's operational status. Green indicates power input, red indicates an alarm (flashing to identify the specific protection mode), yellow indicates CW rotation, and orange indicates CCW rotation.
Output Signal Monitoring: The drive provides photocoupler outputs for Alarm and Run/Stop signals. The Alarm output is ON when a protection mode is activated, signaling the host controller to stop motor driving commands. The Run/Stop output is ON when motor positioning is completed. These outputs can be configured for inverse mode if needed.
Motor Free Input: This input allows for manual adjustment of the motor shaft position from the load side. When the signal is ON, the drive cuts off power to the motor, allowing for free movement. When the signal is turned OFF, power is restored, and the motor recovers its holding torque. This is useful for initial setup or manual positioning.
Alarm Reset Input: If a protection mode is activated, an Alarm Reset input signal can be used to cancel the Alarm output. It's crucial to remove the source of the alarm before resetting it.
The Ezi-STEP ST is designed with considerations for safe installation, operation, and repair:
Installation Guidelines: The manual emphasizes careful handling during installation to prevent damage or injury. It recommends installing the Ezi-STEP ST in a place with non-flammable materials, preferably metal, to mitigate fire risks. For multiple units in a sealed area, a cooling fan is advised to maintain ambient temperature below 50°C, preventing overheating.
Cable Connection Safety: Users are instructed to keep input voltage within the rated range and to follow wiring diagrams precisely. Crucially, input power must be off before connecting cables to prevent electric shock or fire. The Ezi-STEP ST case should be grounded, as it is insulated from the internal circuit by a condenser, to prevent electric shock.
Operation Safety: If a protection function (alarm) occurs, the cause must be addressed before releasing the alarm. Continuous operation without resolving the cause can damage the machine or injure the user. All input signals should be OFF before supplying input voltage. Default parameter values should only be changed after thoroughly reading the manual.
Check and Repair Safety: Before checking or repairing the Ezi-STEP ST, power to the main circuit must be stopped, and a waiting period is required to allow electricity in the capacitor to dissipate, preventing electric shock. Cabling should not be changed while power is supplied. Reconstruction of the Ezi-STEP ST is prohibited, as it can lead to electric shock and void the after-service warranty.
Qualified Personnel: Installation, connection, operation, checking, and repairing processes should only be performed by qualified personnel to ensure safety and proper functioning.
General| Motor Type | Stepper Motor |
|---|---|
| Supply Voltage | 24VDC |
| Communication | RS485 |
| Material | Aluminum |
| Non-Slip Surface | Yes |
To Next Page