A stepper motor is a synchronous electric motor that moves in fixed angular increments (steps) with each electrical pulse. For example, every pulse rotates the shaft by 1.8° or 7.5°, depending on the motor’s phases.
The Role of the Driver
The GM‑STEP‑DRIVER‑1 is compatible with GM motors and provides:
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STEP/DIR or PWM/Analog inputs
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Current settings (160 mA / 330 mA)
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Operating modes: stepper or DC motor
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Vibration suppression under load
Why Choose a Stepper Motor Over a Regular DC Motor?
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Precise control – No need for position sensors
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Immediate response – Fast and accurate movement
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High reliability – Brushless design
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Easy integration – Compatible with PLCs, Arduino, Raspberry Pi
GM Stepper Motor Series – Modular, Tailored Solutions
The GM31, GM32, GM33, and GM34 series from Amironic feature stepper motors with integrated gearboxes. Each model suits different torque, size, speed, and current needs.
| Model | Operating Voltage | Max Holding Torque | Max Current (Continuous) | Max Length (mm) | Gear Ratio |
|---|---|---|---|---|---|
| GM31 | 12V | 50 Ncm | 250 mA | up to 71.5 | up to 1470:1 |
| GM32 | 12V | 20 Ncm | 150 mA | up to 36 | up to 391:1 |
| GM33 | 12V | 25 Ncm | 250 mA | up to 44.5 | up to 90:1 |
| GM34 | 12V | 100 Ncm | 250 mA | up to 51.3 | up to 630:1 |
Key Advantages of GM Motors:
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High torque in a compact size
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Integrated gearbox for tailored performance
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Quiet operation and low wear
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Broad selection of gear ratios
The GM-STEP-DRIVER-1 – Simple and Full Control
This driver includes 7 operating modes (via DIP switches), offering control over:
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Speed via PWM or analog voltage/current (1–5V, 2–10V, 4–20mA)
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Rotation direction
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Stepper or brushed DC mode
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Max current: 160 mA or 330 mA
Common Applications for Gearbox Stepper Motors
3D Printing
GM32 and GM33 are ideal for X, Y, and Z axes due to their compactness and precision. The gear ratio ensures smooth, controlled motion with minimal slip.
Medical Devices
In robotic biopsy arms or automated blood sampling systems – the GM34 with a 630:1 ratio provides smooth, safe micro-movements.
Automated Laboratory Equipment
In test tube sorters or liquid injection systems, the GM-STEP-DRIVER-1 enables accurate speed control and stable torque under varying loads.
Industrial Automation
Valve actuators, console movements, and robotic arms benefit from the GM31 with a 1470:1 ratio, excelling at low-speed, high-torque applications.
Robotics and Micro-Mechanics
Small educational or light-duty industrial robots require compact, precise motors – the GM32 with a 188:1 ratio and 36 mm length is a great fit.
Pan-Tilt Camera Systems
For stabilizing cameras, scanning environments, or object tracking. The GM33 offers precise steps, and the driver ensures smooth motion control.
Conveyors and Mini Transport Systems
In small production lines or item shuttling, the GM34’s high operating current and torque deliver reliable performance.
How to Choose the Right Stepper Motor?
Key considerations:
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Required rotation speed
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Torque (including under dynamic loads)
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Movement accuracy (microstepping)
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Available voltage and current
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Physical size and mounting compatibility
Quick User Guide
Electrical Connection
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Power Supply: Stable 12V DC
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Connect GM‑STEP‑DRIVER‑1 to the motor using the appropriate color wires per model (see datasheets on Amironic’s website)
DIP Switch Configuration
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Choose STEP/DIR or PWM/Analog mode
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Set current: 160 mA or 330 mA
Initialization and Control
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Connect digital or analog control signals
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Send a series of STEP pulses – compatible with PLCs, Arduino, etc.
Testing
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Start with slow motion: Check for overheating
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Compare expected torque and speed under static and dynamic load
Frequently Asked Questions (FAQ)
Q: What’s the difference between GM31 and GM34?
A: Mainly torque and size – GM34 goes up to 100 Ncm, GM31 up to 50 Ncm. GM32 is smaller and more compact.
Q: Can I use microstepping?
A: Yes – the driver supports micro-step mode via DIP switches.
Q: Is cooling required?
A: For continuous high-current use (330 mA), especially in industrial settings, passive cooling or heat sinks are recommended.
Q: Can I use the motors without a gearbox?
A: Technically yes, but torque at low speeds will be limited. Gearboxes boost torque and reduce speed for controlled performance.