OpenELAB A4988 Reprap Stepper Motor Driver + Heat Sink for 3D Printer
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OpenELAB A4988 Reprap Stepper Motor Driver + Heat Sink for 3D Printer
This stepper motor driver is powered by A4988, a DMOS microstep driver with converter and overcurrent protection. It is available in full, half, 1/4, 1/8 and 1/16 stepping modes to operate bipolar stepper motors with output drive performance up to 35 V and ± 2A.
The A4988 includes a fixed turn-off time current regulator that operates in slow or mixed decay mode.
The converter is the key to easy implementation of the A4988. As long as the "step" input carries in a pulse, you can drive the motor to produce micro-step.
There is no need for phase sequence tables, high frequency control lines or complex interface programming. The A4988 interface is ideal for complex microprocessors that are not available or overloaded.
Features
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With only a simple step and direction control interface;
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Five different step modes: full, half, 1/4, 1/8 and 1/16;
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Adjustable potentiometer can adjust the maximum current output, resulting in a higher step rate;
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Automatic current decay mode detection / selection;
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Overheat shutdown circuit, undervoltage lockout, cross current protection;
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Ground short circuit protection and load short circuit protection.
Effective Date: March 27, 2025
At OpenELAB, we are committed to providing accurate product descriptions and delivering high-quality products. If you experience any issues with your purchase, please notify us within 60 days of the shipment date.
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2. Warranty Policy
Warranty Period
The standard warranty period for products sold by OpenELAB is 12 months from the date of delivery.
Under this warranty, OpenELAB will make a reasonable effort to repair or replace products free of charge if defects are due to issues with raw materials, design, or manufacturing.
If the defect qualifies under this policy but falls outside the covered scope, reasonable charges may apply for repair or replacement.
After the warranty period, support may still be available at a reasonable fee.
Warranty Exclusions
The warranty does not apply in the following cases:
- The product is beyond the 12-month warranty period.
- Damage due to misuse, improper maintenance or storage, or failure to follow the user guide or manual.
- Issues caused by Force Majeure events (e.g., natural disasters, war, legal changes, etc.).
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If you're not satisfied with your purchase, you may be eligible for a return or exchange:
- Return for Refund: Within 15 days of receipt (unopened).
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- Exchange Window: Up to 30 days from receipt.
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