5pcs A4988 Stepper Motor Driver 3D Printer with Heatsink

Description

5pcs A4988 Stepper Motor Driver 3D Printer with Heatsink
Description:
A4988 is a complete microstepping motor driver with built-in translator for easy operation. This product is available in full, half, 1/4, 1/8 and 1/16 step modes operate bipolar stepper motors, output drive capacity of up to 35 V and ± 2 A. A4988 includes a fixed off-time current regulator, the regulator in slow or mixed decay modes. A4988 converter is the key to the easy implementation. As long as the “step” input inputting one pulse drives the motor one microstep. There are no phase sequence tables, high frequency control lines, or complex interfaces to program. A4988 interface is very suitable for complex microprocessor is unavailable or is overburdened.
In the micro-step operation, A4988 chopping control inside automatically selects the current decay mode (Slow or Mixed). In mixed decay mode, the device is initially set to a fixed downtime in some fast decay, then the rest of the slow decay downtime. Mixed decay current control scheme results in reduced audible motor noise, increased step accuracy, and reduced power consumption. Internal synchronous rectification control circuitry is provided to improve the pulse-width modulation (PWM) operation power consumption. Internal circuit protection includes: thermal shutdown with hysteresis, undervoltage lockout (UVLO), and crossover-current protection. Special power sequencing.
A4988 surface mount QFN package (ES), a size of 5 mm _ 5 mm, nominal overall package height of 0.90 mm, with an exposed pad for enhanced thermal dissipation. This package is Pb (suffix-T), with 100% matte tin leadframe plating.
Features:
Low RDS (On) Output
Automatic current decay mode detection / selection
Mix with slow current decay modes
Synchronous rectification for low power dissipation
Internal UVLO
Cross-current protection
3.3 and 5 V compatible logic supply
Thermal shutdown circuitry
Ground fault protection
Load short-circuit protection
Optional step five models: full, 1/2, 1/4, 1/8 and 1/16
Diagram:
Simple step and direction control interface,
Five different step resolutions: full-step, half-step, quarter-step, eighth-step, and sixteenth-step,
Adjustable current control lets you set the maximum current output with a potentiometer, which lets you use voltages above your stepper motorês rated voltage to achieve higher step rates,
Intelligent chopping control that automatically selects the correct current decay mode (fast decay or slow decay),
Over-temperature thermal shutdown, under-voltage lockout, and crossover-current protection,
Short-to-ground and shorted-load protection.
Usage:
The driver requires a logic supply voltage (3 _ 5.5 V) to be connected across the VDD and GND pins and a motor supply voltage of (8 _ 35 V) to be connected across VMOT and GND. These supplies should have appropriate decoupling capacitors close to the board, and they should be capable of delivering the expected currents (peaks up to 4 A for the motor supply).
Stepper motors typically have a step size specification (e.g. 1.8 or 200 steps per revolution), which applies to full steps. A microstepping driver such as the A4988 allows higher resolutions by allowing intermediate step locations, which are achieved by energizing the coils with intermediate current levels. For instance, driving a motor in quarter-step mode will give the 200-step-per-revolution motor 800 microsteps per revolution by using four different current levels.
Package Contents:
5x A4988 Stepper motor driver module
Colour could be red or green
Shipping
Shipping Policy
Our warehouse is located in Washington DC and we use USPS services for posting small items. We also use couriers for larger packages, or if you have upgraded your delivery during checkout.
We will ship all orders received before 5am on the same day between Monday to Friday. Please provide your phone number for the couriers. We will ship to your address specified on the checkout, please ensure correct shipping address is selected on your payment, as we are unable to change addresses afterwards.
Delivery Time
Most of our customers receive their orders within 5 days, please note we rely on economy services where the service is not guaranteed to arrive within this time, unless you select day definite service.
Collection
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Remote locations and oversize parcels
In the rare occasion that we are unable to find an economy carrier for the parcel size and/or for the shipping address, we will contact you to let you know of the available options. Fees may apply. If no other options are available, we may cancel your order. We appreciate your understanding for any inconveniences caused and we hope that you understand we always do the best we can to ship our products to you, our valuable customer.
Service
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