ALLEGRO A4988 DMOS MICROSTEPPING DRIVER

Stepper motors typically have a step size specification e. Several alternatives are available for this product. This carrier board uses low-ESR ceramic capacitors, which makes it susceptible to destructive LC voltage spikes , especially when using power leads longer than a few inches. The headers can be soldered in for use with solderless breadboards or 0. Select variant Several alternatives are available for this product. This board is a drop-in replacement for our original and now discontinued A stepper motor driver carrier.

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Privacy policy About Geeetech Wiki Disclaimers. The translator is the key to micfostepping easy implementation of the A A microstepping driver such as the A allows higher resolutions by allowing intermediate step locations, which are achieved by energizing the coils with intermediate current levels.

Take care when handling this product and other components connected to it. Navigation menu Personal tools Log in.

A4988 Stepper Motor Driver Carrier

The headers can be soldered in for use with solderless breadboards or 0. This product can get hot enough to burn you long before the chip overheats. Simply inputting one pulse on the STEP input drives the motor one microstep. N header pins soldered?

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Add to cart Add to wish list. There are no phase sequence microsgepping, high frequency control lines, or complex interfaces to program. The A is a complete microstepping motor driver with built-in translator for easy operation. Connecting or disconnecting a stepper motor while the driver is powered can destroy the driver. Since the input voltage to the driver can be significantly higher than the coil voltage, the measured current on the power supply can be quite a bit lower than the coil current the driver and coil basically act like a switching step-down power supply.

This carrier board uses low-ESR ceramic capacitors, which makes it susceptible to destructive LC voltage spikesespecially when using power leads longer than a few inches. Mixed decay current control results in reduced audible motor noise, increased step accuracy, and reduced power dissipation. Unipolar motors with five leads microsyepping be used with this driver.

Pololu – A Stepper Motor Driver Carrier

The current limit, I MAXrelates to the reference voltage as follows:. Note that the STEP and DIR pins are not pulled to any particular voltage internally, so you should not leave either of these pins floating in your application. Shop Blog Forum Support. This page was last modified on 2 Augustat Minimal wiring diagram for connecting a microcontroller to an A stepper motor driver carrier full-step mode.

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Microsteppimg Email a friend Feeds. Some unipolar stepper motors e.

This product ships individually packaged with 0. There are no phase sequence tables, high frequency control lines, or complex interfaces to program. Four, six, and eight-wire stepper motors can be driven by the A if they are properly connected; a FAQ answer explains the proper wirings in detail. The following picture shows how to identify which current sense resistors your board has:. Free add-on shipping in USA. Internal circuit protection q4988 Select variant Several alternatives are available for this product.

Navigation Main page product Experiment Tutorials. The driver requires cmos logic supply voltage 3 — 5. The A includes a fixed off-time current regulator which has the ability to operate in slow or mixed decay modes.

The VREF pin voltage is accessible on a via that is circled on the bottom silkscreen of the circuit board. Feedback Comments or questions?

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