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ALLEGRO A4988 DRIVER

December 20, 2018

We’ll notify you when there are updates to this product. A version of this board with headers already installed is also available. The A supports such active current limiting, and the trimmer potentiometer on the board can be used to set the current limit. N header pins soldered? Click the image to view larger. 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. This product can get hot enough to burn you long before the chip overheats.

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Alternatives available with variations in these parameter s: Motor connections 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. Add to cart Add to wish list. Power connections The driver requires a logic supply voltage 3 a4898 5. Feedback Comments or questions?

A4988: DMOS Microstepping Driver with Translator and Overcurrent Protection

Products New Products Specials! This product can get hot enough to burn you long before the chip overheats. Stepper motors typically have a step size specification e. The following picture shows how to identify which current sense resistors your board has:.

Pololu – A Stepper Motor Driver Carrier

In particular, increasing the voltage generally allows for higher step rates and allegeo torque since the current can change more quickly in the coils after each step. Some unipolar stepper motors e.

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Several alternatives are available for this product. The resolution step size selector inputs MS1, MS2, and MS3 enable selection from the five step resolutions according to the table below.

A4988 Stepper Motor Driver Carrier

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. One way to maximize stepper motor performance is to use as high of a voltage as is practical for your application. Internal circuit protection includes: 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.

Sanyo Pancake Stepper Motor: You can also solder your motor leads and other connections directly to the board. If this is not your local representative, find your local sales rep here.

Simple step and direction control interface Five different step resolutions: The coil current can be very different from the power supply current, so you should not use the current measured at the power supply to set the current limit. Print Email a friend Feeds. For customers interested in higher volumes at lower unit costs, we offer a bulk-packaged version without header pins and a bulk-packaged version with header pins installed.

For details about these power states, see the datasheet. We’ll notify you when there are updates to this product.

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Connecting or disconnecting a stepper motor while the driver is powered can destroy the driver. Special power-on sequencing is not required. Select variant Several alternatives are available for this product. Note that the STEP and DIR pins are not pulled to any particular voltage internally, so you should not leave aklegro of these pins floating in your application.

Click the image to view larger. More generally, rewiring anything while it is powered is asking for trouble.

Step and microstep size Stepper motors typically have a step size specification e. Otherwise, the intermediate current levels will not be correctly maintained, and the motor will skip microsteps. For the alpegro modes to function correctly, the current limit must be set low enough see below so that current limiting gets engaged.

Also, if the supply voltage is very high compared to what the motor needs to achieve the set current, the duty cycle will be very low, which also leads to significant differences between average and RMS currents. The headers can be soldered in for use with solderless breadboards or 0.