Description: The Big Easy Driver, designed by Brian Schmalz, is a stepper motor driver board for bi-polar stepper motors up to a max 2A/phase. It is based on the Allegro A4988 stepper driver chip. It’s the next version of the popular Easy Driver board.
Each Big Easy Driver can drive up to a max of 2A per phase of a bi-polar stepper motor. It is a chopper microstepping driver which defaults to 16 step microstepping mode. It can take a maximum motor drive voltage of around 30V, and includes on-board 5V/3.3V regulation, so only one supply is necessary. Although this board should be able to run most systems without active cooling while operating at 1.4-1.7A/phase, a heatsink is required for loads approaching 2A/phase. You can find the recommended heatsink in the related items below.
Note: This product is a collaboration with Brian Schmalz. A portion of each sales goes back to him for product support and continued development.
Based on 9 ratings:
1 of 1 found this helpful:
It worked fine on first try. It does get very warm when using it with the 57BYGH420 (125 oz-in 2 amps per phase) stepper motor - even with the added heatsink.
There is an error in the sparkfun Big Easy Driver Hookup Guide. On page three the MS1 through MS3 pins are specified as having 100K pull down resistors. In fact it has pull up resistors. Thus if these lines are left unconnected the default step mode would be sixteenth step - not Full step (as it would be if the resistors really were pull down instead of up).
1 of 1 found this helpful:
Very easy to use. All pins are clearly labeled. Set the voltage to 3.3V… connected a microprocessor and wrote a quick control routine. Powered up the unit and adjusted the current up until the motor was stepping. I was able to prototype a project in short order. Thanks.
The Big Easy Driver (v1.2) is exactly that. Use the sketch from GitHub, or from the original site. Used 12vDC source (wall-wart style) and coaxial-M jack to provide power for the driver. Works well with even a smaller stepper that is/was included in the RadioShack Motor Pack for Arduino. This stepper (2730767, 5VDC, 1:64) is a bit non-standard, but is a bipolar configuration with the two coil-centers joined as pin 5. Color coding seems non standard, but resistance testing verifies the proper set of 4 pins for attachment to Coil-A and Coil-B on the Big Easy. Adjusted drive current to minimum, anticlockwise rotation to reduce heating of the stepper motor. The Big Easy is, and runs COOL.
Works great and does exactly what is says it can do. The chip does get hot, but that’s expected as I’m running a motor at about 1.5A per phase. Other than that it was really easy to set up and use with my arduino. I would definitely recommend this board as a controller if you want a simple way to control your stepper motor.
Super simple. Using a couple to drive steppers for a white board plotter.
Using it to drive the 125oz.in SparkFun motor (https://www.sparkfun.com/products/10847) from an Arduino Uno. Easy to assemble, set up, and use. 0 problems. Note though that the driver itself does get hot, depending on the current the motor is sinking. Can still drive this motor fine (didn’t measure current but had enough juice to lift a phone book off the ground, so a few pounds), but for larger motors you may want to get a heatsink.
It works as designed.
Bought for drive a high torque stepper motor but : 1. easy to get heated but area is too small to install heat sink. 2. Pin(B-) is not functioning after turned on by several times.
If you don’t have a heat sink that fits, you can cut a piece of aluminum to fit and mount it using the mounting hole on the side of the board and some thermal tape. That would be a simple diy heat sink to fit.
Did not work.
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