[HIGHSPEED] Easy Driver Pro Version: 7.1.0.16

Contrary to the advertising, the Big Easy Driver unfortunately cannot handle 2 A/winding current. A4988 based drivers like the BED can handle only about 1A/phase without extra cooling.

You will need an industrial stepper driver, like the one Amazon recommends on the product page, or the Pololu 36V4 driver (4A/phase continuous without extra cooling), and a 35-45 Volt motor power supply.

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jremington:

For maximum speed with any stepper, you need a high voltage motor power supply (typically 40V) and for the stepper linked, a current limiting driver capable of at least 2 Ampere/phase continuous.

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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.

If you had a loose connection or a bad power supply and the stepper motor is not running (after checking the power supply, potentiometer, example code, and connections to your microcontroller), it's possible that the driver was damaged. If you are able to move the stepper motor's shaft and the board's IC or GND plane gets extremely hot to the touch, the board might have been damaged. In extreme cases, the IC blows out from having a loose connection.

Make sure that you have good solder joints. Any loose connections between your stepper motor and the channels of the stepper motor driver can damage the IC. In general, if there is a loose connection when the coils of the stepper motor are energized and connected to the channels, there will be feedback that will fry the stepper motor's IC.

You might need to adjust the potentiometer to provide more power to the stepper motor. There is a current adjustment potentiometer that would be the best to allow more current to the stepper motor. The stepper motor should be able to run more smoothly (assuming you have enough power from your power supply) after adjusting the potentiometer. You would need a precision, flat head screwdriver. Make sure to adjust the potentiometer slowly. Applying too much force and turning it too much can damage the component. It does not take much to damage the potentiometer.

Make sure that your power supply is stable. Unstable power supplies will cause the stepper motor driver to blow out. The ripple and spikes in voltage can cause the IC to work harder and will blow out from the feedback.

The Big Easy Driver was able to work with the 68 oz.in and 125oz.in stepper motor. Testing it with a variable benchtop power supply at 9V/2A, I was able to get it working with both the old bildr turorial's example one_stepper_example.ino provided in one of the old bildr tutorials -easy-driver-arduino/ and the example code that was provided in the SparkFun hookup guide => _Easy_Driver/blob/Hw-v1.6_Fw-v1.0/Firmware/SparkFun_Big_Easy_Driver_Basic_Demo/SparkFun_Big_Easy_Driver_Basic_Demo.ino . The maximum that we saw the power supply pull was around 1.9A briefly when the potentiometer was adjusted to the maximum current.

Hello! A few days ago i ordered the Big easy driver - ROB-12859 for stepper motors and also the NEMA 23 stepper motor - ROB-13656. I know that the big easy driver requires a voltage supply of 8v - 35v on the M+ motor power pin. and this stepper motor is rated at 3.2v. My question is, is it safe to use a 12v power supply in order to power this stepper motor through the big easy driver using the motor power pin (M+) ? I am concerned i might damage the motor if i am supplying it with too much voltage, or does the big easy driver regulate this voltage? If i cant do this then how would i get this motor to work if the supply needs to be within 8v - 35v ? Thanks!

Just a "Ha ... how about that!" ...was watching "The Blacklist" Season #1 Episode #6 a guy is rigging a car to blow up with remote detonator [about 34 sec in] and includes a "RED" PC board in his "rigging". Of course when I see the Sparkfun signature red board I can't help myself .... I gotta single frame it to see if I can figure out which board it is. Sadly it's this one. I say "sadly" because it should have been an XBee, or maybe a GSM. How you would use a stepper motor driver to blow up a car I have no idea!! (Homeland Security ... please carefully re-read that last sentence .. thank you).

I'm using the Big Easy Driver to run the 57BYGH420 stepper motor (cdn.sparkfun.com/datasheets/Robotics/57BYGH420.PDF). Because I'm at the maximum current rating of the Big Easy Driver, I've attached two heatsinks, one on the driver chip and another on the underside of the Big Easy Driver. I also have a fairly powerful fan blowing on the Big Easy Driver to help cool it down.I'm powering the Big Easy Driver with a 12 Volt 3 Amp power supply. I've hooked it up as per the tutorial. I'm not using the white and yellow cables from the stepper motor, so it's being operated as a bipolar stepper motor.

Unfortunately, the stepper motor has good control and then there's a small flame and the board is fried. There's a black burn mark on the driver chip next to the white number one printed on the board. The stepper motor requires 2A/phase, but I thought that the Big Easy Driver could handle this. Should I be using a different driver?

Guessing:If you attached the heat sink to the bottom and not the driver IC ... then it is very possible that the heat was not dissipating though the board as expected. The red silkscreen of the bottem side would prevent a good contact to the VIA's and provide a poor contact aria unless modified.

Whoops totally smoked a Big Easy Driver today. :P I tried out 4 different stepper drivers to see which could hold a NEMA34 strongly in one place. I started out with the EasyDriver using 12V but I could still turn the stepper with my hands. This NEMA34 is to rotate the object being machined 60 degrees at the push of a button... so each gizmo gets clamped once for every 6 holes.So I stepped up to 24V. I've got a lab supply and a supply cannibalized from a samsung printer. My goal was to dedicate the printer's supply to this project, so once I saw I was drawing only an AMP or so from the bench unit, I went back to the printer supply, rated for 1.6A.

Anyhow, I bought a big fancy CNC driver board from Sain and even though it would get quite warm, none of its settings could hold the shaft in place firmly enough. A Rugged Circuits "Rugged Motor Driver" shield held the stepper in place the best of everything I tried, but I'm manually running the PWM and using arduino's Stepper() class, so it is noisy. I put the rotate() code in a function, so the operation of the program is similar between the EasyDriver code I have from the past and the Rugged sample code.

However the motors run really slow (like 10 RPM) , but when MS1 is jumped to ground and MS3 and MS2 are floating it seems to run about 1-2 rev/sec but that's still too slow. I assume I can run these motors much faster and I'm not understanding something about the motor driver.

One thing to keep in mind is that stepper motors (at least with low end drivers) are really made for very fine position accuracy, not speed. Torque drops off with speed, so at some high speed you will get zero torque (which means your motor will stop spinning if you accelerate up to that speed). Normally with a BED at 12V and the simple NEMA17s, I can get up to about 15,000 to 20,000 microsteps/second before the motor has zero torque, which is about 10 revs/sec. Note that you HAVE to accelerate smoothly up to these speeds, you can't just start from zero and jump right to 20Ks/s. Adjusting your current set pot on the BED can make a huge difference to your max speed and torque, as can adjusting your input voltage. Also note that on a normal Arduino, Accelstepper can't go much higher than 4Ks/s. With a faster board like a chipKIT Fubarino Mini or Fubarino SD, Accelstepper can easily hit 20Ks/s or more.

This stepper motor driver is getting very hot. i am following the wiring exactly in the bildr article and using 30 V. However I tried with 20V, 18V, it is all making the chip pretty hot. is this normal? the amperage draw is between 0.3 and 0.7 for my motor. That is well within the big easy drivers rating. any suggestions?

The driver chip will get very hot, depending on your input voltage and current setting. At 30V input, you'll be generating more heat with the driver chip than at 12V for example. I'd try adjusting the current set pot on the BED. Turn it down some, and you will notice the driver chip doesn't get as hot. You will need to tune the current set pot for the smoothest (but still strong) stepping of your whole setup.

Hello, I want to control 4 stepper motors of 24v and 2A and 4 of these drivers are looking the most promising option right now. My concern is what kind of power supply do I need ?Would a 24v 60W power supply with 2.5A be able to power the four drivers and motors ? Do the power supply need to have an exact amperage of 2A ? be457b7860