You will also need to check if the mach3 configuration and the wiring. Since you tested the connection from the motors to the drivers, the connection from the computer to the interface may still be the issue. It could also be the connection from the interface to the drivers, but we test all of these units going out, so I don't believe that would be the problem.

If you have a redfly that uses a parallel cable, you may need to check to make sure the parallel cable is functioning properly, and also, make sure that the interface is also powered using a usb cable.

If you have a usb interface (the terminals will be labeled XD, XP and so on), then there may be a wire not seated correctly in a terminal.

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I plug in my redFly for the first time and after configuring Mach3 and rechecked my settings axes Y and Z are working well, but X is not working, just for testing I plugged in each motor to the Y and Z and they work fine, but no motor works when plug into the X axes of the redFly, also one of the NEMA 24 425 Oz motors dose not turn just jitters.

If there is play within the motor itself, then that motor may be defective. Call us to provide us more detail on this issue.

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I have NEMA 34 motors for a GreenBull 6x12. After 2 weeks of use, my Y axis motor has developed play in the front but not rear of the motor. Is this a motor defect or has something come loose somewhere? Thanks,

The frame size difference of the NEMA 23 and 24 is very slight and, depending on the motor mount both will most likely fit. The bigger difference between these stepping motors is the torque. Make sure that the motor that you purchase has the appropriate torque for the axis that it will move.

Is is safe to go with the higher torque? Or if the torque is too high for what i need is that bad?

You can use a motor with higher torque. Just make sure to select the correct driver for that motor.

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The frame size has nothing to do with torque. Nema 23 means a 2.3" frame. Nema 24 means a 2.4" frame. That's all. Either could have more or less torque depending on speed and power.

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What is the difference between a NEMA 23 and NEMA 24 motor? can I use either one on a machine?

The frame size difference of the NEMA 23 and 24 is very slight and, depending on the motor mount both will most likely fit. The bigger difference between these stepping motors is the torque. Make sure that the motor that you purchase has the appropriate torque for the axis that it will move.

Is is safe to go with the higher torque? Or if the torque is too high for what i need is that bad?

You can use a motor with higher torque. Just make sure to select the correct driver for that motor.

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The frame size has nothing to do with torque. Nema 23 means a 2.3" frame. Nema 24 means a 2.4" frame. That's all. Either could have more or less torque depending on speed and power.

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What is the difference between a NEMA 23 and NEMA 24 motor? can I use either one on a machine?

Make sure to connect the motor using the bipolar parallel schema as per the datasheet.

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I also purchased these same motors(3a drive, not the 8.8) nearly a decade ago, they are now being installed on their third life as a CNC wood lathe with C axis spindle control. I never had any perceivable problems wiring them to the diagram, but in recent R+D I discovered a strange thing. I use LinuxCNC, and while going through setup and trying to tweak in the settings for the motors/drives, I found a motor wire identification guide for steppers on the LinuxCNC wiki that gives a different result for which wires go to which terminals on the drives. I have not tested both wiring schemes since I am in the middle of the build and have not yet reached that point. This could be one factor, if the wiring diagram is not actually correct. I always used bipolar parallel. As stated above, I never detected any problems in thousands of hours of run time over two separate machine configs. The other thing I learned recently is that microstepping actually reduces STEP torque by significant amounts, though I can't find any info about its effect on HOLDING torque, if any. 1/16 microstep reduces STEP torque to ~10% of motor rated torque, which can have a significant effect on heavy cuts/fast feedrate moves. I have definitely overdriven my axes by not programming conservatively enough, I do a lot of aluminum routing and hoggy work on hardwoods. There are many other factors in machine builds(resonance, mechanics, etc) that can eat away at the motors ACTUAL real life torque capability vs. its nominal rating. Lot of good info on stepper principles on the LinuxCNC website. My current build has actual ballscrews rather than leadscrews, It will be interesting to see what the performance differences are compared to my other builds. Keep the chips flying!

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[54] I purchased a kit a few years ago with a 36v 8.8A driver and a nema 23 425oz-in motors. I’ve hooked the motors as suggested but they are not holding anything like 425 torque. Please advise.

Yes, these 425 oz-in motors are very strong. 20-30 lbs is actually very light for these motors, especially when used with ballscrews as the friction coefficient is very low.

If you ask the customer service live a question like: "how much weight can my motor lift", you will find the formulas to determine the amount of weight the motors at a particular oz-in rating can move. Typical friction coefficients are included in those formulas.

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Would the 425 Oz motor to be strong enough to turn a 4ft 2005 Ballscrew attached to a Gantry that is about 20-30lb?

We recommend checking the dip switch settings on your drivers, having the correct microstepping/amp settings along with the steps/unit will help the motors run as effective as possible.
This is a default parameter that we use while we test our motors:
Driver dip switch settings will be at a 1/16 microstepping and 2.7amp (11001100) for x/y-axis and the z-axis will be at 1/4 microstepping and 2.7amp (10101100).

In planet-cnc with increasing the motor speed, you will have to modify the settings in planet-cnc (File/settings/setup) you will modify the initial speed, maximum speed, and the acceleration.
X/Y-axis step/unit: 1422.22 initial speed:500 maximum speed:750 acceleration:25
Z-axis step/unit: 1600 initial speed:100 maximum speed:300 acceleration:25
The initial speed and maximum speed will have to be roughly tested and adjusted per application.
Make sure to adjust the JOG slide bard underneath the axis controls on screen to about 750, to compensate for your x/y-axis adjustments. If left alone the speed will max out at the default setting.

Here is a video tutorial to calculate the steps required depending on your mechanical linear motion components. (

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I bought Nema 24 motors and driver package with usb board. What do i need to have more speed? Cant even jog past 25 ipm without the motor stalling (not having enough torgue)

The motor with that model number is here: https://buildyourcnc.com/item/electronicsAndMotors-nema24-425ozin

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In looking for a stepper motor amongst old parts in my lab, I found one with a sticker that says buildyourowncnc.com and PN SM60HT86-2008BF U2 on it. I found a Q&A on your website that says it's a NEMA 24 motor with 425 oz/in holding torque. I was wondering if you were able to confirm this? Any specs sheets and details of the motor would be much appreciated

Try slowing your feedrate down and increasing spindle RPMs. End-mills will leave a poor finish if you go too fast. Make sure your cutting depth isn't too much. Maybe the endmill or cutter is blunt? Could it be the feed direction of the cutter? Some materials need to be fed in a certain direction.

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MOTOR GOING TWO DIRECTION WHEN JUST PUSH UP. IT WILL GO DOWN AND THEN GOES AGAIN UP WITH THE SAME BUTTON.

The power supply units that come with our Electronics Combo Kits have a switchable input voltage. There is a red switch on the side that allows you to switch from 220v to 110v.

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hi am over in the uk and was looking to buy one of your stepper motor bundels but our power is 240v instead of 110v do u sell other power supply units to suit our voltage thanks.

When connecting our power supply, no matter if it is 24 or 36 volts with our drivers/motors, you should always use bipolar parallel. This will allow you to have the best torque at higher speeds.

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I have your nema 24 motors using the 36v power supply. Should I use the Bipolar series for the wiring the motors since I am using the 36 volt ad not a 24v power supply?

If you are looking for the drivers to pair with NEMA 34 stepper motors, you can find the 6.0 amp drivers here:
https://www.buildyourcnc.com/item/electronicsAndMotors-stepper-driver-6!0a

The other electronics to send the signals to the 6.0 amp drivers (the control board that operates with the control software) is subject to personal preference, but here they are listed:

Our breakout board (works with Mach3 and LinuxCNC and requires a parallel port on your computer):
https://www.buildyourcnc.com/item/electronicsAndMotors-parallel-breakout-relay

The PoKeys57CNC (works with Mach3 and Mach4):
https://www.buildyourcnc.com/item/electronicsAndMotors-electronic-component-breakout-Mach4-mach3-USB-ethernet-Board

Generic USB breakout board (works with Mach3):
https://www.buildyourcnc.com/item/electronicsAndMotors-electronic-component-breakout-Mach3-USB-Board

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Do I need a driver for every motor or can I use one driver for all four motors

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Each motor needs its own driver.

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I HAVE NEMA 34 MOTORS BUT NEED THE ELECTRICAL COMPONENTS DO YOU A KIT WITHOUT INCLUDED?

Stepper motors are known to make different type of noises when in motion. So there should be no issues in regards to accuracy with the steppers. You also might be able to lower the noise that comes from the motors, by adjusting the acceleration and velocity of the motors. This usually tends to either make different noises or lowers the pitch of the noises.

Cool video(personal opinion, does not relate to BYCNC):

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My Nema 24 motors make high pitched alarm sound when changing directions quickly - what could be the cause? Red LED is lit on Microstep Driver CW230 but everything seems to run fine - is this a problem?

Yes, the 651 oz/in motor requires a driver that is compatible to the motors (the motor will draw 6 amps max and the driver paired with this motor will be able to allow for a 6 amp draw). I would also recommend a 36 volt power supply for better high velocity performance.

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I HAVE ONE OF YOUR SMALLER STEPPER MOTORS RUNNING MY X AXIS BRIDGE CRANE AND IF IT IS MOVED TO FAST THE MOTOR SOUNDS LIKE SKIPPING STEPS WILL 651OZ REQUIRE A DIFFERENT POWER SUPPLY CONTROLER?

In all CNC electronics configurations, you will need the motor paired with its own driver.

If two motors/drivers are intended for a single axis and the motors need to turn at the same rate and in the same direction, then the two drivers for these motors should be connected to the same signal wires from the breakout board (step (CP) and direction (CW)) signal wires.

If the motors need to turn in opposite directions, then either one driver will need to have the direction signal inverted, or resolve the opposite direction through a change in the mechanical drive train (i.e. flip the rack on a rack and pinion configuration, or in a roller chain setup, have the chain ride along the opposite side of the drive sprocket).

How do I go about purchasing a redleaf system with 4 drivers, where the (y) and (a) driver are connected to the same signal from the breakout board? I'd also need them to rotate in opposite directions.

The redLeaf webpage contains a purchase option for an extra motor and driver. We can setup the redLeaf system uniquely so it conforms to your application (i.e. motors running in opposite directions).

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I've built a machine where the y axis has (2) 425oz motors, x axis has (1) 425oz. motor, and the z axis also has (1) 425oz motor. Would it be better to purchase a redleaf system with 4 drivers? or can I just connect both y axis motors to the same driver for a total of 3 drivers?

We will make sure that order is changed prior to shipping.

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just placed an order for 2 nema 34 and 1 24 stepper motors i meant to have be 1, 34 and 2, 24 stepper motors. I need to change that before shipping

If your motors are hot to the touch, this is normal. Current is being drawn by the motor coils as the motor moves and as the motor stays at a position. If the motor is not using the current in the coils to move (holding it's position), the energy will be translated as heat (rather than motion, sound or light). Even while moving, some of the energy will be lost as heat. Remember that energy cannot be created nor destroyed.

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I HAVE FOLLOWED ALL THE "CNC ELECTRONICS 1 - 9" VIDEOS AND I'M USING ALMOST EXACT SAME COMPONENTS (MOTORS RUN SOUND GOOD) BUT MOTORS ARE RUNING VERY HOT IN JUST 15MIN WITH NO LOAD DONE SOMETHING WRONG OR DO STEPPERS HOT?

It may be tough to rotate a stepping motor by hand prior to energizing it especially if it is a large motor above 400 oz-in.

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I received the 425 oz-in motor from you. Is it supposed to rotate freely by hand when not powered?

The input shaft for the NEMA 24 is 1/4" inch/ 6.5mm, the schematic has a error which states 8mm, which should be 6.5mm.

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The website states the shaft of the NEMA 24 stepper motor is 1/4" in diameter. However, the datasheet states the shaft is 8mm in diameter. Which is correct?