If you are using Mach3, go into the config menu, , Ports and Pins, and click the motor outputs tab. On the line for the axis you want to change the direction, toggle the DirStepLowActive box. This will reverse the direction of the axis.

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X axis motor only runs smoothly at a jog rate of 10% or Less

The required motors are the 425 oz-in stepping motors, would be the required motors to run the machine efficiently.

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New here, what is the best 3 axis kit for a Sherline 5400? Higher torque and quietness is my goal. Thanks

If your motor spec call for 5.5 amps, it is best to set the driver for the setting that matches that spec, or the next lowest value. This will allow the motor to run within its designed characteristics.

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For a stepper motor that requires 5.5 amps, would you recommend setting the stepper driver to 5.43 or 6 amps? Better to go lower or higher?

This sounds like it could be a loose wire, or poor connection with the motor wires. Make sure all wires that are to be connected to each other are soldered and use a lineman's splice when putting the wires together. Also, make sure that the wires going into the driver is securely fastened.

If this is an issue where the motors have run well for a long time then just started to show this performance issue, then make sure that there are no wire ties or other binding method that is chaffing the wires. This would make the motors run oddly at certain travel positions where the chafing has caused a short with the wires.

If this is an issue where you don't have the motor plugged in at all and are just trying to turn it by hand and this phenomenon is occuring, then make sure all of the wires are not touching each other. When wires are touching each other and you are trying to spin the shaft by hand, the motor will feed current back into the motor making it difficult to turn.

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stepper motor runs smooth then rough for a moment then smooth, etc. Does this at all steps, and connected motors.

Could you specify which breakout board you have? If you have a parallel port version, be sure that you have purchased the "legacy" parallel port version from Mach4. If this proves not to be the problem, please feel free to email us directly at techsuport@buildyourcnc.com or call 281-815-7701 for troubleshooting instructions.

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I need a resource, we bought 2 redfly systems and mach 4, We put one motor on for the x axis but cannot get it move. Can you direct us to some tutorial?

The 651 oz/in NEMA 34 stepper motor does have a dual shaft. The shaft extends 19 mm at both ends.

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in the 3 Axis Electronics Combo (For Heavy Gantry) the 651oz motor is a dual shaft ?

If your motors are making a strange noise as it begins a motion, or as it ramps up to the desired speed, then it is hitting it's maximum torque. First, make sure that your motor tuning (steps/inch, velocity and acceleration) are set correctly. The steps per inch should be set according to the microstepping set on the driver, and for the specific mechanics that is being used on that axis. Step/inch = (200 * microstepping) / (number of inches for one complete revolution). Second, make sure the correct current and microstepping is set on the driver for the motor that is having issues.

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my motors start clicking/stepping one step at a time and if I run a toolpath, the motors run runan inch or so them stop and make a lot of noise. Scretching almost. Any ideas.

The video showing the hookup of the large motors showed a sequence that was not correct, or I totally misread what was recommended. I hooked the first motor up that way and it would only go in one direction in a very jerky mode. I confirmed that i had hooked it up the way the video showed, disconnected the wiring that runs through to the motor and reconnected it, thinking maybe a cold solder joint was the problem. No good. I finally went to the motor page that showed a different connection pattern. I tried the one that the motor page said to do, and it works smoothly and in the right direction now.

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my motor only goes one direction. I checked all the wiring and it's correct. Any suggestions?

The amount traveled per turn in our blackFoot, will be dependent on the steps per inch settings that you will implement to your drivers and within the software (mach3 (ex)) motor tunning: steps per inch/ 1422.22, 1/4 on your driver will give you a different distance if used as 1/2 or 1/8 etc.


Here is a in depth tutorial on how to find the correct steps per inch for a specifications: (

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How far does the X axis of the blackfoot travel per turn of the stepper motor ?

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,

If the pins from the terminal block on the side of the board are outputs, or at least 2 of them are outputs, then you can connect our modular driver to the board (example: cw230). If they are all inputs, then you would not be able to connect an external driver.

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I AM USING A XYLOTEX 3 AXIS BOARD AND WANT TO ADD ANOTHER MOTOR SLAVED THE X-AXIS. WILL DRIVE CW230 WORK?

If by cogging, you are referring to the lack of torque by the presence of the lack of current to the motor, I would check the wires coming from the motor to see if there is any chafing, causing either shorting, or a connection issue. This happens on older motors due to the method of holding the wires steady using zip ties or other form that can cut the insulation of the wires. If you see this phenomenon only at specific locations on the axis, then wire chafing could be the culprit. But, can also be friction on the lead screw/anti-backlash nut.

Check the anti-backlash nut for any presence of oily debris. Remove this debris and re-lubricate the lead screw.

Check between the coupling at the motor shaft and the bearing that is positioned against the coupling. There should be a small outside diameter shim washer between the coupling and the inside race of the bearing. If there is no shim washer, then the coupling is rubbing against the outside race, causing friction, or binding.

If these methods do not work, please submit additional information on this FAQ page using the additional information button and a new solution will be submitted by us.

Customer response:
Thank you for your quick response. I found the Z-axis binding with the anti-backlash nut. What would you recommend to lubricate the anti-backlash nut and lead screw?

Additional answer:
I would recommend using 3-in-1 oil to lubricate the lead screw and the anti-backlash nut. Don't worry about the material of the anti-backlash nut breaking down since it is made of Delrin, a plastic that can be exposed to lubricants and oils.

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My Z axis stepper is "cogging," new problem on an older machine, any solutions?

You can use a multimeter to determine the wires of the same coil (i.e A+ and A- belong to he same coil). The wires that are connected on the same coil will have relatively low resistance. A wire from one coil to another coil with have no continuity since the two coils are not touching each other.

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How can I determine which wires on my stepper motor bellong to A+ A- B+ or B-?

Controlling a 3-axis or 4-axis motor configuration, you will need the following items drivers/motors/controller. Our electronics combo comes with the items mentioned and with power supply/miscellaneous items.
The only other item needed will be a computer (with controller software) to communicate and view controls of your motors.
Using the Parallel breakout board will use Mach 3 software, and USB will use Planet-CNC software.

Additional Information:
You can use this link to see the videos on how to connect the electronics together and make them work: https://www.buildyourcnc.com/tutorials/tutorial-Electronics-USB-Interface-Wiring

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hey, where can i see the steps how can i control 3 or 4 step motor? can i use the Axis Electronics Combo? or i need to connect controller?

with parallel port controllers, you have the ability to jog using two axes at the same time, but with USB controllers, this is not possible.

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[575] Hi, I recently purchased this board and everything seems to be fine! But I am not being able to jog two axis at same time as I used to do on my older board. Did I do something wrong?

If one or more motor is not responding, please follow the troubleshooting directions below:

For parallel Bob only! Make sure both the parallel and USB are connected.

Re-check wiring, and connections for continuity (no breaks in the wires) and check for correct wiring locations from driver to BoB.
Check dip switch settings on the driver.
Check components, by swapping the motors (ex. y-axis motor to z or x-axis driver and z or x-axis motor to y-axis driver) to check if motor functions on another driver.
Depending on software check step low active (mach 3) or invert pulse (planet-cnc) for the axis which is not responding.
Mach 3 - config/port & pins/motor outputs / Planet-CNC - file/settings/axes

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my x motor seems to ignore some movements causing it to be innacurate, how do i fix this?

If your axis shutters and will not move unless moved by another force, that sounds like your acceleration is set too high. Lower the acceleration until it works well, then lower it a bit more to have a margin of safety.

Users response:
I've lowered my acceleration to 1 in the StepCon program and it still shutters when I jog it, anything else I could check?

Buildyourcnc response:
IF that didn't work, try swapping the X and Y drivers. That way you will pinpoint if the issue is the driver. If the proplem persists, then there may be an issue with the motor itself.

Buildyourcnc response:
The X and Y drivers can be easily swapped by swapping only the motor wires.

- Remove the x-axis motor wires from the X driver.
- Remove the Y motor wires from the Y driver.
- Insert the X motor wires into the Y driver.
- Insert the Y motor wires into the X driver.

Buildyourcnc response:
Now the Y-axis will move the gantry. Test the Gantry movement by moving the Y axis using the up and down arrow keys (mach3).

Users response:
Problem is now solved, I switched the X and Y at the redFly and got the same problem, so then I undid the wires going to each motor and switched them there and it I had a bad solder point in the X axis connector, thank you for the help

Buildyourcnc response:
You're very welcome. We will make sure to thoroughly check the solder points on the cable connectors prior to a redFly delivery.

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X axis won't move on 5x10 GreenBull, it just shutters unless I manually with my hand give it a push then it will jog. What should I check?

To add CO2 laser functionality to your existing CNC machine, you will need everything listed on this page: https://www.buildyourcnc.com/LaserComponents.aspx

The number of mirrors and mirror mounts will depend where and at what orientation the laser tube will be mounted in the machine. There is already a mirror mount in the head/nozzle unit, so keep that in mind.

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I am looking at using a laser on my 6X6 3 axis table what do i need?

The term cGy (centigray) is a unit of absorbed dose of ionizing radiation such as x rays or gamma rays. Cell phones do not emit ionizing radiation. They emit nonionizing radiation, namely radiofrequency (RF) energy. Absorption of nonionizing radiation in the body is measured in terms of the specific absorption rate (SAR) in units of watts per kilogram. Both ionizing and nonionizing radiation are forms of electromagnetic energy. The difference is that ionizing radiation has sufficient energy per photon to cause ionization of molecules. Nonionizing radiation does not. It is the ionizing effect of ionizing radiation that has been linked to increased risk of cancer. For more information on cell phones and health check out a Medical College of Wisconsin website. For more information on ionizing versus nonionizing radiation check out a University of Michigan website. Gary Zeman, ScD, CHP Lawrence Berkeley National Laboratory

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MY QUESTION THAT KNOW CANCER CAN BE CAUSED WHEN OUR BODY EXPOSED TO DOSES OF 50 CGY OR HIGHER. WHAT DOES STAND FOR? DO EMIT?