If your laser machine needs to reflect off of three mirrors before it finally passes the focal lens, then I would recommend realigning the laser.

You might also want to see if the nozzle is hot. If so, then the laser energy is hitting some of the nozzle body and not all of the laser energy is exiting the small aperture of the nozzle. To determine if this is the cause, remove the nozzle and try the operation again to see if you have better results. If the results are better with the nozzle off, then realign the mirrors. If you are still having difficulty getting the laser energy to exit the nozzle, increase the diameter of the nozzle aperture.

If you are still having poor results, take a look at the focal lens and the mirrors for any debris. An unclean lens and mirrors are a common cause of poor lasing performance.

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The tube is illuminated but I don't get clear firing to the piece. This is a rastering work and I get faint results and then it will be fine, then nothing. Tube changes from pink to solid line purple even when vectoring or manually holding the fire button.

If you select the Settings Page and select or tick Auto Limit Override - this will allow you to back off the switch.

Additional Information:
limit and home switch

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Hi there, when the gantry bumps up against a limit switch and triggers it, how do you tell Mach3 to allow me to jog the motor away from the limit switch? ie: I can't press RESET because the limit is open.... how do I move it? Thx.

If you select the Settings Page and select or tick Auto Limit Override - this will allow you to back off the switch.

Additional Information:
limit and home switch

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Hi there, when the gantry bumps up against a limit switch and triggers it, how do you tell Mach3 to allow me to jog the motor away from the limit switch? ie: I can't press RESET because the limit is open.... how do I move it? Thx.

The 5x10 greenBull base kit comes with the structure, hardware, and electronics for motion control. In order to have a fully functional CNC you will need a table base for your machine, a spindle or router to handle your cutting applications, end mills (bits) for cutting, CAD, CAM and CNC software, and a computer. There are also accessories you can add such as limit switches, emergency stops, and cable carrier for cable management. If you are looking for more information or a formal quote please contact sales@buildyoucnc.com

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I'm not sure of ALL the things I will need to do some of my ideas for the cnc machine. I'll mostly be cutting out 3/4" plywood projects. How much minimum for a 5' by 10' system? I need the hardware and software to get the job done. I saw the price for your basic unit 3-4 grand but don't know what all I NEED to start work.

My apologies for not getting back to you. We always answer the phones during business hours, so I would try that first. Our emails on Monday generally is stacked up as we are closed during the weekend. We can try your g-code here. Please send the g-code to the techsupport@buildyourcnc.com email address and we will test the code to see if it works.

By the way, do you get movement on the planet-cnc UI screen?

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The program starts and runs normal. I have all the correct movement on the mill and the UI screen. Then one of two things happens. It either stops and resets all axis to zero in the middle of the part or it freezes in the middle of the part. When it freezes, it is not moving on the cnc or the UI screen. Sometimes after a freeze it will come up with an 'IO timeout error', but the only way to clear is to unplug USB and start over.
I will send my settings and g-code files over tonight. Please be sure to load my settings when running the g-code. No movement of the cnc is necessary as the controller will do these issues without power to any drives and just the USB board connected, on my board at least.

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I have a MK1 board that I just got running and I am having issues. Do you have an MK1 board at your shop that I can send you my G-Code to run? The freexing/zeroing in the middle of the program issue happens even with no step drives attached to the board.

If you select the Settings Page and select or tick Auto Limit Override - this will allow you to back off the switch.

Additional Information:
limit and home switch

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When the machine hits the limits it stops but the switch is still tripped so clicking the Mach3 RESET button doesn't do anything. How am I supposed to get the machine to move off of the limit switch so I can continue working?

Since you mentioned there is a nasty smell, I'm wondering if there might have been a issue with the power supply. Can you email us your name for the order and specific voltage you are using for the redFly? at techsupport@buildyourcnc.com. Also I want to mention if you have the USB cord plugged in to the redFly if it has the parallel interface board?

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When I first hooked up my redFly and was manually testing all the axes, everything was going well, then my Y axis stopped working all together, and now my X and Z have stopped also and my redFly has a nasty smell coming from it and none of the stepper motors seem to be getting power.

Not sure what you mean by the statement "I don't know when you answer". Please explain. I answer all of the incoming emails until my inbox is completely empty and all phone calls to the company go straight to my cell phone and I answer all of the calls, and if I don't answer, I call back immediately.


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I just searched my email and found no emails with your email address associated with the email listed with this question. I cannot answer questions if no correspondence was provided by you.

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Please send an email, I am giving up on buying a machine from you because I don't know when you answer. I was asking about getting just the working parts and rails sent to Fiji. You sent an answer and some questions, but I have no way of knowing if you responded again.

If you select the Settings Page and select or tick Auto Limit Override - this will allow you to back off the switch.

Additional Information:
limit and home switch

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Using Mach3 and the USB Controller, In initializing the 'Ref All Home' the machine goes thru the procedure of zeroing out 'Z' than move to zero out 'y', but when it move to 'x' it just stops when it hits the switch instead of zeroing out?

If your laser machine needs to reflect off of three mirrors before it finally passes the focal lens, then I would recommend realigning the laser.

You might also want to see if the nozzle is hot. If so, then the laser energy is hitting some of the nozzle body and not all of the laser energy is exiting the small aperture of the nozzle. To determine if this is the cause, remove the nozzle and try the operation again to see if you have better results. If the results are better with the nozzle off, then realign the mirrors. If you are still having difficulty getting the laser energy to exit the nozzle, increase the diameter of the nozzle aperture.

If you are still having poor results, take a look at the focal lens and the mirrors for any debris. An unclean lens and mirrors are a common cause of poor lasing performance.

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Is this a problem with the tube or the power supply? The tube is illuminated but I don't get clear firing to the piece. This is a rastering work and I get faint results and then it will be fine, then nothing. Tube changes from pink to solid line purple even when vectoring or manually holding the fire button. https://youtu.be/rX5xZoM6_bk

You will definitely want to adjust your debounce setting in mach3 if your emergency or limit switch is engaging.

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Did you ever fix this issue? I am having the same problem.

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Did you ever fix this issue? I am having the same problem.

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Did you ever fix this issue? I am having the same problem.

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Did you ever fix this issue? I am having the same problem.

Additional Information:
Did you ever fix this issue? I am having the same problem.

Additional Information:
Did you ever fix this issue? I am having the same problem.

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Did you ever fix this issue? I am having the same problem.

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Did you ever fix this issue? I am having the same problem.

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Did you try changing the denounce setting?

Additional Information:
Meant to say denounce.

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When I start my spindle I get a emergency stop in Mach 3. I have run shielded cable and it is grounded at the VFD it is wired per you site instructions. any idea what to check

(These steps are to be taken with precaution, due to the fact that we do not know the model or manufacturers specifications for your BoB)

Here is a link to our CNC electronic videos(

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I have a CNC Machine from China, and the Breakout Board is not Labeled. Is there any way to test the board using Mach3 to find out the pin designations? db25 bob

CamBam specifically creates the g-code (machining operations) instructions to be loaded into Mach3. Make sure in your CamBam g-code file parameters, you are using the Mach3 post processor. If you have already done this, let me know. If you are not sure how to do this, let me know.

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I am having trouble connecting the cambam program with my Mach3 to my 4X8 Blackfoot CNC machine. Where can I get help on this issue. Have had my machine since 2015 and have not been able to use it. Thank you

If the computer has been tested to be functional, it is most likely the breakout board which is faulty. Replace the breakout board and it should solve these issues.

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My blackfoot 4x8 Starts sending erratic commands to the machine randomly in the middle of a program or freezes altogether. Replaced USB Cable, updated software, updated firmware, tried other computers. What else should I do?

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.

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.

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.

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).

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X AXIS STEPPER MOTOR STALLS AND SHUTTERS WHEN COMING FROM A STAND STILL WON'T MOVE WITHOUT PUSH BY HAND. I TOOK THE CHAINS OFF SPUN FINE WITH OUT LOAD. HAVE CHAIN HOOKED UP CAN MACHINE BACK FORTH HAND, NO HANG UPS OR ANYTHING, BUT TRY TO IT DOESN'T JUST SPINS OUT. ANY SUGGESTIONS?

Take a look at these two videos that I created today on Instagram on the proper wiring of a relay to the Mach3 USB controller.

https://www.instagram.com/tv/CMYGGBtj3cq/?utm_source=ig_web_copy_link
https://www.instagram.com/tv/CMYLvq9DXVK/?utm_source=ig_web_copy_link

Don't forget to watch the initial video on the Mach3 USB outputs on the Mach3 USB product page (last video on that page):
https://www.buildyourcnc.com/item/electronicsAndMotors-electronic-component-breakout-Mach3-USB-Board

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Hi I am trying to activate Mach3 USB Controller Output Terminals to activate a plasma from a output relay. I have looked at the video and applied 24VDC to 24v and dcm and measured from 24v and out1 and get no voltage when activating torch on mach3. The output 1 or 2 does not work.

Take a look at these two videos that I created today on Instagram on the proper wiring of a relay to the Mach3 USB controller.

https://www.instagram.com/tv/CMYGGBtj3cq/?utm_source=ig_web_copy_link
https://www.instagram.com/tv/CMYLvq9DXVK/?utm_source=ig_web_copy_link

Don't forget to watch the initial video on the Mach3 USB outputs on the Mach3 USB product page (last video on that page):
https://www.buildyourcnc.com/item/electronicsAndMotors-electronic-component-breakout-Mach3-USB-Board

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Hi I am trying to activate Mach3 USB Controller Output Terminals to activate a plasma from a output relay. I have looked at the video and applied 24VDC to 24v and dcm and measured from 24v and out1 and get no voltage when activating torch on mach3. The output 1 or 2 does not work.

Take a look at these two videos that I created today on Instagram on the proper wiring of a relay to the Mach3 USB controller.

https://www.instagram.com/tv/CMYGGBtj3cq/?utm_source=ig_web_copy_link
https://www.instagram.com/tv/CMYLvq9DXVK/?utm_source=ig_web_copy_link

Don't forget to watch the initial video on the Mach3 USB outputs on the Mach3 USB product page (last video on that page):
https://www.buildyourcnc.com/item/electronicsAndMotors-electronic-component-breakout-Mach3-USB-Board

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Hi I am trying to activate Mach3 USB Controller Output Terminals to activate a plasma from a output relay. I have looked at the video and applied 24VDC to 24v and dcm and measured from 24v and out1 and get no voltage when activating torch on mach3. The output 1 or 2 does not work.

Take a look at these two videos that I created today on Instagram on the proper wiring of a relay to the Mach3 USB controller.

https://www.instagram.com/tv/CMYGGBtj3cq/?utm_source=ig_web_copy_link
https://www.instagram.com/tv/CMYLvq9DXVK/?utm_source=ig_web_copy_link

Don't forget to watch the initial video on the Mach3 USB outputs on the Mach3 USB product page (last video on that page):
https://www.buildyourcnc.com/item/electronicsAndMotors-electronic-component-breakout-Mach3-USB-Board

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Hi I am trying to activate Mach3 USB Controller Output Terminals to activate a plasma from a output relay. I have looked at the video and applied 24VDC to 24v and dcm and measured from 24v and out1 and get no voltage when activating torch on mach3. The output 1 or 2 does not work.